| 1 |
Which is the least reactive of all the alkali metals |
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| 2 |
Sulphur is essential constituent for plants. Which is not role of sulphur |
- A. Chlorophyll development
- B. Development of root system
- C. Constituents of some proteins
- D. Increase transpiration force
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| 3 |
The mineral CaSO<sub>4</sub>.2H<sub>2</sub>O has the general name |
- A. Dolomite
- B. Gypsum
- C. Calcite
- D. Epsom Salt
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| 4 |
Which one of the following has lowest first ionization energy. |
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| 5 |
Down's cell is used to prepare. |
- A. Sodium carbonate
- B. Sodium bicarbonate
- C. sodium metal
- D. Sodium hydroxide
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| 6 |
Chile saltpeter has the chemical formula |
- A. NaNO3
- B. KNO3
- C. Na2B4O7
- D. Na2CO3.H2O
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| 7 |
Which one is not use of lime |
- A. Extraction of metals
- B. Ceramic industry
- C. Preparation of bleaching powder
- D. Preparation of gypsum
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| 8 |
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
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| 9 |
Which element reacts with alkali and H2 gas is produced. |
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| 10 |
Which hydroxide decomposes on heating. |
- A. LiOH
- B. NaOH
- C. KOH
- D. CaOH
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