Carbon Compound and Petroleum Worksheet-1

Carbon Compound and Petroleum Worksheet-1

1. Photosynthesis is the nature’s way of making food by itself, which is the source of all energy. What is the percentage of gas in atmospheric air, which is used by the plants in making food (photosynthesis)?

(a) 23.1 %          (b) 0.03 %         (c) 24.4 %          (d) 75.5 %

2. The allotropes of carbon can be differentiated on the basis of crystalline and amorphous forms. Which allotropic form of Carbon is used in making jewellery?

(a) Silver            (b) Gold             (c) Diamond     (d) Platinum

3. The allotropic form of carbon known as the Buckminster’s Fullerene was discovered in 1990.

(a) C₇₀ molecule                            (b) C₆₀ molecule

(c) C₅₀ molecule                            (d) C₄₀ molecule

4. Which form of Charcoal (a form of carbon) is used to remove colour from a sugar cane?

(a) Sugar           (b) Wood           (c) Bone             (d) None

5. Lamp Black, which is an amorphous form of carbon is not used in the manufacture of:

(a) Black shoe polish                   (b) Water Gas

(c) Black carbon paper               (d) Electrodes for dry cell

6. C + H₂O (steam) is passed over red hot coke to produce:

(a) CO₂ + H₂     (b) CO + O₂       (c) CO + H₂       (d) O₂ + H₂ + C

7. Enercon, Suzlon are the MNC’s engaged in the production of renewable energy in India. Which of the following is not a renewable source of energy?

(a) Coal              (b) Wind            (c) Solar             (d) Agriculture waste

8. Candle is composed of wax, which is regarded as a hydrocarbon. Why should we not light a candle in a closed room with people?

(a) The CO₂ formed cause’s breathlessness.

(b) Carbon particles are formed which are dangerous for respiratory tract.

(c) Methane (CH₄), which is poisonous is formed.

(d) CO is formed, which reduces the ability of blood to carry O₂

9. Fire extinguishers are classified as A,B,C types depending on the type of fire to be extinguished . Which of the following substance is used in place of H₂SO₄ in foam-type fire extinguishers?

(a) Saponin                                    (b) Sodium Carbonate

(c) Aluminium Sulphate             (d) Alcohol

10. Reckitt and Coleman are makers of the Cherry Shoe polish. Why do black shoe polishes have an oily feel?

(a) Shoe polishes is a mixture of oil and powdered graphite

(b) On exposure to air, these undergo chemical changes and produce oily substance

(c) Vapour of some amount of oil is left over, after its preparation

(d) These are formed by dissolving charcoal in oil

Answer Key:

(1)-(b); (2)-(c); (3)-(b); (4)-(c); (5)-(d); (6)-(c); (7)-(a); (8)-(d); (9)-(c); (10)-(c)