MULTIPLE CHOICE QUESTIONS AND ANSWERS : SET – 3
1.  The most abundant metal in the earth"s crust is :
    (a) zinc
    (b) copper
    (c) aluminium
    (d) iron
Ans: (c)
2.  Which of the following is the second most abundant metal in the earth"s crust?
    (a) Copper
    (b) Aluminium
    (c) Iron
    (d) Zinc
Ans: (c)
3.  Arrange the following metals in the decreasing order of their relative abundance in earth"s crust after aluminium:
          1) Calcium
          2) Iron
          3) Sodium
          4) Magnesium
    (a) 1, 4, 2, 3
    (b) 1, 2, 4, 3
    (c) 2, 1, 3, 4
    (d) 2, 1, 4, 3
Ans: (c)
4.  The most malleable metal is: [CDS 1992]
    (a) silver
    (b) gold
    (c) aluminium
    (d) sodium
Ans: (b)
5.  Air is a/an : [Teachers" Exam,1994]
    (a) compound
    (b) element
    (c) mixture
    (d) electrolyte
Ans: (c)
6.  Balloons are filled with: [RRB 1991]
    (a) helium
    (b) oxygen
    (c) nitrogen
    (d) argon
Ans: (a)
7.  Which of the following is used in beauty parlours for hair setting?
    (a) Chlorine
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