1. Which of the following is not a physical change? (A) Boiling of water to give water vapour (B) Melting of ice to give water (C) Dissolution of salt in water (D) Combustion of Liquefied Petroleum Gas (LPG)
2. Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberatedduring electrolysis of water is (A) 1:1 (B) 2:1 (C) 4:1 (D) 1:2
3. What happens when a solution of an acid is mixed with a solution of a base in a test tube? (i) The temperature of the solution increases (ii) The temperature of the solution decreases (iii)The temperature of the solution remains the same (iv)Salt formation takes place
(A)(i) only (B) ( i) and (iii ) (C) (ii) and (iii) (D) ( i) and (iv )
4. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (A)Baking powder (B)Lime (C)Ammonium hydroxide solution (D)Hydrochloric acid
5. Which of the following salts does not contain water of crystallisation? (A) Blue vitriol (B) Baking soda (C) Washing soda (D) Gypsum
6. Which of the following property is generally not shown by metals? (A) Electrical conduction (B) Sonorous in nature (C) Dullness (D) Ductility
7. The ability of metals to be drawn into thin wire is known as (A) ductility (B) malleability (C) sonority (D) conductivity
8. Which one of the following metals do not react with cold as well as hot water? (A) Na (B) Ca (C) Mg (D) Fe
9. Name the below compound from its structure: (A) Ethane (B) Ethanol (C) Ethene (D) Propanol
10. Buckminsterfullerene has ______________ atoms in its molecule. (A) 30 (B) 960 (C) 300 (D) 60
11. Which change occurs in the respiratory rate due to the construction of the diaphragm and rib muscles? (A) Increases (B) Decreases (C) Remain the same (D) None of the above
12. The kidneys in human beings are a part of the system for (A) Nutrition (B) Respiration (C) Excretion (D) Transportation
13. The breakdown of pyruvate to give carbon-dioxide, water and energy take place in (A) Cytoplasm (B) Mitochondria (C) chloroplast (D) Nucleus
14. Electrical impulse travels in a neuron from (A) Dendrite→ axon→ axonal end→ cell body (B) Cell body→ Dendrite → axon→ axonal end (C) Dendrite →Cell body→ axon→ axonal end (D) Axonal end→ axon → Cell body→ Dendrite
15. Posture and balance of the body is control by (A) Cerebrum (B) Cerebellum (C) Medulla oblongata (D) Pons
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