The correct order of $\mathrm{S}—\mathrm{S}$ bond length in the following oxyanion is :

(I) ${\mathrm{S}}_2{\mathrm{O}}_4^{2-}$                  (II) ${\mathrm{S}}_2{\mathrm{O}}_5^{2-}$                      (III) ${\mathrm{S}}_2{\mathrm{O}}_6^{2-}$

(a) I$>$II$>$III                                      (b) I$>$III$>$II

(c) III$>$II$>$I                                       (d) III$>$I$>$II

Consider the following statements in respect of oxides of sulphur.

(1) In gas phase ${\mathrm{SO}}_2$ molecule is V-shape.

(2) In gas phase ${\mathrm{SO}}_3$ molecule is planar.

(3) $\mathrm{y}‐{\mathrm{SO}}_3$ is cyclic trimer.

Which of the above statements are correct ?

(1) 1 and 2 only                             

(2) 2 and 3 only

(3) 1 and 3 only                             

(4) 1, 2 and 3

The gas that cannot be collected over water is:

1. ${\mathrm{N}}_2$                                   

2. ${\mathrm{O}}_2$

3. ${\mathrm{SO}}_2$                                 

4. ${\mathrm{PH}}_3$

One gas bleaches the colour of flowers by reduction, while the other gas bleaches by oxidation. The two gases, respectively, are:

1. $\mathrm{CO}$ $\mathrm{and}$ ${\mathrm{Cl}}_2$                             

2. ${\mathrm{H}}_2\mathrm{S}$ $\mathrm{and}$ ${\mathrm{Br}}_2$

3. ${\mathrm{NH}}_3$ $\mathrm{and}$ ${\mathrm{SO}}_3$                           

4. ${\mathrm{SO}}_2$ $\mathrm{and}$ ${\mathrm{Cl}}_2$

Which of the following halides cannot be hydrolysed at room temperature?

  $\left(\mathrm{I}\right) {\mathrm{TeF}}_6 \left(\mathrm{II}\right) {\mathrm{SF}}_6 \left(\mathrm{III}\right) {\mathrm{NCl}}_3 \left(\mathrm{IV}\right) {\mathrm{NF}}_3$

(1) $\mathrm{III} \mathrm{and} \mathrm{IV}$                               

(2) $\mathrm{I}, \mathrm{II} \mathrm{and} \mathrm{III}$

(3) $\mathrm{I}, \mathrm{II} \mathrm{and} \mathrm{IV}$                             

(4) $\mathrm{II} \mathrm{and} \mathrm{IV}$

Which parent oxy acid does not have its own hypo acid?

1. H₂SO₂                                  
2. HNO₂                                            
3. H₃PO₃                                        
4. HClO₃

Consider the following reactions :

$\left(\mathrm{i}\right) {\mathrm{PCl}}_3+3{\mathrm{H}}_2\mathrm{O}\stackrel{}{\to }{\mathrm{H}}_3{\mathrm{PO}}_3+3\mathrm{HCl}$
(ii) SF4+3H2O→H2SO3+4HF

$\left(\mathrm{iii}\right) {\mathrm{BCl}}_3+3{\mathrm{H}}_2\mathrm{O}\stackrel{}{\to }{\mathrm{H}}_3{\mathrm{BO}}_3+3\mathrm{HCl}$
(iv) XeF6+3H2O→XeO3+6HF

Then according to given information the incorrect statement is :

(1) During the (i) reaction the hybridisation of 15th group element does not 

      changed

(2) During the (ii) reaction the hybridisation of 16th group element 

      changed

(3) During the (iii) reaction the hybridisation of 13th group element does not 

      changed

(4) During the (iv) reaction the hybridisation of 18th group element does not 

      changed

Consider the oxy acids ${\mathrm{HClO}}_{\mathrm{n}}$ series, here value of n is 1 to 4. Then incorrect statement regarding these oxy acids is :

(1) Acidic character of oxy acids increases with increasing value of n.

(2) oxidising power of oxy acids increases with decreasing value of n.

(3) Thermal stability of oxy acids decreases with increasing value of n.

(4) $\text{'}\mathrm{Cl}—\mathrm{O}\text{'}$ bond order decreases with decreasing value of n  

The correct statement regarding ${\mathrm{CIO}}_n^{‐}$ molecular ion is :

(1) On decreasing value of $\text{'}\mathrm{n}\text{'}, \text{'}\mathrm{Cl}—\mathrm{O}\text{'}$ bond order increases 

(2) On the increasing value of $\text{'}\mathrm{n}\text{'}, \text{'}\mathrm{Cl}—\mathrm{O}\text{'}$ bond length increases

(3) On the increasing value of $\mathrm{n},$ oxidation number of central atom increases 

(4) On the increasing value of  $\mathrm{n},$ hybrid orbitals on the central atom increase

$\mathrm{In}, {\mathrm{Cl}}_2{\mathrm{O}}_6\left(\mathrm{l}\right)+\mathrm{HF} \underset{}{\to } \mathrm{P}+\mathrm{Q}$

$\mathrm{If} {\mathrm{H}}^{+} \mathrm{of} \mathrm{acid} \mathrm{HF} \mathrm{attaches} \mathrm{with} \mathrm{Q} \mathrm{then} \mathrm{correct} \mathrm{option} \mathrm{for} \mathrm{hybrization} \mathrm{of} \mathrm{Cl}-\mathrm{atom}$

$\mathrm{and} \angle \mathrm{OCIO} \mathrm{in} \mathrm{the} \mathrm{P} \mathrm{and} \mathrm{Q} \mathrm{ions} :$

$\left(\mathrm{a}\right) P\mathbf{:}s{p}^{\mathit{2}};>120°$

$\left(\mathrm{b}\right) Q\mathbf{:}s{p}^3; 109°28\text{'}$

$\left(\mathrm{c}\right) P\mathbf{:}s{p}^3;<109°28\text{'}$

$\left(\mathrm{d}\right) Q\mathbf{:}s{p}^3;>109°28\text{'}$