Objective Questions on Carbon and its compounds
21-Unsaturated carbon compounds will give a
(A) yellow flame
(B) clean flame
(C) red flame
(D) none of the above
22-Coal is the remains of
(A) trees
(B) ferns
(C) plants
(D) all of the above
23- ___ are substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected.
(A) Catalysts
(B) fatty acids
(C) saturated compounds
(D) none of the above
24- Oils containing ___ should be chosen for cooking.
(A) saturated fatty acids
(B) unsaturated fatty acids
(C) alcohol
(D) ketones
25-Ethanol is
(A) a liquid at room temperature
(B) commonly called alcohol
(C) a good solvent
(D) all of the above
26-Alcohols react with sodium leading to the evolution of
(A) hydrogen
(B) oxygen
(C) carbon dioxide
(D) all of the above
27-Ethanol can be produced from
(A) Sugarcane
(B) Rose
(C) Sunflower
(D) All of the above
28-Ethonic acid is commonly called
(A) Nitric acid
(B) Sulphuric acid
(C) Acetic acid
(D) Hydrochloric acid
29-Acetic acid is used as
(A) cough syrup
(B) preservative
(C) fuel
(D) all of the above
30- Ethanoic acid reacts with absolute ethanol in the presence of an acid catalyst to give an
(A) ether
(B) ester
(C) ethene
(D) none of the above
ANSWERS:
21-(A), 22-(D), 23-(A), 24-(B), 25-(D), 26-(A), 27-(A), 28-(C), 29-(B), 30-(B)