set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on classification of elements, chemical bonding, periodicity in properties & physical transformation topic of general science mcq
(a) Polonium
(b) Promethium
(c) Plutonium
(d) Palladium
The correct answers to the above question in:
Answer: (c)
Practice classification of elements, chemical bonding, periodicity in properties & physical transformation (set 2) Online Quiz
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Read more chemistry Based General Science Questions and Answers
Question : 1
Consider the following statements :
- 22gm. of $CO_2$ consist of 1 mole.
- Number of molecules in 4 gm of oxygen is $10^22$.
- Mass of 1 mole of a substance is called its formula mass.
a) 1 and 3
b) 1 and 2
c) 2 and 3
d) 1, 2 and 3
Answer »Answer: (d)
1 mole of CO2 = 44g Mass of 1 mole of a substance is called molar mass.
Question : 2
Pasteurization is related to
a) Dehydration of milk
b) Fermentation of milk
c) Sterilization of milk
d) Distillation of milk
Answer »Answer: (c)
Question : 3
The difference between a nuclear reactor and atomic bomb is that
a) the chain reaction in nuclear reactor is not controlled.
b) no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction.
c) the chain reaction in nuclear reactor is controlled.
d) no chain reaction takes place in atomic bomb while it takes place in nuclear reactor.
Answer »Answer: (c)
There are two main fundamental differences between the design of an atomic bomb and the design of a nuclear reactor.
One difference is the way the fission reactions are controlled and the second difference stems from the enrichment of the fuel.
Question : 4
The number of elements in the third period of periodic table is
a) 8
b) 18
c) 2
d) 32
Answer »Answer: (a)
Question : 5
Most of the explosions in mines occur due to the mixing of
a) oxygen with acetylene
b) methane with air
c) hydrogen with oxygen
d) carbon dioxide with ethane
Answer »Answer: (a)
Question : 6
Elements of which group form anions most readily?
a) Nitrogen family
b) Halogens
c) Oxygen family
d) Alkali metals
Answer »Answer: (b)
Halogens are the most electronegative elements.
i.e., they are likely to form anions most readily.
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