Question

Molecular weight of water is $20$ u.

• A. True
• B. False

Answer 1

The correct option is B False

Molecular formula of water is $H_{2}O$
Atomic weight of $H$ is $1$ u and of $O$ is $16$ u
Molecular weight of water =
$2\times massofH+1\times massofO$
$2\times 1+16=18$ u
Therefore, option $B$ is correct.