Ionic Salts and Their Characteristic

Q.

Which of the following anions are orange in colour?

1. Permanganate ion

2. Dichromate ion

3. Sulphate ion

4. Chloride ion

Q.

Identify the salt which cannot react with NH₄OH solution.

1. ZnCl₂

2. CuCl₂

3. NH₄Cl

4. FeCl₂

Q.

An ionic salt exhibits colour only when _______.

1. its anions are coloured.

2. its cations are coloured.

3. either cation or anion is coloured.

4. both cation and anion are colourless.

Q.

Sodium hydroxide and ammonium hydroxide are used in analytical chemistry for identifying __ [acidic/basic] radicals.

Q.

Choose the correct balanced chemical equation involving reaction of copper sulphate with ammonium hydroxide?

1. $CuS{O}_4+2N{H}_{4}OH\to (N{H}_4{)}_{2}S{O}_4+Cu(OH{)}_2$

2. $CuS{O}_4+N{H}_{4}OH\to (N{H}_4{)}_{2}S{O}_4+Cu(OH{)}_2$

3. $CuS{O}_4+N{H}_{4}OH\to N{H}_{3}S{O}_4+Cu\left(OH\right)+H_{2}O$

4. $CuS{O}_4+N{H}_{4}OH\to (N{H}_4{)}_{2}S{O}_4+Cu(OH)+H_{2}O$

Q.

Salts of which of the following ion give rise to form coloured solution?

1. Cu²⁺

2. Ca²⁺

3. Zn²⁺

4. Na⁺

Q.

Identify the group of elements that are generally colourless.

1. 1

2. 14

3. 16

4. 3

Q.

Match the following

$\begin{array}{cccc}& \text{Cation}& & \text{Colour}\\ \text{A)}& C{u}^{2+}& \text{a)}& \text{Pink}\\ \text{B)}& C{r}^{3+}& \text{b)}& \text{Brown}\\ \text{C)}& M{n}^{2+}& \text{c)}& \text{Green}\\ \text{D)}& F{e}^{2+}& \text{d)}& \text{Light Green}\\ \text{E)}& F{e}^{3+}& \text{e)}& \text{Blue green}\end{array}$

1. $A\to e,B\to c,C\to a,D\to d,E\to b$

2. $A\to b,B\to a,C\to c,D\to d,E\to e$

3. $A\to b,B\to d,C\to a,D\to c,E\to e$

4. $A\to b,B\to c,C\to d,D\to a,E\to e$

Q.

Pick up the coloured anion from the options given below.

1. $S{O}_3^{-}$

2. $MN{O}_4^{-}$

3. $C{l}^{-}$

4. $C{O}_3^{-}$ ​​​​​​​

Q.

Which of the following anion is gives a colourless solution?

1. Nitrate ion

2. Permanganate ion

3. Dichromate ion

4. Chromate ion