The isostructural pairs among the following are:

1. C and D only
2. A and B only
3. A and C only
4. B and C only

In $\stackrel{1}{\mathrm{C}}{\mathrm{H}}_2=\stackrel{2}{\mathrm{C}}=\stackrel{3}{\mathrm{C}}\mathrm{H}-\stackrel{4}{\mathrm{C}}{\mathrm{H}}_3$ molecule, the hybridization of carbon 1,2,3 and 4 respectively are :

1. ${\mathrm{sp}}^3,\mathrm{sp},{\mathrm{sp}}^3,{\mathrm{sp}}^3$

2. ${\mathrm{sp}}^2,{\mathrm{sp}}^2,{\mathrm{sp}}^2,{\mathrm{sp}}^3$

3. ${\mathrm{sp}}^2,\mathrm{sp},{\mathrm{sp}}^2,{\mathrm{sp}}^3$

4. ${\mathrm{sp}}^2,{\mathrm{sp}}^3,{\mathrm{sp}}^2,{\mathrm{sp}}^3$

Which pair of oxides are acidic in nature?

1. ${\mathrm{B}}_2{\mathrm{O}}_3, \mathrm{CaO}$

2. ${\mathrm{B}}_2{\mathrm{O}}_3, {\mathrm{SiO}}_2$

3. ${\mathrm{N}}_2\mathrm{O}, \mathrm{BaO}$

4. $\mathrm{CaO}, {\mathrm{SiO}}_2$

Match List-I (Molecules) with List-II (Bond order),
and mark the appropriate choice

Choose the correct match from the options given below :

1. (a) $\to$ (iii), (b) $\to$ (iv), (c) $\to$ (i), (d) $\to$ (ii)

2. (a) $\to$ (i), (b) $\to$ (ii), (c) $\to$ (iii), (d) $\to$ (iv)

3. (a) $\to$ (ii), (b) $\to$ (i), (c) $\to$ (iv), (d) $\to$ (iii)

4. (a) $\to$ (iv), (b) $\to$ (iii), (c) $\to$ (ii), (d) $\to$ (i)

The shape/structure of [XeF₅]^– and XeO₃F₂, respectively, are :

1. Pentagonal planar and trigonal bipyramidal

2. Trigonal bipyramidal and pentagonal planar

3. Octahedral and square pyramidal

4. Trigonal bipyramidal and trigonal bipyramidal

Of the species, NO , NO⁺, NO²⁺ and NO^– , the one with minimum bond strength is: 

1.  NO²⁺

2.  NO⁺

3.  NO 

4.  NO^–