MCQ
False statement is
- AChloroform is heavier than water
- B$B{r^ - }$ is a good nucleophile as compared to ${I^ - }$
- CVinyl chloride is more reactive than allyl chloride
- ✓Both $(b)$ and $(c)$
Order of nucleophilicity amongst the halide ion are as ${I^ - } > B{r^ - } > C{l^ - }$.
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(Given: specific rotations of ($+$)-sucrose, ($+$)-maltose, $L$-($-$)-glucose anc. $+(+)$-fructose in aqueous solution are $+66^{\circ},+140^{\circ},-52^{\circ}$ and $+92^{\circ}$, respectively)
($A$) 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
($B$) . 'invert sugar' is an equimolar mixture of $D$-($+$)-glucose and $D$-($-$)-fructose
($C$) specific rotation of 'invert sugar' is $-20^{\circ}$
($D$) on reaction with $\mathrm{Br}_2$ water, 'invert sugar' forms saccharic acid as one of the products
$(a)$ Hydrogen gas is released at cathode
$(b)$ Oxygen gas is released at anode.
$(c)$ $pOH$ of solution decreases
$(d)$ There is deposition of potassium at cathode
Choose the correct option from following
$Pt(s) |H_2(g)\,|\,HCOOH(aq.)\,||\,CH_3COOH(aq.)\,|\,H_2(g)|Pt(s)$
at $25\,^o C$ is ............ $\mathrm{V}$
$(K_a$ of $HCOOH \,= 2.4 × 10^{-4}$ , $K_a$ of $CH_3COOH = 1.8 × 10^{-5}$ , $log\,2\, = 0.3,\, log \,0.48, \frac{2.303 \times 298 \times R}{F} = 0.06)$