Amarnath Mishra, Geeta Mehta, Deepti Lehri and, Rajesh Mohan Solutions for Chapter: The Language of Chemistry, Exercise 1: Exercises

The valencies of the two elements of a binary compound are _____ to obtain its formula. (added / transposed)

Atoms are neither lost nor _____ in chemical reaction. (gained/ reacted)

The valency of hydrogen is $1$.

The valency of oxygen is $2$.

The symbol of iron is I.

The symbol of silver is $\mathrm{A}\mathrm{g}$.

The valency of calcium is 2 and that of chlorine is 1. So, calcium chloride is $\mathrm{C}{\mathrm{a}}_2\mathrm{Cl}$.

The valency of both zinc and oxygen is $2$. So, zinc oxide is $\mathrm{Z}\mathrm{n}\mathrm{O}.$