MCQs
Total Questions : 137
| Page 11 of 14 pages
Answer: Option A. -> Both A and R are true and R is the correct explanation of A
:
A
Option:(a)
:
A
Option:(a)
Answer: Option A. -> (a), (c), (b), (d)
:
A
Option:(a)
:
A
Option:(a)
Answer: Option A. -> Both A and R are true and R is the correct explanation of A
:
A
Option:(a)
:
A
Option:(a)
Question 104. The noble gases are a group of chemical elements with very similar properties. The six noble gases that occur naturally are helium (He), neon (Ne),argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).The noble gases are:
(a) Mono atomic, colorless and odorless
(b) diatomic, colorless and odorless
(c) have very low chemical reactivity
(a) Mono atomic, colorless and odorless
(b) diatomic, colorless and odorless
(c) have very low chemical reactivity
Answer: Option B. -> (a) and (c)
:
B
Option:(b)
:
B
Option:(b)
Answer: Option B. -> (b) and (c)
:
B
Option:(b)
:
B
Option:(b)
Question 106. Radioactivity is the random spontaneous disintegration of an atom of an element. The stability of the nucleus depends on the relative numbers of protons and neutrons present. Radioactive disintegration is an example of
(a) a first order reaction
(b) a reaction that obeys rate law
(c) a second order reaction
(a) a first order reaction
(b) a reaction that obeys rate law
(c) a second order reaction
Answer: Option A. -> (a) and (b)
:
A
Option:(a)
:
A
Option:(a)
Answer: Option D. -> (a), (c), (d) ,(b)
:
D
Option:(d)
:
D
Option:(d)
Answer: Option C. -> A is true but R is false
:
C
Option: (c)
:
C
Option: (c)
Answer: Option B. -> 3 4 2 1
:
B
Option:(b)
:
B
Option:(b)
Answer: Option C. -> Strontium and barium
:
C
Option:(c)
:
C
Option:(c)