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 $\mathrm{H}_{2}$.

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