| 1 |
Setting of Plaster of Paris is accompanied with |
- A. Hydrogen bonding
- B. Hydration
- C. Dehydration
- D. None of these
|
| 2 |
Chile saltpeter has the chemical formal |
- A. NaNO<sub>3</sub>
- B. KNO<sub>2</sub>
- C. Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>
- D. Na<sub>2</sub>CO<sub>3</sub>.H<sub>2</sub>O
|
| 3 |
Which substance is used to lower the melting point of NaCl in Down's cell |
- A. CaCO3
- B. CaCl2
- C. MgSO4
- D. AlCl3
|
| 4 |
The word alkali is derived from which language |
- A. Arabic
- B. Greek
- C. French
- D. German
|
| 5 |
------------- does not belong to Alkaline-Earth metals |
|
| 6 |
Which one of the following elements has the same oxidation number in all its known compounds. |
- A. Beryllium
- B. Nitrogen
- C. Sulphur
- D. Chorine
|
| 7 |
Which of the following sulphates is not soluble in water. |
- A. Sodium sulphate
- B. Potassium sulphate
- C. Zinc sulphate
- D. Barium Sulphate
|
| 8 |
Which one of the following is not an alkali metal. |
- A. Francium
- B. Cesium
- C. Rubidium
- D. Radium
|
| 9 |
Which oxide is amphoteric in nature. |
- A. BeO
- B. MgO
- C. CaO
- D. BaO
|
| 10 |
The crystals of caustic soda, NaOH, are hygroscopic when these crystals are exposed to air. |
- A. Gain water and remains solid
- B. Gain water and becomes liquid
- C. Lose mass and remain solid
- D. Remain unchanged on heating.
|