Reactivity Trends (Group 2)

Q.

What is Mohr titration?

Q.

Give a chemical test to distinguish between the following pairs of compounds:

Sodium chloride solution and sodium nitrate solution.

Q. The oxidation state of the most electronegative element in the reactant and product of the reaction, $Ba{O}_2$ with dil $H_{2}S{O}_4$ are

1. O and – 1
2. – 2 and O
3. – 2 and – 1
4. – 2 only

Q.

What factors influence the rate of chemical reaction? [3 MARKS]

Q.

The given solution of lead nitrate, in order to obtain a yellow precipitate, must be mixed with:

1. Potassium chloride

2. Potassium nitrite

3. Potassium iodide

4. Potassium sulfate

Q. Ammoniacal solution of $MgS{O}_4$ in presence of $N{H}_{4}CI$ is heated with $N{a}_{2}HP{O}_4$ a white crystalline precipitate is formed of

1. 
2. 
3. 
4. 

Q. Aqueous copper sulphate solution (blue in colour) gives:
(a) a green precipitate with aqueous potassium fluoride, and
(b) a bright green solution with aqueous potassium chloride.

1. $\left[Cu\right(H_{2}O{)}_3\left(CN\right)]S{O}_4\cdot H_{2}O$
2. $\left[Cu\right(H_{2}O{)}_{3}S{O}_4]\cdot H_{2}O$
3. $\left[Cu\right(H_{2}O{)}_4]S{O}_4\cdot H_{2}O$
4. none of these

Q.

In the chemical reaction:

$C{l}_2\left(g\right)+2KI\left(aq\right)\to 2KCl\left(aq\right)+I_2\left(s\right)$

The products can be tested by:

1. $AgN{O}_3\left(aq\right)$

2. Starch solution

3. Litmus paper

4. Both (a) and (b)