Compound $\mathrm{P}\left(\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}\right)$ gives a red orange precipitate with 2,4-DNP reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid, $P$ gives an aromatic product $Q$ that produces effervescence on treating with aq. $\mathrm{NaHCO}_3$. Compounds P and Q , respectively, are :




$$ \text { Match List I with List II : } $$
| List-I |
List-II |
||
|---|---|---|---|
| A. | $\mathrm{C}_2 \mathrm{H}_4$ | I. | $3 \sigma$ bonds, $2 \pi$ bonds |
| B. | $\mathrm{C}_2 \mathrm{H}_2$ | II. | $3 \sigma$ bonds, one lone pair |
| C. | $\mathrm{CH}_4$ | III. | $4 \sigma$ bonds |
| D. | $\mathrm{NH}_3$ | IV. | $5 \sigma$ bonds, $1 \pi$ bond |
A-III, B-IV, C-II, D-I
A-IV, B-I, C-III, D-II
A-I, B-II, C-IV, D-III
A-II, B-III, C-I, D-IV
$$ \begin{aligned} &\text { The following two reactions give the same foul smelling product } Z \text {. }\\ &\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl} \xrightarrow{\mathrm{X}} \mathrm{Z} \end{aligned} $$

$X$ and $Z$, respectively, are :
$\mathrm{X}=\mathrm{AgCN} ; \mathrm{Z}=\mathrm{C}_2 \mathrm{H}_5 \mathrm{NC}$
$\mathrm{X}=\mathrm{KCN} ; \mathrm{Z}=\mathrm{C}_2 \mathrm{H}_5 \mathrm{CN}$
$\mathrm{X}=\mathrm{AgCN} ; \mathrm{Z}=\mathrm{C}_2 \mathrm{H}_5 \mathrm{CN}$
$\mathrm{X}=\mathrm{KCN} ; \mathrm{Z}=\mathrm{C}_2 \mathrm{H}_5 \mathrm{NC}$
The number of hydrogen atoms present in 5.4 g of urea is:
(Given: Molar mass of urea : $60 \mathrm{~g} \mathrm{~mol}^{-1}$
$\mathrm{N}_{\mathrm{A}}: 6.022 \times 10^{23}$ particles $\mathrm{mol}^{-1}$ )
$1.084 \times 10^{23}$
$1.084 \times 10^{22}$
$2.168 \times 10^{22}$
$2.168 \times 10^{23}$
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