TS EAMCET · Chemistry · Hydrogen
Identify the correct statements about the hydrides. (I) In saline hydrides oxidation state of hydrogen is +1 (II) \(\mathrm{La} \mathrm{H}\) is an example of interstitial hydride (III) \(\mathrm{NH}_3, \mathrm{H}_2 \mathrm{O}\) have the tendency to form hydrogen bonds (IV)Electrolysis of molten sodium hydride liberates \(\mathrm{H}_2\) gas at cathode \(\Rightarrow \mathrm{K}_{\mathrm{c}}=\frac{(0.5)(0.5)}{(0.5)(0.5)}=1.0\)
- A I \& II only
- B I \& IV only
- C II \& IV only
- D II \& III only
Answer & Solution
Correct Answer
(D) II \& III only
Step-by-step Solution
Detailed explanation
Statement (I) is incorrect because saline or ionic hydrides have the hydrogen atom in -1 oxidation state. Statement (IV) is incorrect because at cathode, reduction of \(\mathrm{Na}^{+}\)to \(\mathrm{Na}\) takes place while hydrogen gas is liberated at the anode.
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