Deep blue color is imparted to glass by the presence of
1 Iron oxide
2 Cupric oxide
3 Nickel oxide
4 Cobalt oxide
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Which of the following is used for removing air bubbles from glass during its manufacture? 1 Feldspar 2 Arsenious oxide 3 Potassium carbonate 4 Soda ash
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Two or more forms of a chemical element having different physical properties but rising to identical chemical compounds are called 1 Allotropes 2 Isotopes 3 Isomers 4 Isotones
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difference between typewriter and computer?
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The ratio of pure gold in 18 carat gold is 1 60% 2 75% 3 80% 4 100%
3 Answers DSSSB-Delhi Subordinate Service Selection Board,
Soda water contains 1 Nitrous acid 2 Carbonic acid 3 Carbon dioxide 4 Sulphuric acid
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