1. A hydrocarbon contains 86 % carbon, 448 ml of the hydrocarbon weighs 1.68 π of STP. Then the hydrocarbon is
(a) ALKENE
(b) ALKANE
(c) ALKYNE
(d) ARENE
Answer: (a)
2. When a solution of a metal salt is treated with ammonia solution, a white precipitate is formed which is insoluble in excess of ammonia. When same solution is treated with NaOH, a white precipitate is formed which dissolves in excess of NaOH. The cation is
Answer: (c)
3. What is the solubility product of lead iodide at 25°πΆ? Its solubility at that temperature is 0.7 π/π, atomic weight of Pb=207.2 and I=127.
Answer: (b)
4. The diameter measured under various trials for a wire using a microscope were 0.205 πm, 0.209 πm and 0.198 πm. If the known diameter is 
, the percentage of error for an average measurement is
, the percentage of error for an average measurement is(a) 1.8 %
(b) 3.5 %
(c) 2.4 %
(d) 2.0 %
Answer: (d)
5. Which one of following is the correct sequence in decreasing order of the dielectric constants?
(a) Sulfuric acid > water > ethanol > decane
(b) Water >sulfuric acid > ethanol > decane
(c) Water >sulfuric acid > decane > ethanol
(d) Sulfuric acid > ethanol > water > decane
Answer: (a)
6. Which one of the following is having isotonic nuclei?
Answer: (c)
7. When a stream of electrons strikes a metal target, the resulting radiation is
(a) πΎ− Rays
(b) Electron reemission
(c) π− Rays
(d) Neutrons
Answer: (c)
8. Which of the following set of quantum numbers are possible?
1. π = 3, π = 0, π = 0 and π =+1/2
2. π = 3, π = 1, π = −1 and π = −1/2
3. π = 2, π = 0, π = −1 and π = +1/2
4. π = 2, π = 1, π = 0 and π = +1/2
(a) 1, 2 and 3
(b) 1, 3 and 4
(c) 1, 2 and 4
(d) 2, 3 and 4
Answer: (c)
9. The pH , at which the amino acid is in the dipolar form is known as:
(a) Isoelectric point
(b) Isosbestic point
(c) Mutarotation
(d) Transition point
Answer: (a)
10. The following two isomers are:
(a) Enantiomers
(b) Mesomers
(c) Diastereomers
(d) Position isomers
Answer: (c)