7
MCQ (Single Correct Answer)
Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in group 14 elements follows the order
A
$\mathrm{C}>\mathrm{Si}>\mathrm{Ge}>\mathrm{Sn}$
B
$\mathrm{C}>>\mathrm{Si}>\mathrm{Ge} \approx \mathrm{Sn}$
C
$\mathrm{Si}>\mathrm{C}>\mathrm{Sn}>\mathrm{Ge}$
D
$\mathrm{Ge}>\mathrm{Sn}>\mathrm{Si}>\mathrm{C}$
8
MCQ (Single Correct Answer)
Silicon has a strong tendency to form polymers like silicones. The chain length of silicone polymer can be controlled by adding
A
$\mathrm{MeSiCl}_3$
B
$\mathrm{Me}_2 \mathrm{SiCl}_2$
C
$\mathrm{Me}_3 \mathrm{SiCl}$
D
$\mathrm{Me}_4 \mathrm{Si}$
9
MCQ (Single Correct Answer)
Ionisation enthalpy $\left(\Delta_i \mathrm{H} \mathrm{kJ} \mathrm{mol}^{-1}\right)$ for the elements of group 13 follows the order
A
$\mathrm{B}>\mathrm{Al}>$ Ga $>$ In $>$ TI
B
B $<$ Al $<$ Ga $<$ In $<\mathrm{Tl}$
C
$\mathrm{B}<\mathrm{Al}>\mathrm{Ga}<\mathrm{In}>\mathrm{TI}$
D
$\mathrm{B}>\mathrm{Al}<\mathrm{Ga}>\mathrm{In}<\mathrm{TI}$
10
MCQ (Single Correct Answer)
In the structure of diborane,
A
All hydrogen atoms lie in one plane and boron atoms lie in a plane perpendicular to this plane
B
2 boron atoms and 4 terminal hydrogen atoms lie in the same plane and 2 bridging hydrogen atoms lie in the perpendicular plane
C
4 bridging hydrogen atoms and boron atoms lie in one plane and two terminal hydrogen atoms lie in a plane perpendicular to this plane
D
All the atoms in the same plane
11
MCQ (Single Correct Answer)
A compound X , of boron reacts with $\mathrm{NH}_3$ on heating to give another compound $Y$ which is called inorganic benzene. The compound $X$ can be prepared by treating $\mathrm{BF}_3$ with lithium aluminium hydride. The compounds $X$ and $Y$ are represented by the formulas.
A
$\mathrm{B}_2 \mathrm{H}_6, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6$
B
$\mathrm{B}_2 \mathrm{O}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6$
C
$\mathrm{BF}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6$
D
$\mathrm{B}_3 \mathrm{~N}_3 \mathrm{H}_6, \mathrm{~B}_2 \mathrm{H}_6$