| 1 |
Sodium is collected over molten sodium chloride in Down's cell, because. |
- A. It does not react with NaCl
- B. It is lighter in weight and floats on molten NaCl
- C. Its reactivity is greater than NaCl
- D. None of these
|
| 2 |
Setting of Plaster of Paris is accompanied with |
- A. Hydrogen bonding
- B. Hydration
- C. Dehydration
- D. None of these
|
| 3 |
Which one of the following elements has the same oxidation number in all its known compounds. |
- A. Beryllium
- B. Nitrogen
- C. Sulphur
- D. Chorine
|
| 4 |
The Milk of magnesia is used for the treatment of |
- A. Basicity
- B. Rancidity
- C. Acidity
- D. Jaundance
|
| 5 |
Which oxide is amphoteric in nature. |
- A. BeO
- B. MgO
- C. CaO
- D. BaO
|
| 6 |
The ore CaSO4.2H2O has the general name. |
- A. Gypsum
- B. dolomite
- C. Calcite
- D. Epsom salt
|
| 7 |
Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell |
- A. H<sub>2</sub>
- B. Ba
- C. Ra
- D. Rn
|
| 8 |
Chile saltpeter has the chemical formula |
- A. NaNO3
- B. KNO3
- C. Na2B4O7
- D. Na2CO3.H2O
|
| 9 |
Which one of the following pairs of metal reactive directly with nitrogen |
- A. Na and Mg
- B. Li and Mg
- C. Mg and Ca
- D. Li and Be
|
| 10 |
In Down's cell anode is made up of. |
- A. Iron
- B. Copper
- C. Graphite
- D. Platinum
|