Deuterium resembles hydrogen in properties but :
Question:

Deuterium resembles hydrogen in properties but :

1. reacts slower than hydrogen

2. reacts vigorously than hydrogen

3. reacts just as hydrogen

4. emits $\beta^{+}$particles

Correct Option: 1

Solution:

The bond dissociation energy of $\mathrm{D}_{2}$ is greater than $\mathrm{H}_{2}$ and therefore $\mathrm{D}_{2}$ reacts slower than $\mathrm{H}_{2}$.