classification of elements, chemical bonding, periodicity in properties & physical transformation - Category wise Question and Answer Practice Test with Solutions

Question : 16

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.

Question : 17

Which of these choices is not a family of elements?

a) Metals

b) Inert gases

c) Halogens

d) All of these

Question : 18 [CDS]

Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the periodic table?

a) Valency

b) Radioactivity

c) Atomic size

d) Electronegativity

Question : 19

Match List-I with List-II:

a) A – (1), B – (3), C – (4), D – (2)

b) A – (3), B – (1), C – (2), D – (4)

c) A – (3), B – (4), C – (1), D – (2)

d) A – (3), B – (1), C – (4), D – (2)

Question : 20 [NDA]

Consider the following statements:

1. Maximum covalency of carbon is 4, whereas maximum covalency of silicon is 6.
2. The maximum covalency of an element is limited to 6.

a) 2 only

b) Both 1 and 2

c) 1 only

d) Neither 1 nor 2