Metallurgy MCQ Practice Bits
20 The gas which is liberated during electrolysis of sodium chloride, is
1. chlorine
2. oxygen
3. nitrogen
4. hydrogen
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19 This group of elements are called chalcogens
1. 14th group
2. 16th group
3. 15th group
4. 17th group
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18 The formula of carnallite is
1. MgCo3
2. MgSo4.7H2o
3. Kcl Mgcl2.6H2o
4. Caco3.MgCo3
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17 The purpose of smelting an ore is to .......... it
1. oxidise
2. reduce
3. neutralise
4. none of these
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16 The reducing agent in thermite process is ......
1. Al
2. Mg
3. Fe
4. Si
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15 The most abundant metal in the earth's crust is .......
1. silver
2. aluminium
3. zinc
4. iron
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14 The metal that occurs in the native form is .......
1. Pb
2. Au
3. Fe
4. Hg
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13 Galena is an ore of ......
1. Zn
2. Pb
3. Hg
4. Al
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12 Forth floatation is a method used for the purification of ....... ore
1. sulphide
2. oxide
3. carbonate
4. nitrate
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11 The oil used in the froth floatation process is
1. kerosene oil
2. pine oil
3. coconut oil
4. olive oil
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