P-block elements practice · Medium

Consider the following reaction :

Soda extract+ dilute $\mathrm{HNO}_3+\mathrm{Cl}_2 \xrightarrow{\mathrm{CC}_4}$ Brown layer. The element confirmed in this test can be:

Among the following which is most likely unhybridized molecule?

${\text{(X}})\xleftarrow[{{\text{Boil}}}]{{{{\text{H}}_2}{\text{O}}}}{{\text{H}}_4}{{\text{P}}_2}{{\text{O}}_7}\xrightarrow{{{\text{ Strong heating }}}}{\text{(Y)}}$
In the sequence of reactions given above, compounds $(\mathrm{X})$ and $(\mathrm{Y})$ are respectively

Which among the following is the most reactive?

Which one of the following reacts with glass?

Which of the following is INCORRECT?

The function of $Fe{\left( {OH} \right)_3}$ in the contact process is

Assertion: $\mathrm{H}_2 \mathrm{O}$ is a liquid while $\mathrm{H}_2 \mathrm{~S}$ is a gas

Reason: There is stronger intermolecular hydrogen bonding in $\mathrm{H}_2 \mathrm{~S}$.

Assertion (A) : Structure of $\mathrm{SO}_4^{2-}$ is identical for $\mathrm{S}_2 \mathrm{O}_3^{2-}$.

Reason (R) : Sulphur atoms in $\mathrm{S}_2 \mathrm{O}_3^{2-}$ are in different oxidation states.

Antimony dissolves in aquaregia to give:

Assertion (A): ${NO}_3^{-}$ is planar while ${NH}_3$ is pyramidal.

Reason (R): ${N}$ in ${NO}_3^{-}$ is ${sp}^2$ hybridized but in ${NH}_3$ it is ${sp}^3$-hybridized.

Assertion (A): As to $\mathrm{Bi}$, there is only a small increase in covalent radius.

Reason (R): $d$ and/or $f$-orbitals are completely filled in heavier elements.

On passing ammonia gas through a reagent ' $x$ ', brown precipitate is observed that confirms the presence of $\mathrm{NH}_4^{+}$ion. The reagent ' $\mathrm{x}$ ' is:

Statement I: The coordination number of ' $N$ ' is seldom, if ever 5 where as that of $P$, which is in the same group, is 5 in a large number of compounds

Statement II: The first IE of nitrogen is more than that of $\mathrm{P}$

In the reaction, $X + I_2 + 2HCl \to {SnCl}_4 + 2HI$

The correct option regarding $X$ is/are

Thermally most stable compound is

Which one is not an acid salt?

Choose the correct statements about the hydrides of group 15 elements.

A. The stability of the hydrides decreases in the order $\mathrm{NH}_3 > \mathrm{PH}_3 > \mathrm{AsH}_3 > \mathrm{SbH}_3 > \mathrm{BiH}_3$

B. The reducing ability of the hydride increases in the order $\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 < \mathrm{BiH}_3$

C. Among the hydrides, $\mathrm{NH}_3$ is strong reducing agent while $\mathrm{BiH}_3$ is mild reducing agent.

D. The basicity of the hydrides increases in the order

$\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 < \mathrm{BiH}_3$

Choose the most appropriate from the option given below

A hybrid rocket propellant uses

$HI$ reacts with $HN{O_3}$ to form: