| Column A | Column B | ||
| 1. | A chemical reaction which proceeds with the evolution of heat. | a. | Chemical change |
| 2. | A chemical reaction which proceeds with the absorption of heat. | b. | Exothermic reaction |
| 3. | Name of a change brought about by the decomposition of fruit juice. | c. | Oxygen |
| 4. | Name of change brought about when current passes through an electric bulb. | d. | Endothermic reaction |
| e. | Physical change |
| Column A | Column B | ||
| 1. | A chemical reaction which proceeds with the evolution of heat. | a. | Exothermic reaction |
| 2. | A chemical reaction which proceeds with the absorption of heat. | b. | Endothermic reaction |
| 3. | Name of a change brought about by the decomposition of fruit juice. | c. | Chemical change |
| 4. | Name of change brought about when current passes through an electric bulb. | d. | Physical change |
| e. | Oxygen |
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| Column A | Column B | ||
| 1 | The intermolecular force acting between same kind of molecules. | A | Melting |
| 2 | The intermolecular force acting between different kinds of molecules. | B | Cohesive |
| 3 | Intermixing of different substances due to random motions of their molecules. | C | Gas |
| 4 | The molecules of a state of matter having very large kinetic energy. | D | Adhesive |
| e | Diffusion |
| List $-I$ | List $-II$ |
| $1.$ Naphthalene from naphthalene $\&$ sodium chloride. | $A:$ Separating funnel |
| $2.$ Cream from milk. | $B:$ Sublimation |
| $3.$ Kerosene oil from kerosene | $C:$ Boiling oil $\&$ water. |
| $4.$ Lead nitrate from an aqueous solution of lead nitrate. | $D:$ Centrifugation |
| $E:$ Distillation |
| Column A | Column B |
| 1. A liquid which dissolves other substances in it. | (a) Colloid |
| 2. A solution which can hold more of solute at a given temperature, than saturated solution. | (b) Universal solvent |
| 3. The solvent which can dissolve all kinds of matter. | (c) Solvent |
| 4. A heterogeneous mixture of insoluble particles of solute having particle size more than 105 cm. | (d) Supersaturated |
| (e) Suspension |
| List $-I$ | List $-II$ |
| $1.$ An atom of hydrogen | $D:$ One electron |
| $2.$ A strong oxidising agent | $E:$ Dilute nitric acid |
| $3.$ A promoter used ¡n Bosch process | $A:$ Chromic oxide |
| $4.$ A chemical used in the manufacture of fertilizers | $B:$ Ammonia |
| $C:$ Iron |
| Column A | Column B |
| 1. An amorphous allotrope of carbon used in gas masks. | (a) Anthracite |
| 2. An amorphous allotrope of carbon used for making electrodes of dry cells. | (b) Ammonia liquor |
| 3. Name of a mixture of gases obtained by passing steam through white hot charcoal. | (c) Gas carbon |
| 4. The hardest variety of coal. | (d) Charcoal |
| (e) Water gas |
| Column A | Column B |
| 1. A free state of carbon. | (a) Petroleum |
| 2. A combined state of carbon. | (b) Buckminsterfullerene |
| 3. A form of carbon which is a good conductor of heat and electricity. | (c) Allotropy |
| 4. A free form of carbon whose one molecule has 60 carbon atoms. | (d) Graphite |
| (e) Diamond |
| List $-I$ | List $-II$ |
| $1.$ Mass number of an atom is the number of protons and | $A:$ Electron |
| $2.$ The sub$-$atomic particle with a negligible mass. | $B:$ Argon |
| $3.$ An atom having stable electronic configuration. | $C:$ Nitrogen |
| $4.$ A molecule formed by sharing of electrons $[$covalency$]$.. | $D:$ Sodium |
| $E:$ Neutrons |
| $'A\ '$ | $'B\ '$ |
| $(1)$ Nitric oxide | $(A) \ce{CuS}$ |
| $(2)$ Copper $[II]$ sulphide | $(B) NO$ |
| $(3)$ Iron $[II]$ sulphide | $(C) \ce{FeS}$ |
| $(4)$ Magnesium nitrate | $(D) \ce{Mg(NO_3)_2}$ |
| Column A | Column B |
| 1. The substance left after heating a hydrated substance. | (a) Hard water |
| 2. The substance which absorbs moisture from air, but does not change its state. | (b) Potassium, calcium and sodium |
| 3. The metals which react with cold water. | (c) Anhydrous substance |
| 4. The metals which do not react with water. | (d) Hygroscopic substance |
| (e) Copper, silver and gold |
| Column A | Column B |
| 1. Short form of an element. | (a) Chemical equation |
| 2. Symbolic representation of a compound. | (b) Valency |
| 3. The number of hydrogen atoms which combine directly of indirectly with one atom of an element, so as to form a compound. | (c) Symbol |
| 4. Mass of reactants = Mass of products. | (d) Chemical formula |
| (e) Law of conservation of mass |