How long should water be electrolysed using 50 A current to release enough $\mathrm{H}_2$ gas to completely reduce 8.0 g of CuO ?
$\left(\mathrm{CuO}+\mathrm{H}_2 \longrightarrow \mathrm{Cu}+\mathrm{H}_2 \mathrm{O}\right.$; Atomic mass of $\mathrm{Cu}=635 \mathrm{u}$ )
1600 s
1930 s
2415 s
1280 s
$$ \text { Match List-I with List-II. } $$
| List I (Mixture) |
List II (Distinguishing test) |
||
|---|---|---|---|
| A. | Ethanal, propanone | I. | Brady's reagent |
| B. | Benzaldehyde, acetophenone | II. | Tollen's reagent |
| C. | Phenol, aniline | III. | Neutral $\mathrm{FeCl}_3$ |
| D. | Cyclohexene, cyclohexane | IV. | Baeyer's reagent |
Choose the correct match from the options given below
A-I, B-II, C-III, D-IV
A-II, B-I, C-IV, D-III
A-III, B-I, C-II, D-IV
A-II, B-IV, C-I, D-III
How many moles of $\mathrm{KMnO}_4$ are required to oxidise 1 mole of oxalic acid in acidic medium?
0.5 mol
0.25 mol
0.4 mol
0.1 mol
Which of the following complexes can show both facial ( $f a c$ ) and meridional (mer) isomerism?
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$
$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{Cl}_3\right]$
$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
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