MCQ
Essential constituent of an amalgam is
- AIron
- BAn alkali metal
- CSilver
- ✓Mercury
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Penta acetate of glucose $\xrightarrow[{\operatorname{Re} agent}]{{Tollen's}}$ $+\,ve$ test $(A)$
Penta acetate of glucose $\xrightarrow{{Benedicts}}$ $+\,ve$ test $(B)$
Penta acetate of glucose $\xrightarrow[{\operatorname{Re} agent}]{{Schiffs}}$ $-\,ve$ test $(C)$
Penta acetate of glucose $\xrightarrow{{NaHS{O_3}}}$ $-\,ve$ test $(D)$
$(a)$ The vapour pressure of water at $280 K$ is $14.2$ $mm Hg$
$(b)$ $R =0.082 L$ atm $K ^{-1} mol ^{-1}$