P Block Elements - Inorganic Chemistry PYQ

Match the following compounds with their corresponding physical properties.

Identify (P) and (Q) in the following reaction.

The correct order of acidic character of the following is

In the following reactions (i) and (ii), the number of moles of chlorine gas released respectively are

(i) \(\mathrm{MnO}_2+4 \mathrm{HCl} \longrightarrow\)

(ii) \(\mathrm{KMnO}_4+16 \mathrm{HCl} \longrightarrow\)

Xenon best reacts with

\(\mathrm{H}_3 \mathrm{BO}_3\) or \(\mathrm{B}(\mathrm{OH})_3\) is considered as an acid because its molecule

What would be the product of following reaction?

$$\mathrm{SiCl}_4 \stackrel{\text { Excess of } \mathrm{H}_2 \mathrm{O}}{\longrightarrow} \text { ? (Major product) }$$

Which of the following is formed when \(\mathrm{SO}_3\) is absorbed by concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) ?

Identify the correct statements about the anomalous behaviour of boron.

I. Boron trihalides can form dimeric structures.

II. Boron shows +1 as stable oxidation state.

III. Maximum covalency of boron is four.

IV. Boron does not form \(\mathrm{BF}_6^{6-}\) ion.

Among \(\mathrm{P}_4, \mathrm{~S}_8\) and \(\mathrm{N}_2\) the elements which undergo disproportionation when heated with NaOH solution.

Identify the correct statements about boron.

I. It has high melting point.

II. It has high density.

III. It has high electrical conductivity.

IV. B-10 isotope of it has high ability to absorb neutrons.

Assertion (A) HCl gas is dried by passing through concentrated H\(_2\)SO\(_4\).

Reason (R) HCl gas reacts with NH\(_3\) that gives white fumes.

Identify the \(P\) and \(Q\) of the following reaction

$$P+Q \longrightarrow\left[B(O H)_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}$$

Observe the following stoichiometric equation

$$\mathrm{P}_4+3 \mathrm{OH}^{-}+3 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{PH}_3+3 x^{-}$$

What is the conjugate acid of $x^{-}$?

Identify the correct statements

i. Oxidation of $\mathrm{NaBH}_4$ with $\mathrm{I}_2$ gives $\mathrm{B}_2 \mathrm{H}_6$

ii. $\mathrm{B}_2 \mathrm{H}_6$ burns in oxygen and releases an enormous amount of energy

iii. $\mathrm{B}_2 \mathrm{H}_6$ on hydrolysis gives a tribasic acid

Which of the following are correct?

i. Basic structural unit of silicates is $-R_2 \mathrm{SiO}-$

ii. Silicones are biocompatible

iii. Producer gas contains CO and $\mathrm{N}_2$

The correct option is

Which of the following reactions give phosphine?

i. Reaction of calcium phosphide with water

ii. Heating white phosphorous with concentrated NaOH solution in inert atmosphere

iii. Heating red phosphorous with alkali