Carbonates and Bicarbonates

Q.

What happens when concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$is added to Calcium Fluoride?

Q. The common name of calcium hydroxide is:

1. slaked lime
2. water gas
3. lime water
4. quick lime

Q. Question 1.2

A solution of a substance ‘X’ is used for white washing.

Write the reaction of the substance ‘X’ named above with water.

Q.

Which gives ${\mathrm{CO}}_2$ on heating slaked lime or limestone?

Q.

What are the different ways by which Carbon dioxide is formed?

Q.

Bleaching powder is obtained when:

1. Slaked lime reacts with NaOH

2. Slaked lime reacts with Cl₂

3. Slaked lime reacts with H₂

4. Slaked lime reacts with NaHCO₃

Q.

Why does limewater turn milky?

Q. $CaOC{l}_2$ is the product of reaction between calcium hydroxide and ___ and is commonly called as ___.

1. Chlorine and bleaching powder
2. Nitrogen and lime powder
3. Fluorine and talcum powder
4. Hydrogen and Gunpowder

Q.

$X+HCl\to ZnC{l}_2+H_{2}O+C{O}_2$

Find X and balance the equation.

1. ZnCO + 2 HCl → ZnCl₂ + H₂O + CO₂

2. 2 ZnCl + HCl → ZnCl₂ + H₂O + CO₂

3. 2ZnCO₃ + HCl → 2ZnCl₂ + H₂O + CO₂

4. ZnCO₃ + 2HCl →ZnCl₂ + H₂O + CO₂

Q. A student took a sample of a chemical and added acid to it, a gas is released which turned lime water milky. Which of the following option could be the chemical sample taken by the student?

1. $\text{NaOH}$
2. $\text{NaCl}$
3. ${\text{C}}_2{\text{H}}_6$
4. ${\text{CaCO}}_3$

Q.

A student took a sample of a chemical and added acid to it, a gas is released which turned lime water milky. Which of the following option/options could be the chemical sample taken by the student?

1. $NaHC{O}_3$

2. $NaCl$

3. $C_2{H}_6$

4. $CaC{O}_3$

Q.

The chemical formula of baking soda is

1. $N{a}_{2}C{O}_3$

2. $CaC{O}_3$

3. $NaHC{O}_3$

4. $NaC{O}_3$

Q. Match the element in Column I with their corresponding mineral formation in Column II.

Q. The chemical formula of washing soda is:

1. $N{a}_{2}C{O}_3.7H_{2}O$
2. $N{a}_{2}C{O}_3.10H_{2}O$
3. $N{a}_{2}C{O}_3.H_{2}O$
4. $N{a}_{2}C{O}_3$

Q. Identify 'True' or 'False' for the following statements :
Sand is an oxide of silicon.

1. True
2. False