Question

Hydrogen combines with chlorine to form HCI. It also combines with sodium to form NaH. If sodium and chlorine also combine with each other, they will do so in the ratio of their masses as:

• A. 23 : 35.5
• B. 35.5 :23
• C. 1 : 1
• D. 23 : 1

Answer 1

The correct option is A 23 : 35.5

Since, mass ratio of $H:Cl=1:35.5$ in HCl and $Na:H=23:1$ in NaH.
And since according to law of constant proportion compounds always contains its elements in a fixed ratio by mass.
So, for$\text{1gm of H}$ we are having$\text{35.5gm Cl and 23gm Na.}$
Hence, the ratio $Na:Cl=23:35.5$.
Hence, the answer is option A.