Question
| Column A | Column B |
| 1. Evaporation | a. process by which pure water is obtained |
| 2. Diarrhoea | b. water cycle |
| 3. Sca water | c. waterborne disease |
| 4. Distillation | d. large amounts of dissolved salts |
| Column A | Column B |
| 1. Evaporation | a. process by which pure water is obtained |
| 2. Diarrhoea | b. water cycle |
| 3. Sca water | c. waterborne disease |
| 4. Distillation | d. large amounts of dissolved salts |
| Column A | Column B |
| 1. Evaporation | b. water cycle |
| 2. Diarrhoea | c. waterborne disease |
| 3. Sca water | d. large amounts of dissolved salts |
| 4. Distillation | a. process by which pure water is obtained |
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| Column A | Column B | ||
| (a) | Marie Curie | (i) | Safety Lamp |
| (b) | John dalton | (ii) | Helium |
| (c) | William Ramsey | (iii) | Nobel Prize Winner (two times) |
| (d) | Sir Humphry Davy | (iv) | Atomic Theory |
| 1. A water-borne disease | A: Seawater |
| 2. Existence of water between 0°C and 100°C | B: Dysentery |
| 3. Taste in water is due to | C:Liquid state |
| 4. The most impure form of water | D: Dissolved gases and minerals |
| List 1 | List 2 | ||
| 1 | The process which involves oxidation of food substance in living organisms | A | Helium |
| 2 | The component of air which finds application in observation balloons | B | Carbon dioxide |
| 3 | The process which involves oxidation of substances, liberating heat and light energy | C | Respiration |
| 4 | The component of air which is heavier than air and fairly soluble in water | D | Combustion |
| 1. Smallest unit of a compound | a. molecule |
| 2. Sulphur | b. noble gas |
| 3. Helium | c. non-metal |
| 4. A diatomic molecule | d. hydrogen |
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Respiration |
| 2 | The component of air which finds application in observation balloons | B | Sulphur dioxide |
| 3 | The process which involves oxidation of food substance in living organisms | C | Nitrogen |
| 4 | The component of air which is heavier than air and fairly soluble in water | D | Helium |
| Column A | Column B |
| 1. A homogeneous material which contains particles of one kind and has definite properties | (a) Homogeneous mixture. |
| 2. Two or more substance are mixed together in any proportion, such that they do noundergo any chemical change. | (b) Heterogeneous mixture |
| 3. A mixture whose contents are mixed uniformly. | (c) Alloy |
| 4. A homogeneous mixture of molten metals. | (d) Pure substance |
| (e) Mixture |
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Water vapour |
| 2 | The component of air which supports combustion | B | Nitrogen |
| 3 | The inert component in the air slightly soluble in water | C | Oxygen |
| 4 | The component of air which minimizes the rate of evaporation | D | Sulphur dioxide |
| Column A | Column B |
| 1. Oxygen | a. needed for photosynthesis |
| 2. Nitrogen | b. supports combustion |
| 3. Carbon dioxide | c. hydrated iron oxide |
| 4. Water vapour | d. helps in protein synthesis |
| e. determines climatic conditions |
| List I | List II |
| 1. Solid 'X' to a Liquid 'X' | A: Condensation |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Freezing |
| 5. The temperature at which 'Y' changes to 'Z' | F: Boiling point |
| Column A | Column B |
| 1. Coating of clean iron nail with brown powder in moist air | (a) Respiration |
| 2. Conversion of carbon dioxide and water into carbohydrates. | (b) Rusting |
| 3. A specialized cell which helps in the respiration of plants. | (c) Combustion |
| 4. A process in which heat and light energy is released. | (d) Photosynthesis |
| (e) Stomata |