A bulb is rated at 150 watt, converting $8 \%$ energy into light. If energy of one photon is $4.42 \times 10^{-19} \mathrm{~J}$, how many photons are emitted by the bulb per second?
$2.71 \times 10^{19}$
$4.06 \times 10^{19}$
$27.2 \times 10^{19}$
$1.35 \times 10^{19}$
Methane reacts with steam at 1273 K in the presence of nickel catalyst to form :
CO and $\mathrm{H}_2 \mathrm{O}$
$ \mathrm{CO}_2$ and $\mathrm{H}_2$
$ \mathrm{CO}$ and $\mathrm{H}_2$
$ \mathrm{CO}_2$ and $\mathrm{H}_2 \mathrm{O}$
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
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