A homogenous mixture of two or more metal or a metal and non-metal is known as _____. a) alloy b)element c)mineral d)compound Answer : a) alloy...
The correct sequence of steps involved in extraction of metal from its ore is a) removal of impurities, purify metal, reduction of ore b) purify metal, removal of impurities, reduction of metal ore . c ... of metal , reduction d) removal of impurities from ore , reduction of ore , refining of metal Answer : d) removal of impurities from ore , reduction of ore , refining of metal...
A rock is (A)a naturally occurring, hard, solid substance (B) any hard, solid substance on earth (C)an aggregate of minerals (D)only produced by cooling of magma Answer : an aggregate of minerals ...
The non-metal used in batteries is a) phosphorous b)nitrogen c) carbon d)sulphur Answer : c) carbon...
Which of the following non-metal reacts and catches fire on exposure to air? a) phosphorous b)nitrogen c)sulphur d)hydrogen Answer : a) phosphorous...
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