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chemistry mcq with answers
MULTIPLE CHOICE QUESTIONS IN CHEMISTRY
Chemistry Test and Chemistry Quiz
1. A solution has H ion concentration 0.0005 M. Its pOH is
(a) 8.279
(b) 12.285
(c) 10.699
(d) 13.335
Ans. (c)2. 75% of a first order reaction was completed in 32 min when was 50% of the reaction
Completed?
(a) 24 min
(b) 16 min
(c) 8 min
(d) 48 min Ans. (b)3. Cyano benzene has
(a) 7 sigma bonds and 4 pi bonds
(b) 7 sigma and 5 pi bonds
(c) 12 sigma and 6 pi bonds
(d) 13 sigma and 5 pi bonds
Ans. (d)4. The rate of diffusion of methane at a given temperature is twice that of a gas X. The molecular mass of X is
(a) 4.0
(b) 8.0
(c) 32.0
(d) 64.0
Ans. (a)5. When phosphorus reacts with caustic soda, the products are PH3 and NaH2PO2. This reaction is an example of
(a) Oxidation
(b) Reduction
(c)...
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