P-block elements practice · Mixed difficulty

The type of bonds present in $\mathrm{N}_2 \mathrm{O}_5(\mathrm{~g})$ are;

Which of the following property does not correspond to the order ${HI} < {HBr} < {HCl} < {HF}$ ?

Assertion (A) : Among nitrogen halides $\mathrm{NX}_3$, the dipole moment is highest for $\mathrm{NI}_3$ and lowest for $\mathrm{NF}_3$.

Reason (R): Nitrogen halides $N X_3$, have trigonal pyramidal structure.

The noble gas which behaves abnormally in liquid state is:

Atomicity of phosphorus is:

Bacteria convert molecular nitrogen into:

Assertion (A): While moving from $\mathrm{N}$ to $\mathrm{P}$ covalent radius increases significantly but from $\mathrm{As}$ to $\mathrm{Bi}$ only a small increase is observed.
Reason (R): For a particular oxidation state covalent radii and ionic generally radii increases down the group.

Assertion: $\mathrm{SiCl}_4$ is more hydrolysed then $\mathrm{SiF}_4$.

Reason: -1 effect of $\mathrm{F} > \mathrm{Cl}$.

Which one of the following reacts with conc. ${H}_2 {SO}_4$ ?

For blasting purpose TNT is mixed with:

Blasting of TNT is done by mixing it with:

Sulphur in + 3 oxidation state is present in

Assertion (A): $\mathrm{H}_3 \mathrm{PO}_4$ is less acidic than $\mathrm{H}_3 \mathrm{PO}_3.$

Reason (R): Oxidation state of phosphorus in $\mathrm{H}_3 \mathrm{PO}_4< \mathrm{H}_3 \mathrm{PO}_3.$

$C{l_2}$ on reaction with cold and dilute NaOH gives

When ammonium chloride is heated with NaOH, a gas is evolved, which has

A compound which leaves behind no residue on heating is:

Choose the correct statements from the following

A. All group 16 elements form oxides of general formula $\mathrm{EO}_2$ an $\mathrm{EO}_3$, where $\mathrm{E}=\mathrm{S}, \mathrm{Se}, \mathrm{Te}$ and Po. Both the types of oxides are acidic in nature.

B. $\mathrm{TeO}_2$ is an oxidising agent while $\mathrm{SO}_2$ is reducing in nature.

C. The reducing property decreases from $\mathrm{H}_2 \mathrm{~S}$ to $\mathrm{H}_2 \mathrm{Te}$ down the group.

D. The ozone molecule contains five lone pairs of electrons.

Choose the correct answer from the options given below:

Molecules of a noble gas do not posses virbrational energy because a noble gas

Halogen used in the preparation of insecticides is:

I. Melting point of rhombic sulphur is higher than that of monoclinic sulphur.

II. Specific gravity of rhombic sulphur is lower than that of rhombic sulphur.

III. Sulphurous acid $\left(\mathrm{H}_2 \mathrm{SO}_3\right)$ has two one pairs on S-atom. The incorrect statement(s) is/are

${Cl}_2$ reacts with hot and conc. ${NaOH}$ to give-

Electronic configuration of group- 17 elements is

In one of the following reactions $HN{O_3}$ does not behave as an oxidizing agent Identify it

Ozone is readily dissolved in:

Paramagnetic molecule is:

Platinum, palladium and iridium are called noble metals because

The halogen which has greater bond dissociation energy after ${Cl}_2$ is

Select the correct statement.

Assertion (A): It is necessary to use a silent electrical discharge in preparation of ozone to prevent its decomposition.

Reason (R): Formation of ozone from oxygen is an exothermic process.

When potassium ferrocyanide crystals are heated with conc. $\mathrm{H}_2 \mathrm{SO}_4$, the gas evolved is