The S-block Elements

In the metallurgical extraction of copper, following reaction is used:

FeO + SiO₂ ® FeSiO₃

FeO and FeSiO₃

FeO and FeSiO₃ respectively are.

Which of the following sets are correct regarding polymer?

(A) Copolymer: Buna-S

(B) Condensation polymer: Nylon-6,6

(C) Fibres: Nylon-6,6

(D) Thermosetting polymer: Terylene

(E) Homopolymer: Buna-N

Choose the correct answer form given options below

The oxide which contains an odd electron at the nitrogen atom is

Reaction of BeCl₂ with LiAlH₄ gives:

(A) AlCl₃

(B) BeH₂

(C) LiH

(D) LiCl

(E) BeAlH₄

Choose the correct answer from options given below:

Given below are two statements : one is labeled as Assertion A and the other is labeled as Reason R.

Assertion A: LiF is sparingly soluble in wate.

Reason R: The ionic radius of Li⁺ ion is smallest among its group members, hence has least hydration enthalpy.

In the light of the above statements, choose the most appropriate answer from the options given below.

The metal that has very low melting point and its periodic position is closer to a metalloid is

On combustion of $\mathrm{L}\mathrm{i},\mathrm{N}\mathrm{a}$ and $\mathrm{K}$ in excess of air, the major oxides formed, respectively, are:

Statement I: An alloy of lithium and magnesium is used to make aircraft plates.

Statement II: The magnesium ions are important for cell-membrane integrity.

In the light the above statements, choose the correct answer from the options given below