The number of radial nodes in $4 s$ and $3 p$ orbitals respectively is
2 and 0
3 and 1
1 and 0
2 and 1
The activation energy for a reaction is $9.0 \mathrm{kcal} / \mathrm{mol}$. The increase in the rate constant when the temperature is increased from 298 K to 308 K is
$10 \%$
$100 \%$
$50 \%$
$64 \%$
6.35 g of copper (Atomic mass $=635 \mathrm{u}$ ) is deposited at the cathode from a $\mathrm{Cu}^{2+}$ solution using a certain quantity of electric charge.
The volume of oxygen gas liberated at STP from water electrolysis using the same quantity of electric charge is
5.6 L
11.2 L
1.12 L
2.8 L
When $\mathrm{H}_2 \mathrm{O}_2$ is added to a solution of acidified sodium dichromate, a deep blue colour is observed due to the formation of a peroxo complex. This change signifies that
dichromate ion is oxidised.
hydrogen peroxide is reduced.
oxidation state of Cr remains same.
hydrogen peroxide acts as an oxidising agent.
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