Sodium Bicarbonate

Q.

Why are some liquid medicines kept in dark colored bottles?

Q.

Name two constituents of baking powder?

Q. X is a mixture of sodium bicarbonate and Y. X is extensively used in baking breads and on heating it gives out Z gas. This gas rises the dough and makes the bread spongy and puffy. Identify X, Y and Z from the options given below.

1. X- Washing soda, Y- Potassium nitrate, Z- Nitrogen
2. X- Baking soda, Y- Potassium hydrate, Z- Oxygen
3. X- Baking powder, Y- Potassium hydrogen tartarate, Z- Carbon dioxide
4. X- Baking powder, Y- Potassium hydrogen phosphate, Z- Carbon monoxide

Q. Baking soda is in nature.

1. alkaline
2. acidic
3. neutral

Q.

13. Name two carbonates that do not decompose on heating.

Q.

What is baking powder a mixture of?

Q.

State the chemical property in each case on which the following uses of baking soda are based:
(i) as an antacid.
(ii) as a constituent of baking powder. [3 MARKS]

Q. An amateur chef added baking powder to his bread batter. He observed that after baking the bread it was spongy and soft. Which of the following gas was responsible for this?

1. Oxygen
2. Hydrogen
3. Carbon dioxide
4. Nitrogen

Q. is the chemical formula of baking soda.

1. ${\text{Na}}_2{\text{CO}}_3$
2. ${\text{NaHCO}}_3$
3. ${\text{NaBH}}_4$
4. ${\text{Na}}_2\text{O}$