4HCl + O₂ →  X + 2H₂O

Cl₂ + H₂O → HCl  + Y ;

X and Y in the above reaction are respectively:

1.  Cl₂ , HOCl

2. HOCl ,Cl₂

3. HClO₃, HOCl

4. HOCl, HClO₄

A neutral molecule that is isoelectronic with ClO^- is -

1. ClF which is a Lewis base

2. ClF which is a Lewis acid

3. HCl which is a Lewis base

4. HCl which is a Lewis acid

The correct statement(s) regarding group 15 elements is(are):

The main product(s) formed in the given reaction is/are:

${\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{aq}\right)+{\mathrm{NaNO}}_2\left(\mathrm{aq}\right)\to ....+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+\mathrm{NaCl}\left(\mathrm{aq}\right)$

$1. {\mathrm{NH}}_3$
$2. {\mathrm{N}}_2$
$3. {\mathrm{N}}_2{\mathrm{H}}_4$
$4. \mathrm{Both} \left(1\right)\hspace{0.17em}\mathrm{and}\left(3\right)$

The correct statement(s) among the given options is/are:

Oxygen exists as gas and sulphur exists as a solid because:
1. Oxygen is less electronegative than sulphur.

2. Sulphur is smaller than oxygen molecule.

3. Sulphur has a tendency to form pπ-pπ bonds.

4. Oxygen has a tendency to form pπ-pπ bonds.

The products formed by the reaction of F₂ and Cl₂ with water respectively are:

1. HF , HCl

2. H₂F₂ , HOCl

3. HF, HClO₃

4. H₂F₂, HClO₄

NaCl when heated with sulphuric acid in the presence of ${\mathrm{MnO}}_2$, gives:

1. MnO

2. MnCl₂

3. Cl₂

4. Both (2) and (3)