01.
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Which is the heaviest metal occurring in nature ? Ans : Uranium |
02.
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Which is the impurity present in the ore ? Ans : Gangue |
03.
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Which is the lightest and simplest element ? Ans : Hydrogen |
04.
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Which is the metal having highest melting point ? Ans : Tungsten |
05.
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Which is the method used for refining metals containing volatile impurities ? Ans : Oxidation |
06.
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Which is the mineral from which the metal is conveniently and economically extracted ? Ans : Ore |
07.
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Which is the most abundant metal in the earth crust ? Ans : Aluminum |
08.
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Which is the most abundant metal present in blood ? Ans : Potassium |
09.
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Which is the Most abundant metal present in developed animals ? Ans : Calcium |
10.
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Which is the most common halide by weight in earth crust ? Ans : Fluoride |
11.
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Which is the poorest conductor of heat ? Ans : Lead |
12.
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Which is the process of heating the ore below its melting point in absence of air to remove volatile impurities ? Ans : Calcination |
13.
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Which is the purest form of crystalline rock ? Ans : Diamond |
14.
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Which is used for making integrated chips ? Ans : Silicon and Germanium |
15.
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Which is used to make artificial rain ? Ans : Silver iodide |
16.
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Which iss the purest type of iron that contains least amount of carbon ? Ans : Wrought Iron |
17.
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Which metal regulates blood pressure in human beings ? Ans : Sodium |
18.
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Which natural element having highest atomic weight ? Ans : Uranium |
19.
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Which s the metal having lowest melting point ? Ans : Mercury |
20.
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Zinc coated with iron is called ? Ans : Galvanized Iron |
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