The correct order of catenation is :

1. C > > Sn > Si $\approx$ Ge

2. Si > Sn > C > Ge

3. C > > Si > Ge $\approx$ Sn

4. Ge > Sn > Si > C

The correct statements among I to III regarding group 13 element oxides are:
(I) Boron trioxide or diboron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
1. (I) and (II) only
2. (I) and (III) only
3. (II) and (III) only
4. (I), (II), and (III) only

In view of the signs of ${∆}_{\mathrm{r}}\mathrm{G}°$ for the following reactions:

$\begin{array}{l}{\mathrm{PbO}}_2+\mathrm{Pb}\to 2\mathrm{PbO},{\mathrm{\Delta }}_{\mathrm{r}}{\mathrm{G}}^{\circ }<0\\ {\mathrm{SnO}}_2+\mathrm{Sn}\to 2\mathrm{SnO},{\mathrm{\Delta }}_{\mathrm{r}}{\mathrm{G}}^{\circ }>0\end{array}$

The oxidation states more characteristic for lead and tin are respectively:

1. For lead +2, for tin +2

2. For lead +4, for tin +4

3. For lead +2, for tin +4

4. For lead +4, for tin +2 

Diborane ($B_2{H}_6$) reacts independently with $O_2$ and $H_{2}O$ to produce, respectively:

1.  $H_{3}B{O}_3<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>B_2{O}_3$
2. $B_2{O}_3<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>H_{3}B{O}_3<mspace\; width="1em"></mspace>$
3. $B_2{O}_3<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>{\left[B{H}_4\right]}^{-}$
4. $HB{O}_2<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>H_{3}B{O}_3<mspace\; width="1em"></mspace>$

In the structure of silicon dioxide:

The C–C bond length is maximum in:

1. C₆₀

2. Diamond

3. Graphite

4. C₇₀

The number of pentagons in C₆₀ and trigons (triangles) in white phosphorus, respectively, are :

1. 12 and 3

2. 20 and 3

3. 20 and 4

4. 12 and 4

Among the following, the number of halide(s)  which is/are inert to hydrolysis is _______.

1. BF₃

2. SiCl₄

3. PCl₅

4. SF₆

The correct statement about B₂H₆ is:

1. Terminal B–H bonds have less p-character when compared to bridging bonds.

2. The two B–H–B bonds are not of the same length.

3. All B–H–B angles are 120°.

4. Its fragment, BH_3, behaves as a Lewis base.