Question

Given below are the uses of three compounds. Choose the correct option depicting the atomicity of these compounds.

• A.
  X=2; Y=4; Z=2
• B.
  X=2; Y=3; Z=2
• C.
  X=2; Y=3; Z=1
• D.
  X=2; Y=5; Z=3

Answer 1

The correct option is D

X=2; Y=5; Z=3

• NaCl is used in cooking and preserving food; it is also known as table salt. It contains one sodium atom and one chlorine atom. So, the atomicity is two. The value of X is 2.

• ${\mathrm{CaCO}}_3$ is used for flooring purposes and it is also called marble. It contains one calcium atom , one carbon atom and three atoms of oxygen. So the atomicity is 5.

• Carbon dioxide is used in aerated drinks. It contains one carbon atom and two oxygen atoms. So, the atomicity is 3.