DIRECTIONS : Questions based on Chemistry.
11. |
Which one of the following glasses is used in bullet proof screens? |
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A. Soda glass |
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B. Pyrex glasss |
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C. Jena glass |
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D. Reinforced glass |
12. |
For Which one of the following is the density maximum ? |
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A. Chloroform |
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B. Water |
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C. Benzene |
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D. Ice |
13. |
Which substance is used to retard the setting action of cement? |
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A. CaO |
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B. AlO |
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C. CaSO.2HO |
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D. NaO + KO |
14. |
What is a mixture of potassium nitrate , powdered charcoal and sulphur called? |
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A. Glass |
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B. Cement |
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C. Paint |
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D. Gun Powder |
15. |
Which one of the following is the softest? |
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A. Iron |
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B. Aluminium |
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C. Calcium |
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D. Lithium |