Chemical Properties of Group 15 Elements

The ratio of sigma and $\mathrm{\pi }$ bonds present in pyrophosphoric acid is

Given below are two statements:

Statement I: ${\mathrm{SbCl}}_5$ is more covalent than ${\mathrm{SbCl}}_3$

Statement II: The higher oxides of halogens also tend to be more stable than the lower ones.

In the light of the above statements, choose the most appropriate answer from the options given below.

The number of $\mathrm{P}-\mathrm{O}-\mathrm{P}$ bonds in ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_7, {\left({\mathrm{HPO}}_3\right)}_3$, and ${\mathrm{P}}_4{\mathrm{O}}_{10}$ are respectively

Match List I with List II

Choose the correct answer from the options given below :

The possibility of photochemical smog formation is more at

The group of chemicals used as pesticide is

Statement-1 : ${\mathrm{SbCl}}_5$ is more covalent than ${\mathrm{SbCl}}_3$.

Statement-2 : Higher oxidation state halides of group 15 are more stable.

Nitrogen does not form ${\mathrm{NF}}_5$ because

Account for the following :

${\mathrm{BiCl}}_3$ is less covalent than ${\mathrm{PCl}}_3$.
 

${\mathrm{NH}}_3$ is basic while ${\mathrm{PH}}_3$ is:

Why does ${\mathrm{NCl}}_5$ not exist?

${\mathrm{MX}}_5 (\mathrm{M} = \mathrm{P}, \mathrm{As}, \mathrm{Sb} \mathrm{and} \mathrm{Bi})$ are known but ${\mathrm{MH}}_5$ are not known, why?

Find the incorrect statement:

Nitrogen combines with metals to form compounds called as

Which of the following statements is wrong?

Bond dissociation enthalpy of $\mathrm{E}—\mathrm{H} (\mathrm{E} = \mathrm{element})$ bonds is given below. Which of the compounds will act as strongest reducing agent?

The oxidation state of central atom in the anion of compound ${\mathrm{NaH}}_2{\mathrm{PO}}_2$ will be ______.

Maximum covalency of nitrogen is