Given below are two statements

Statement I : Primary aliphatic amines react with HNO₂ to give unstable diazonium salts.

Statement II : Primary aromatic amines react with HNO₂ to form diazonium salts which are stable even above 300 K.

In the light of the above statements, choose the most appropriate answer from the options given below.

In one molal solution that contains 0.5 mole of a solute, there is

RMgX + CO₂ $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ether}^{dry}} $$ Y $$\buildrel {{H_3}{O^ + }} \over \longrightarrow $$ RCOOH

What is Y in the above reaction?

Given below are half cell reactions:

$$MnO_4^ - + 8{H^ + } + 5{e^ - } \to M{n^{2 + }} + 4{H_2}O$$,

$$E_{M{n^{2 + }}/MnO_4^ - }^o = - 1.510\,V$$

$${1 \over 2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O$$

$$E_{{O_2}/{H_2}O}^o = + 1.223\,V$$

Will the permanganate ion, $$MnO_4^ - $$ liberate O₂ from water in the presence of an acid?