Bleaching powder is made from
1 Sulphur dioxide and gypsum
2 Chlorine and charcoal
3 Soda ash and lilme
4 Lime and chlorine
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The highest grade of coal whose surface is shining and has the highest calorific value, is 1 Bituminous 2 Lignite 3 Anthracite 4 Peat
1 Answers Neyveli Lignite Corporation,
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Which among the following is a positively charged particle emitted by a radioactive element? 1 Alpha ray 2 Beta ray 3 Gamma ray 4 Cathode ray
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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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Bell metal is an alloy of 1 Brass an nickel 2 Zinc and copper 3 Tin and copper 4 None of these
Which of the following is a chemical change? 1 Oxidation 2 Reduction 3 Sublimation 4 Decomposition
Which of the following metals was first discovered by man? 1 Bronze 2 Silver 3 Iron 4 Copper
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Brass is an alloy of 1 Nickel and copper 2 Zinc and copper 3 Nickel and zinc 4 Nickel and silver