13 th group elements (p-block) practice · Mixed difficulty

Which of the following is ionic.

Which among the following statements are correct?
(i)Carbon monoxide is neutral whereas $S{O_3}$ is acidic.
(ii)Potassium oxide is basic whereas nitrous oxide is acidic.
(iii) Aluminium and zinc oxides are amphoteric.
(iv) Sulphur trioxide is acidic whereas phosphorus pentoxide is basic.
(v) Carbon dioxide is neutal whereas sulphur dioxide is amphoteric

Statement-I:Most of the $Al{Cl}_3$ is dimerised through halogen bridging, ${Al}_2 {Cl}_6$

Statement-II: ${AlCl}_3$ complete its octet by accepting electrons from halogen in halogen bridged molecules, ${Al}_2 {Cl}_6$

Assertion (A): $\mathrm{HBF}_4$ is a very strong acid.

Reason $(\mathbf{R}): \mathrm{B}(\mathrm{OH})_3$ behaves as an acid in the following reaction :
$\mathrm{B}(\mathrm{OH})_3+4 \mathrm{HF} \longrightarrow \mathrm{H}_3 \mathrm{O}^{+}+\left[\mathrm{BF}_4 \right]^{-}+2 \mathrm{H}_2 \mathrm{O}.$

Consider the following statements

(i) Aluminium carbide on reaction with water gives methane gas.

(ii) Permanent hardness of water is easily removed by boiling

(iii) ${H}_2 {O}_2$ dipole moment is more than that of ${H}_2 {O}$

(iv) Potassium impart blue colour to the flame test.

Incorrect statements among the following are

In alumino thermic process, Al is used as

The increasing order of atomic radii of group – 13 elements is

Which of the following elements can show covalency greater than 4
i) Be ii) P iii) S iv) B

An aqueous solution of borax is

Oxidation state of boron in magnesium boride $\left( {M{g_3}{B_2}} \right)$

Boric acid on heating at $150^\circ C$ gives:

In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?

Assertion (A): Aqueous solution of borax is acidic in nature.

Reason (R): Borax on reaction with aqueous hydrochloric acid gives boric acid as one of the products.

In light of the above statements, choose the correct answer.