P-block elements practice · Mixed difficulty

The catalyst used in the manufacture of ${H_2}S{O_4}$ by contact process is

Bromargyrite is a mineral of:

$PC{l_3}$ on hydrolysis gives

Which has the same electronic configuration as of inert gas?

Which of the following does not exist?

When ammonium nitrate is heated at ${250^ \circ }C$ the gas evolved is

Which noble gas is not found in atmosphere?

The number of sigma bonds in ${P_4}{O_{10}}$ is:

Which element is extracted commercially by the electrolysis of an aqueous solutions of one of its compounds?

Which ion will not be precipitated by aq. $\left({NH}_4\right)_2 {S}$ ?

Which statement is not correct?

$\begin{aligned} & \mathrm{Cu}+\underset{\text { (dil) }}{\mathrm{HNO}_3} \rightarrow \mathrm{a}+\mathrm{Cu}\left(\mathrm{NO}_3\right)_2+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{Zn}+\underset{\text { (dil) }}{\mathrm{HNO}_3} \rightarrow \mathrm{b}+\mathrm{Zn}\left(\mathrm{NO}_3\right)_2+\mathrm{H}_2 \mathrm{O} \end{aligned}$

Here a and b are:

Liquid ammonia is used in refrigeration because of its

Assertion (A) : $\mathrm{XeF}_6$ can be used as an oxidising agent.

Reason (R) : Oxidation state of $\mathrm{Xe}_{\mathrm{e}}$ in $\mathrm{XeF}_6$ is ${+ 6}$.

An element $M$ belongs to group- 15 and it occurs as the founder of the apatite family. It is an essential constituent of animal and plant matter. It is also present in bones as well as in living cells. Identify $M$.

When chlorine water is exposed to sunlight, ${\mathrm{O}_2}$ is liberated. Hence:

When concentrated ${H_2}S{O_4}$ is added to dry $KN{O_3}$, brown fumes evolve.These fumes are of:

Which forms new compound in air?

Assertion (A): To initiate the reaction between $\mathrm{O}_2$ and a metal, some external heating is required.

Reason (R): Bond dissociation enthalpy of $\mathrm{O}=\mathrm{O}$ bond is high $\left(493.4 \mathrm{~kJ} \mathrm{~mol}^{-1}\right)$.

Hyponitrous acid is:

The word argon means:

Which of the following will show disproportionation reaction?

$S{O_2}$ reacts with $C{l_2}$ to yield:

Halogens are:

A chloride salt solution acidified with dil. $\mathrm{HNO}_{3}$ gives a curdy white precipitate, [A], on addition of $\mathrm{AgNO}_{3}$. [A] on treatment with $\mathrm{NH}_{4} \mathrm{OH}$ gives a clear solution, B. A and B are respectively

In the laboratory ${H_2}S$ gas is prepared by using black lumps and dil. ${H_2}S{O_4}$ The black lumps are

The product obtained as a result of a reaction of nitrogen with $Ca{C_2}\,$ is:

Which one of the following noble gases is not found in the atmosphere

$\mathrm{N}{\mathrm{H}_3}$ can be collected by the displacement of:

Statement-I: There are two types of ${Cl}-{P}-{Cl}$ bond angles of $90^{\circ}$ and $120^{\circ}$ and two types of ${P}-{Cl}$ single bonds, two weaker than the rest three bonds is ${PCl}_5$ molecule.

Statement-II: ${P}$ in ${PCl}_s$ is ${sp}^3 {d}-$hybridized giving trigonal bipyramid geometry where two ${P}-{Cl}$ axial bonds are longer and weaker than the three equatorial bonds.