1 |
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.
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2 |
Which is the least reactive of all the alkali metals |
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3 |
The ore CaSO4.2H2O has the general name. |
- A. Gypsum
- B. dolomite
- C. Calcite
- D. Epsom salt
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4 |
Which element is present in chlorophyll |
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5 |
Setting of Plaster of Paris is accompanied with |
- A. Hydrogen bonding
- B. Hydration
- C. Dehydration
- D. None of these
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6 |
Down's cell is used to prepare. |
- A. Sodium carbonate
- B. Sodium bicarbonate
- C. sodium metal
- D. Sodium hydroxide
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7 |
Which on eof the following alkaline earth metal form peroxide when heated with oxygen at 600 <sup>o</sup>C |
- A. Magnesium
- B. Calcium
- C. Strontium
- D. Barium
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8 |
The oxides of beryllium are |
- A. Basicity
- B. Rancidity
- C. Amphoteric
- D. none of all
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9 |
The Milk of magnesia is used for the treatment of |
- A. Basicity
- B. Rancidity
- C. Acidity
- D. Jaundance
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10 |
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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