Reaction of Carbonates and Bicarbonates with Dil. Sulphuric Acid

Q.

The reaction of sodium carbonate with sulphuric acid results only in the formation of salt and water.

1. True

2. False

Q.

What happens when sodium carbonate reacts with sulphuric acid?

1. Sodium oxide is formed

2. Sodium sulphate is formed

3. Sodium bisulphite is formed

4. Sodium hydroxide is formed

Q.

We cannot prepare lead sulphate by treating lead carbonate with dilute sulphuric acid.Why?

Q. Complete the reaction:
Potassium hydroxide + → Potassium nitrate + Water

1. Nitric acid
2. Sodium nitrate
3. Ammonia

Q.

Which gas is released when acids react with metal carbonates?

1. CO₂

2. H₂

3. O₂

4. CO

Q.

When a dilute acid X reacts with sodium carbonate, then sodium chloride, gas Y and water are formed. A gas Y is formed in the form of brisk effervescence.What is gas Y?

1. O₂

2. CO₂

3. CO

4. H₂

Q.

Acids react with carbonates to give ___ as one of the products.

Q.

Why is a direct reaction between ${\mathrm{SO}}_3$ and water avoided in the contact process?

Q. Which of the following represents saponification reaction?

1. $C{H}_{3}COONa+NaOH\stackrel{CaO}{\to }C{H}_4+N{a}_{2}C{O}_3$
2. $C{H}_{3}COOH+C_2{H}_{5}OH\stackrel{H_{2}S{O}_4}{\to }C{H}_{3}COO{C}_2{H}_5+H_{2}O$
3. $2C{H}_{3}COOH+2Na\to 2C{H}_{3}COONa+H_2$
4. $C{H}_{3}COO{C}_2{H}_5+NaOH\to C{H}_{3}COONa+C_2{H}_{5}OH$

Q.

You are given three white powders: calcium carbonate, lead carbonate and zinc carbonate. Describe the tests you would carry out in solution to identify the metal ion in each of the above compounds using ${\mathrm{NH}}_4\mathrm{OH}$ solution.

Q.

Illustrate an activity showing a chemical reaction and state your observation. Give suitable examples in support of your answer.

Q. Identify the compounds which on reacting with sulphuric acid produce a gas that turns limewater milky.

1. Copper carbonate
2. Potassium bicarbonate
3. Sodium hydrogen carbonate
4. Sodium hydroxide

Q. Which of the following is(are) not correctly matched?

1. $\left(2\right)$ and $\left(3\right)$
2. $\left(1\right)$ and $\left(4\right)$
3. $\left(1\right)$ and $\left(3\right)$
4. $\left(1\right)$ and $\left(2\right)$

Q. Why naoh does not react with solid sodium carbonate??

Q.

The product formed in the following reaction will be:

$2KHC{O}_3+H_{2}S{O}_4\to$

1. $K_{2}S{O}_4+C{O}_2$

2. $K_{2}S{O}_4+2H_{2}O+2C{O}_2$

3. $K_{2}S{O}_4+H_{2}O$

4. $K_{2}S{O}_4+H_{2}S+C{O}_2$

Q. When $C{O}_2$ is continuously passed for a long time into an aqueous solution of sodium carbonate, the formula of the crystalline substance formed is:

1. $N{a}_{2}C{O}_3$
2. $NaHC{O}_3$
3. both $N{a}_{2}C{O}_3$ and $NaHC{O}_3$
4. none of the above

Q. Write the reason for the following statements.

Q.

When ${\mathrm{CO}}_2$ is passed through lime water, milkiness formed is due to:

1. ${\mathrm{CaCO}}_3$

2. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$

3. $\mathrm{Ca}{\left({\mathrm{HCO}}_3\right)}_2$

4. $\mathrm{None}\mathrm{of}\mathrm{these}$