Which of the following statements is correct for ${\mathrm{CsBr}}_3$?

(1) It is a covalent compound

(2) It contains ${\mathrm{Cs}}^{2+}$ and ${\mathrm{Br}}^{-}$ ions

(3) It contains ${\mathrm{Cs}}^{+},<mspace\; width="1em"></mspace>{\mathrm{Br}}^{-}$, and ${\mathrm{Br}}_2$ lattice molecules

(4) It contains ${\mathrm{Cs}}^{+}$ and ${\mathrm{Br}}_3^{-}$ ions

Which of the alkali metal chloride is expected to have the highest melting point?

(1) LiCI

(2) NaCI

(3) KCI

(4) RbCI

Sodium thiosulphate is formed when:

(1) NaOH is neutralized by ${\mathrm{H}}_2{\mathrm{SO}}_4$

(2) ${\mathrm{Na}}_2\mathrm{S}$ is boiled with S

(3) ${\mathrm{Na}}_2{\mathrm{SO}}_3$ is boiled with ${\mathrm{Na}}_2\mathrm{S}$ and ${\mathrm{I}}_2$

(4) ${\mathrm{Na}}_2{\mathrm{SO}}_4$ is boiled with ${\mathrm{Na}}_2\mathrm{S}$

When KCI is heated with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ and solid ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ we get:

(1) chromyl chloride

(2) chromous chloride

(3) chromic chloride

(4) chromic oxide

Among the following, which has minimum solubility in water?

(1) KOH

(2) CsOH

(3) LiOH

(4) RhOH

Lithium is the strongest reducing agent among alkali metals due to which of the following factor

(1) ionization energy

(2) Electron affinity

(3) Hydration energy

(4) Lattice energy

Which one of the following is formed on dissolving ${\mathrm{I}}_2$ in the aqueous solution of KI?

1. ${\mathrm{KIO}}_4$

2. KIO

3. ${\mathrm{KI}}_3$

4. ${\mathrm{KIO}}_3$

The raw materials in the Solvay process are

1. $\mathrm{NaOH},\mathrm{CaO}\text{\hspace{0.17em}and\hspace{0.17em}}{\mathrm{NH}}_3$

2. ${\mathrm{Na}}_2{\mathrm{CO}}_3,{\mathrm{CaCO}}_3\text{\hspace{0.17em}and\hspace{0.17em}}{\mathrm{NH}}_3$

3. ${\mathrm{Na}}_2{\mathrm{SO}}_4,{\mathrm{CaCO}}_3\text{\hspace{0.17em}and\hspace{0.17em}}{\mathrm{NH}}_3$

4. $\mathrm{NaCl},{\mathrm{NH}}_3,{\mathrm{CaCO}}_3$

When sulfur is heated with NaOH(aq) the compounds formed are:

1. ${\mathrm{Na}}_2\mathrm{S}+{\mathrm{H}}_2\mathrm{O}$

2. ${\mathrm{Na}}_2{\mathrm{SO}}_3+{\mathrm{H}}_2\mathrm{O}$

3. ${\mathrm{Na}}_2\mathrm{S}+{\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{O}$

4. ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{O}$

The process associated with sodium carbonate manufacture is known as........... process.

(1) Chamber

(2) Haber

(3) Leblanc

(4) Castner