Give one example of gas in liquid solution Class 9

Give an example of gas in liquid solution and gas in gas solution 2 See answers 1886 1886 Heya mate here is your answer. GAS IN LIQUID SOLUTION - aerated drinks ( carbon dioxide dissolved in water under pressure.) one otta is equals to 10^-18 10^-20 10^-39 10^- NCERT Solutions For Class 9. NCERT Solutions For Class 9 Social Science; A solution is a homogeneous mixture of one or more solutes in a solvent. Sugar cubes added to a cup of tea or coffee is a common example of a solution. The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas present above the. Question 5. Give one example of gas in liquid solution. Answer: Cold-drinks, carbon dioxide gas as solute is mixed with water as a solvent. Question 6. How can a solution be dilute or concentrated? Answer: The amount of solute dissolving in a solvent decides whether the solution is dilute or concentrated. Question 7 Examples of Mixtures of liquids and gases. Between the two cases, the following list gathers some examples of mixtures in which a liquid element and a gaseous one are presented. The soft drinks. Example Coca Cola. The dew, liquid particles in a gaseous medium. A bottle of beer. The foam of a shampoo. A cloud. Foaming drinks

Liquid-gas solutions are those in which the solute is in the liquid phase and the solvent is in the gaseous phase. Camphor in nitrogen gas is a good example of a liquid-gas solution Liquids are difficult to compress as particles have less space between them to move. Liquids have fixed volume but no fixed shape. The rate of diffusion in liquids is higher than that of solids. Force of attraction between the particles is weaker than solids. Example of a liquid state of matter: water, milk, blood, coffee, etc (35) Name the three states of matter. Give one example of each. Ans. The three states of matter are Solids, Liquid and Gas. The example of Solids: Sugar. The example of Liquids: - Milk. The example of Gas: - Air. (36) State two characteristics properties of : (a) a solid (b) a liquid (c) a gas Homogeneous solutions are solutions with uniform composition and properties throughout the solution. For example a cup of coffee, perfume, cough syrup, a solution of salt or sugar in water, etc. Heterogeneous solutions are solutions with non-uniform composition and properties throughout the solution. A solution of oil and water, water and chalk.

Types of Solution. Liquid solutions, such as sugar in water, are the most common kind, but there are also solutions that are gases or solids. Any state of matter (solid, liquid, or gas) can act both as a solute or as a solvent during the formation of a solution NCERT Solutions for Class 9 Science - List of Chapters. Chapter 1 Matter in Our Surroundings. Chapter 2 Is Matter Around Us Pure. Chapter 3 Atoms and Molecules. Chapter 4 Structure of the Atom. Chapter 5 The Fundamental Unit of Life. Chapter 6 Tissues. Chapter 7 Diversity in Living Organisms. Chapter 8 Motion (b) Give one example of diffusion of gases in a liquid. Solution 42 (a) Diffusion in gases shows that their particles move very quickly in all directions and the rate of diffusion of a gas depends on its density

Give one example of the colloidal solution in which solid acts as the dispersed phase and gas as the dispersion medium. Give one example of (a) solution of a gas in a liquid (b) solution of number of gases. Answer: (a) An aqueous solution of ammonia NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure Liquid/Liquid Solutions. Many household liquids and automotive products are examples of liquid/liquid solutions.. antifreeze - The substance that keeps a car's radiator from freezing up during the winter is a solution of water and ethylene glycol.; mouthwash - The minty liquid that keeps your breath smelling fresh is one or more chemicals, such as cetylpyridinium chloride, dissolved in water

Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry chapter 2 (Chemical Changes & Reactions) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any (b). Aerosol- Aerosol is a colloid in which a solid or liquid is dispersed in a gas. Examples are hairspray and fog. (c). Emulsion - An emulsion is a colloid in which minute droplets of one liquid are dispersed in another liquid which is not miscible with it. Examples are milk and butter. (d) The examples of colloids that we usually find around us are as follows. 1. Liquid aerosol. The aerosol sprays that we either use as personal perfumatory products usually contain aerosol. The various types of insecticide spray or repellents we use against mosquitoes and other insects The dirty clothes get washed by soap solution. Question 33. Give an example each for a mixture having following characteristics : Two or more coloured constituents soluble in a solvent. Two immiscible liquids. One of the components changes directly to the gaseous state. Suggest a suitable method to separate the components of these mixtures. Examples of Homogeneous Mixtures: Solid, Liquid and Gas. A chemical mixture combines two substances that maintain their own properties when combined. Heterogeneous mixtures are made up of a non-uniform composition, while homogeneous mixtures are made up of a uniform composition. For example, water and sand is a heterogeneous mixture — you can.

give an example of gas in liquid solution and gas in gas

  1. In these solutions, the solute may be liquid, solid, or gas. For example, a mixture of oxygen and nitrogen gas is a gaseous solution. (ii) Liquid solution: The solution in which the solvent is a liquid is known as a liquid solution. The solute in these solutions may be gas, liquid, or solid. For example, a solution of ethanol in water is a.
  2. Lakhmir Singh solutions for Class 9 Chemistry - Science Part 2 chapter 1 (Matter in Our Surroundings) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams
  3. NCERT Class 9 Science Lab Manual - Solution, Colloids, Suspension Introduction Solution: It is a homogeneous mixture of two or more substances. Solutions can be solid solutions e.g. alloys; liquid solutions e.g. lemonade and gaseous solutions e.g. air. A solution is made up of solute and solvent. Solute: The component of the solution that is [
  4. gle with water to form a pink solution. Diffusion of a liquid into a liquid Arrange gas jar containing Bro
  5. 100 ml of water at room temperature of 2 5 0 C is taken in a beaker and a little of solid S is dissolved it in by stirring to obtain a solution X. More of solid S is added to the solution with constant stirring while keeping the temperature of teh solution constant at 3 0 0 C.After some time, it is observed that no more solid dissolves in water, and the same time, some solid is also left.
  6. Some examples of solutions can be given as follows; Gas in Gas: Air. Gas in liquid: Soda. Liquid in liquid: Water and alcohol. Solid in liquid: NaCl in water. Liquid in solids: Mercury amalgam, mercury in silver. Solids in solids: Alloys, steel, brass, bronz
  7. Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry chapter 3 (Water) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any
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Give an example. What is the sign of Answer: Henry's Law: The mole fraction of a gas in a solution (solubility of gas in liquid) is directly proportional to partial pressure of gas over solution. where KH is Henry's law constant, %gas is mole fraction of gas and ^gas is the partial pressure of gas. NCERT Solutions for Class 9. Based on the whether the solvent is water or not, solutions are of two types. Aqueous solutions: These solutions have water as the solvent. Examples of such solutions are sugar in water, carbon dioxide in water, etc. Non-Aqueous Solutions: These solutions have a solvent that is not water. It could be ether, benzene, petrol, carbon tetrachloride. Free Question Bank for 9th Class Science Is Matter Around Us Pure 9th CBSE Science Is Matter Around Us Pure. Give an example of gas in liquid solution (ii) gas in gas solution. View Give one example of two miscible liquids where distillation can be used for separating them. View Solution play_arrow; question_answer130). CBSE Class 9 Science Practical Skills - Solution, Colloids, Suspension. EXPERIMENT. AIM Give an example of a solution in which gas is solute and liquid is solvent. Examinee: Aerated drinks. He then observes the coloured paper from the other side of the test tube through the liquid one by one. The correct observation out of the.

Examples: (i) A solution of sugar in water is a solid in liquid solution. In this solution, sugar is the solute and water is the solvent. (ii) A solution of iodine in alcohol known as 'tincture of iodine', has iodine (solid) as the solute and alcohol (liquid) as the solvent. (iii) Aerated drinks like soda water etc., are gas in liquid. Answer to: Give examples of solutions that exist where the solute is a gas, and the solvent is a liquid. By signing up, you'll get thousands of.. Download the questions hereChapter 1 Class 9 - Matter In Our Surroundings.pdfThe password to open the file is -teachooisbestQ1. Give the full form of LPG and CNGAnswerLPGstands for Liquified Petroleum Gas andCNGstands for Compressed Natural Gas.Q2. Why is the diffusion of one solid into another a s Chemical Changes and Reactions Dalal Simplified Class-9 ICSE Chemistry Solutions Chapter-2 . We Provide Step by Step Solutions of Exercise/Lesson -2 Chemical Changes and Reactions with Additional Questions , Previous Year Questions and Unit Test-2 of Dr Viraf J Dalal Middle School Chemistry Allied Publishers.Visit official Website CISCE for detail information about ICSE Board Class-9 Q.5. Give two examples each for: (i) Aerosol, (ii) Emulsion. In what way are they different? Answer (i) Aerosol: Clouds, smoke (ii) Emulsion: Milk, face cream. 0.6. Smoke and fog both are aerosols. Both fog and smoke have gas as the dispersion medium. The only difference is that the dispersed phase in fog is liquid and in smoke it is a solid

Solubility of Gases in Liquids, Solid in Liquid, & Liquid

Important applications of Henry's law: gas. 2) In deep-sea diving: Nitrogen is more soluble than Helium in our blood. In the deep sea, the pressure is higher than at the surface of the water. When diver tries to come rapidly towards the surface of the water, pressure decreases and dissolved nitrogen comes back from blood and makes bubbles in veins At a given temperature in any gas, liquid or solid, there are particles with different amounts of kinetic energy. In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour Give an example of a solid solution in which the solute is a gas. the equilibrium in a gas in liquid solution shifts in backward direction since dissolution of gas in liquid is an exothermic process. Hence the solubility of the gases decreases. NCERT Solutions for Class 9 Science Chapter 11 Work and Energy Water New Simplified Class-9 Dalal ICSE Chemistry Solutions Chapter-3. We Provide Step by Step Solutions of Exercise/Lesson -3 Water with Additional Questions , Previous Year Questions and Unit Test-3 of Dr Viraf J Dalal Middle School Chemistry Allied Publishers. Visit official Website CISCE for detail information about ICSE Board Class-9

Give reasons for the following observations: (a)A gas completely fills the vessel in which it is kept. (b) A gas exerts pressure on the walls of the container. (c) Naphthalene balls disappear with time without leaving any solid, (d) We can easily move our hand in air but to do the same through a solid block of wood, we need a karate expert Liquid gets the shape of container in which it is kept. Liquid cannot be compressed much. Liquid has less density compare to solid. Liquid is lighter than solid. Liquid flows and hence is called fluid. Gas: Matters which have indefinite shape and volume are called gases. For example - air, oxygen, hydrogen, nitrogen, carbon-dioxide, etc. 15.6: Liquid-Liquid Solutions. In 2010, a major oil spill occurred when an explosion on a drilling rig in the Gulf of Mexico released millions of gallons of crude oil into the Gulf. Oil is primarily a mixture of hydrocarbons (organic compounds composed of only carbon and hydrogen atoms). Because of its composition, oil does not dissolve in water

NCERT Solutions For Class 9 Science Chapter 2 Is Matter

8. Evaporation- The process of conversion of a liquid into vapour (or gas) at its boiling point is called evaporation.Some particles in liquid always have more kinetic energy than the others. So, even when a liquid is well below its boiling point, some of its particles have enough energy to break the forces of attraction between the particles and escape from the surface of the liquid in the. 1. Different types of Solutions On the bases of water as Solvent: Solutions can be classified into 2 types on the basis of whether the solution is water or not. Aqueous Solution:- The solution in which any state of homogeneous compound completely dissolves in water, in which water acts as a solvent. Examples of this kind of solution are sugar. Table 13.1. 1 lists some common examples of gaseous, liquid, and solid solutions and identifies the physical states of the solute and solvent in each. The formation of a solution from a solute and a solvent is a physical process, not a chemical one. That is, both solute and solvent can be recovered in chemically unchanged forms using. 35 Solutions For example, 10% ethanol solution in water means that 10 mL of ethanol is dissolved in water such that the total volume of the solution is 100 mL. Solutions coxntaining liquids are commonly expressed in this unit. For example, a 35% (v/v) solution of ethylene glycol, an antifreeze, is used in cars for cooling the engine A solution is composed of one phase (e.g., solid, liquid, gas). Particles in a solution are not visible to the naked eye. A solution does not scatter a light beam. Components of a solution cannot be separated using simple mechanical filtration

Living Science Solutions for Class 7 Science Chapter 8 Physical And Chemical Changes are provided here with simple step-by-step explanations. These solutions for Physical And Chemical Changes are extremely popular among Class 7 students for Science Physical And Chemical Changes Solutions come handy for quickly completing your homework and preparing for exams Download free PDF of best NCERT Solutions , Class 9, Chemistry, CBSE-Is Matter Around Us Pure . All NCERT textbook questions have been solved by our expert teachers. You can also get free sample papers, Notes, Important Questions As a homogeneous mixture, a solution has one phase (solid, liquid, or gas), although the phase of the solute and solvent may initially have been different (e.g., salt water). Gases [ edit ] Air can be more specifically described as a gaseous solution (oxygen and other gases dissolved in the major component, nitrogen) 9. (1) Balance different types of atoms one at a time; (2) balance types of atoms that appear only Give an example of a word equation, a formula equation, and a chemical equation. It is prepared in liquid form by reacting chlo-rine gas with methane gas. Hydrogen chlorid

10 Examples of Gas-Liquid Mixtures - LORECENTRA

Class-IX Term - (2010-11) MM : 80 Total Marks 15 22 32 11 80 Total 18 27 15 64 16 80 Differentiate between transverse and longitudinal waves and give one example of each. A body is floating on the surface of a liquid. With the help of a diagram show the two forces A flask contains 4.4g of C02 gas. Calculate c Class 2 (Gases) Three divisions 2.1 -Flammable gas - Gas at 20 degrees C (68 degrees F) or less -- 101.3 kPa (14.7 psi) of pressure -- Is ignitable at 101.3 kPa (14.7 psi) when in a mixture of 13 percent or less by volume with air -- Has a flammable range at 101.3 kPa (14.7 psi) with air of at least 12 percent 11 Answer: Molten material moving under the earth's crust is called magma. When magma comes to the surface of the earth it is known as lava. Question 3. Give one example each of an active volcano and a dormant volcano. Answer: Active Volcano - Mt. Stromboli and Mt. Etna in Italy. Dormant Volcano - Mt. Kilimanjaro of Africa Properties of gas: Properties of gas. (i) Gases neither have definite shape nor have fixed volume. (ii) They can be compressed much. (iii) They can take any shape. (iv) They are neither rigid nor fluids. (v) Their intermolecular force of attraction is least. (vi) The kinetic energy of its particles is maximum Example 3: Calculate the pressure produced by a force of 800 N acting on an area of 2.0 m 2. Solution: Pressure is defined as force per unit area or P = F / A P = (800 N) / (2.0 m2) P = 400 N / m2 = 400 Pa. Example 4: The pressure of a gas contained in a cylinder with a movable piston is 300 Pa. The area of the piston is 0.5 m 2. Calculate the.

Allow the gas to pass through soap solution. Now soap bubbles are formed which contain the gas produced during the reaction. Bring a burning candle near one of the bubbles. The gas burns with a pop sound. This shows that the gas produced during the reaction is hydrogen. Zn + 2 HCl → ZnCl 2 + H 2 ↑ Question 18 A homogeneous mixture looks like all one thing, even though it is made up of different components. Air is invisible; seawater is a liquid that looks clear; the steel legs of a classroom chair are made from an alloy, a homogeneous mixture. Yes, a solution is a homogeneous mixture. An example of a homogeneous solution is a soft drink LPG is another example of a familiar process in which both the chemical and physical changes take place. LPG is present in liquid form in the cylinder. When it comes out of the cylinder, it converts into gaseous form which is a physical change. It undergoes chemical change when gas burns in air

Online test of Chapter 1 Matter in our Surrounding 1 Science| Class 9th Questions : 1. During evaporation, particles of a liquid change to vapours only: (a) from the surface (b) from the bulk (c) from both surface and bulk (d) neither from surface nor from bulk 2. Which of the following statements is incorrect?.. Definition: Liquefied gas Liquefied gas means a gas which when packaged under pressure, is partially liquid at temperatures above-50°C. A distinction is made between: (i) High pressure liquefied gas: a gas with a critical temperature between -50°C and+65°C; and (ii) Low pressure liquefied gas: a gas with a critical temperature above +65°C. Compressed Gas Safety Level (CGSL) defined as ppm On adding water to sodium, the solution formed is (a) Neutral (b) Alkaline (c) Acidic (d) Classify the following as homogeneous or heterogeneous and give one example of each: i. Solid-Solid. ii. Solid-Liquid iii. Gas-Gas iv. Liquid-Liquid v. Gas-Solid [5] Question 3 (a

One gas jar is filled with CO 2 (either by laboratory method: CaCO 3 + HCL, or by allowing living plant tissue to respire in a closed jar). Another jar is similarly filled with O 2 (either by laboratory method: MnO 2 + KClO 2, or by allowing green plant tissue to photosynthesize in a dosed jar).The gases may be tested with glowing match stick. The oxygen jar is then inverted over the mouth of. Question 3. Name one metal and one metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C). Answer: Metal: Mercury (Hg) Non-metal: Bromine (Br) Two metals with melting points less than 310K are Cesium (Cs) and Gallium (Ga). Question 4 Types of Lasers There are many types of lasers available for research, medical, industrial, and commercial uses. Lasers are often described by the kind of lasing medium they use - solid state, gas, excimer, dye, or semiconductor. Solid state lasers have lasing material distributed in a solid matrix, e.g., the ruby or neodymium-YAG (yttrium aluminum garnet) lasers. The neodymium-YAG laser emits.

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What is a liquid-gas solution? What are some examples

EXAMPLE EXERCISE 4.1 Change of Physical State. Refer to Figure 4.1 for the changes of physical state. (a) The change from solid to liquid is called . melting. (b) The change from liquid to gas is called . vaporizing. (c) The change from solid to gas is called . sublimation. Solution. State the term that applies to each of the following changes. Solution: (a) Liquid (b) Solid or liquid (c) Liquid or gas 6. Give two reasons to justify— (a) Water at roo m temperature is a liquid. (b) An iron almirah is a solid at room temperature. Solution: (a) Water at room temperature has a definite volume, but it does not have a definite shape. Thus, water at room temperature is a liquid

States of Matter - Solid, Liquid, Gas & Plasma with

Lakhmir Singh Manjit Kaur Class 9 Chemistry 1st Chapter

Gas-Liquid Chromatography (GLC) or Simply Gas Chromatography (GC): It is a type of chromatography in which the mobile phase is a carrier gas, usually an inert gas such as helium or an unreactive gas such as nitrogen, and the stationary phase is a microscopic layer of liquid or polymer on an inert solid support, inside glass or metal tubing. The key difference between solution and suspension is that the particles of a solution are invisible to the naked eye whereas the particles of the suspension are visible.. In the natural environment, most of the substances exist as mixtures (E.g. air, water). In a mixture, there are two or more substances, but they do not join with each other by chemical means There are three types of solutions in chemistry: gaseous solutions, liquid solutions, and solid solutions. These are equivalent to the three main phases used in chemistry. Solutions are homogeneous mixtures, which means that the components form a single phase. The major component is called the solvent, and the minor components are called the.

Types of Solutions - Different Types, Homogeneous

1)Bubbles of a gas may be formed on electrodes. 2) Deposits of metals may form an electrodes. 3)Changes in colour of solution may occur. The chemical effects produced by an electric current depends on the nature of conducting solution, and on the nature of electrodes used for passing the electric current Concerning chemistry, Solutions can be defined as the mixtures of two or more substances, where the solvent is in the liquid form, and the solute can be liquid, solid or gas. There are many different types of solutions and have many distinct features, but in a broad sense, they can be categorized as True, Colloidal or Suspension solutions Ammonia, anhydrous appears as a clear colorless gas with a strong odor. Shipped as a liquid under its own vapor pressure. Density (liquid) 6 lb / gal. Contact with the unconfined liquid can cause frostbite. Gas generally regarded as nonflammable but does burn within certain vapor concentration limits and with strong ignition Class 9 Science Chapter 2 Important Extra Questions Set - 1. What is meant by a pure substance? A pure substance is one which made up of only one kind of particle either atoms or molecules. For example, oxygen, carbon etc. To make a saturated solution 36g of sodium chloride is dissolved in 100g of water at 293K

Simethicone liquid drops can be mixed with water, baby formula, or other liquids to make swallowing easier for an infant or child. Always follow directions on the medicine label about giving simethicone to a child. Call your doctor if the child's gas symptoms do not improve after treatment with simethicone Give an example where heat, light and sound are produced during a chemical change. Answer: Burning of a fire cracker is accompanied by evolution of heat, light and sound. Question 4. Give an example of a physical change in which the colour of the substance changes. Answer: Heat a piece of iron wire on fire. After some time, it turns red in colour Answer: (a) When charcoal is evolved in burnt in air, carbon dioxide is formed. This gas when passed through the lime water, turns it milky. This is the test of CO2 gas. Or. Add some water in the test tube in which gas is collected. Now, cover the test tube. Shake it well. Test the solution with blue litmus and red litmus. Blue litmus turns red Thus, by choosing one of the above methods according to the nature of the components of a mixture, we get a pure substance. With advancements in technology many more methods of separation techniques have been devised. In cities, drinking water is supplied from water works. A flow diagram of a typical water works is shown in Fig.9. Fig. Write one chemical reaction for the preparation of D 2 O 2. Calculate the strength of 5 volume H 2 O 2 solution. (i) Draw the gas phase and solid phase structure of H 2 O 2. (ii) H 2 O 2 is a better oxidising agent than water. Explain. Melting point, enthalpy of vapourisation and viscosity data of H 2 O and D 2 O is given below

Solution - Definition, Properties, Types, Videos & Example

By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers. Each of the layers is called a phase. Figure 2.9 (a) Division 2.1 (Flammable gas). For the purpose of this subchapter, a flammable gas (Division 2.1) means any material which is a gas at 20 °C (68 °F) or less and 101.3 kPa (14.7 psia) of pressure (a material which has a boiling point of 20 °C (68 °F) or less at 101.3 kPa (14.7 psia)) which - (1) Is ignitable at 101.3 kPa (14.7 psia) when in a mixture of 13 percent or less by volume with. A homogenous mixture will only exist in one phase of matter, it will be either a gas, liquid, or solid. A homogenous mixture cannot be comprised of gas and liquid, as this would make the mixture heterogeneous in nature. In a homogenous mixture, you can't separate out the components of the mixture using mechanical means Chemical Reactions and Equations Class 10 Important Questions Long Answer Type. Question 1. Solid calcium oxide was taken in a container and water was added slowly to it. (AI 2008C) (i) State the two observations made in the experiment. (ii) Write the name and chemical formula of the product formed (b) One metal which is used to prepare hydrogen gas in the laboratory. (c) One metal which will displace copper from copper sulphate solution. (d) One metal which will not displace copper from copper sulphate solution. Answer: Question 16. Name one metal which will fit each of the following description. Also write the equation of the reaction

NCERT Solutions For Class 9 Science Chapter 1 Matter in

The gases, liquids, or solids dissolved in water are the solutes. In the graphic, the blue bottle is a homogeneous solution mixture of water, KOH, glucose, oxygen gas dissolved, and methylene blue - an indicator. Since solutions are mixtures, their compositions may vary over a very wide range 9. Dissolving Dissolving, also known as dissolution is the process in which a solid or a liquid forms a solution in a solvent. Dissolving, also known as dissolution is the process in which a solid or a liquid forms a solution in a solvent.An excellent example of this would be putting sugar in a cup of tea or coffee Matter in our surroundings class 9 Revision Notes, Get Revision notes of Class 9th Science Chapter, Matter in our surrounding notes. Matter is everything in this universe that occupies space and has mass. Download science revision for all chapters absolutely free. Register now to get a free class A homogeneous equilibrium is one in which all of the reactants and products are present in a single solution (by definition, a homogeneous mixture ). Reactions between solutes in liquid solutions belong to one type of homogeneous equilibria. The chemical species involved can be molecules, ions, or a mixture of both. For the homogenous reactio These MCQ Questions on Separation of Substances Class 6 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 5 Science Class 6 and cross-check your answers during preparation. Question 1. A mixture of iodine and sand can be separated by: (a) Decantation


And the blue colour of copper sulphate solution changes to light green due to the formation of iron sulphate. So, it is a chemical change. Physical and Chemical Changes: Long Answer Type Questions Question: Give an example of a chemical reaction for each of the following situations: A change in colour is observed. A gas is evolved. Sound is. Butter and mayonnaise are examples of a class of colloids called emulsions. An emulsion is a colloidal dispersion of a liquid in either a liquid or a solid. A stable emulsion requires an emulsifying agent to be present. Mayonnaise is made in part of oil and vinegar Oxidizing liquids and solids can be severe fire and explosion hazards. Common oxidizing liquids and solids include: There are other chemicals that are oxidizing materials. For example, liquid air has been involved in many explosions because of its oxidizing properties. Liquid air itself has about 30% oxygen which makes it a powerful oxidant Students can solve NCERT Class 12 Chemistry Solutions MCQs Pdf with Answers to know their preparation level. 1. The molality of pure water is. 2. The number of moles of NaCl in 3 litres of 3M solution is. (c) 3M solution means 3 moles in 1 litre. ∴ 9 moles in 3 litre

NCERT Solutions for Class 9 Science Chapter 2 Is Matter

The difference between solid, liquid and gas can be drawn clearly on the following grounds: A substance having structural rigidity and has a firm shape which cannot be changed easily is called solid. A water-like fluid, that flows freely, having a definite volume but no permanent shape, is called liquid I think we're all reasonably familiar with the three states of matter in our everyday world they're at very high temperatures you get a fourth but the three ones that we normally deal with ours are things could be a solid a liquid I'll do that in blue well it doesn't have to be blue or it could be a gas and we have this general notion and I think water is the example that always comes - at. Poisonous gas is a gas which is known to be so toxic to humans as to pose a hazard to health during transportation or for which actual testing has shown that the lethal concentration which kills 50% of the test animals (LC50) is less than or equal to 5000 ml/m3 (0.5% by volume in air) Miscible liquids combine to form a suspension in which the total fluid volume contains roughly equal parts of the two component liquids, while immiscible liquids do not mix. When two immiscible liquids are put into the same container, they form distinct layers with a clear border. An example of immiscible liquids is water and oil

Liquids: In liquids particles are not as closely packed as in solids. This is the reason liquids can take the shape of the container they are poured into. Gases: In gases particles are very loosely packed and they can easily flow from one place to another. Question: Describe how the states of matter change in terms of the movements of tiny. Nitrogen is natural gas available in the air with a concentration of 78.09%.. It forms 78% of the earth's atmosphere, making it the largest available element. Chemically it is a combination of two atoms of nitrogen and each atom has 7 electrons.. But in the atmosphere, nitrogen exists in different forms like ammonia, oxides, organic compounds, etc.. It is available in almost all livings. What are metalloids? Give examples. Answer: Metalloids are the elements which have properties intermediate, between those of metals and non-metals. Ex.: Boron, Silicon, Germanium, Arsenic, Antimony. Question 7. Give an example of a metal which (a) is liquid at room temperature. (b) is the best conductor of heat. Answer: a) Mercury b) Silver. NCERT Solutions for Class 8 Science - NCERT Solutions for Class 8 Science is provided here of Chapter 3 Synthetic Fibres and Plastics of Class 8 Science. Students can read the complete NCERT Solutions for Class 8 Science. This page provides the questions and answers for all Chapters of Class 8 Science in a simple and clear manner. Download the NCERT Solutions for Class 8 Science PDF here