| 141. | The chemical formula of Baking Soda is – |
A. Na₂CO₃ | |
B. Na₂CO₃ -H₂O | |
C. Na₂CO₃ -10H₂O | |
D. NaHCO₃ |
| 142. | The chemical formula of Hypo is – |
A. Na₂S₂O₃ -5H₂O | |
B. Na₂S₂O-3H₂O | |
C. Na₂S₂O -2H₂O | |
D. Na₂SO₄ -10H₂O |
| 143. | The molecular formula of common salt is – |
A. NaCI | |
B. NaNO₃ | |
C. MgcI₂ | |
D. CaCI₂ |
| 144. | Which of the following is the chemical name of Satharan? |
A. calcium carbonate | |
B. sodium carbonate | |
C. Sodium chloride | |
D. None of these |
| 145. | What is the chemical name of ‘hypo’ commonly used in photography? |
A. Sodium thiosulfate | |
B. silver nitrate | |
C. sodium nitrate | |
D. silver iodide |
| 146. | The chemical name of baking soda is |
A. sodium carbonate | |
B. sodium bicarbonate | |
C. sodium acetate | |
D. sodium hydroxide |
| 147. | What is the popular name of washing soda? |
A. calcium carbonate | |
B. sodium bicarbonate | |
C. sodium carbonate | |
D. sodium hydroxide |
| 148. | Sodium thiosulphate is used in photography |
A. darken the picture | |
B. to whiten the picture | |
C. In the separation of silver bromide by dissolving | |
D. to make the picture blur free |
| 149. | The most abundant salt found in sea water is |
A. Sodium chloride | |
B. zinc oxide | |
C. sodium carbonate | |
D. magnesium chloride |
| 150. | The common name of the chemical compound having the formula NaOH is |
A. Leave the caustic soda | |
B. Caustic potash | |
C. soda ash | |
D. sodium hydroxide |