Embibe Experts Solutions for Chapter: The p-block Elements, Exercise 1: KEAM 2018

Choose the correct statements about diborane;
I. It is prepared by the oxidation of sodium borohydride with iodine.
II. It undergoes cleavage reactions with Lewis bases to give borane adducts.
III. It is produced on an industrial scale by the reaction of ${\mathrm{BF}}_3$ with ${\mathrm{LiAlH}}_4$.
IV. It is readily hydrolysed by water to give borazine.
V. It burns in oxygen and gives boron trioxide.

More than four bonds are made by how many elements in the carbon family?

Which hydride amongst the following has the least boiling point ?

The oxyacid of phosphorus that contains one $\mathrm{P}-\mathrm{OH},$ two $\mathrm{P}-\mathrm{H}$ and one $\mathrm{P}=\mathrm{O}$ bonds is

The compound(s) that does(do) not exist is (are)

${\mathrm{PCl}}_3$ is stored in a well stoppered bottle since

Consider the following compounds:

$1. {\left(N{H}_4\right)}_{2}C{r}_2{O}_7$

$2. N{H}_{4}N{O}_2$

$3. N{H}_{4}V{O}_3$

$4. N{H}_{4}N{O}_3$

Which compound(s) yield(s) nitrogen gas upon heating?

Among the following, which species represents a pseudohalide ?