Observe the following statements 1. Heavy water is harmful for the growth of animals. 2. Heavy water reacts…
Observe the following statements
1. Heavy water is harmful for the growth of animals.
2. Heavy water reacts with $\mathrm{Al}_4 \mathrm{C}_3$ and forms deuterated acetylene.
3. $\mathrm{BaCl}_2 \cdot 2 \mathrm{D}_2 \mathrm{O}$ is an example of interstitial deuterate.
The correct statements are
1 and 3
1 and 2
1,2 and 3
2 and 3
Solution
(a) Heavy water is injurous to human beings, plants and animals since it slows down the rates of reactions occuring in them.
(b) Heavy water reacts with aluminium carbide forming deuteromethane.
$
\begin{array}{ll}
\underset{\substack{\text { aluminium } \\
\text { carbide }}}{\mathrm{Al}_4 \mathrm{C}_3}+12 \mathrm{D}_2 \mathrm{O} \longrightarrow & 4 \mathrm{Al}(\mathrm{OD})_3 \\
& +\underset{\text { deuteromethane }}{\mathrm{CD}_4}
\end{array}
$
(c) In interstitial hydrates or deuterates, water molecules are present in interstitial sites or voids in the crystal lattice. e.g., $\mathrm{BaCl}_2 \cdot 2 \mathrm{H}_2 \mathrm{O}$ and similarly $\mathrm{BaCl}_2 \cdot 2 \mathrm{D}_2 \mathrm{O}$ are interstitial compounds