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Q.

The following are some statements about IA group elements

i) The radioactive IA group element is Fr

ii) Alkali metals do not occur in free state because of their high reactivity

iii) The most abundant alkali metal in the earth is Na

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a

only ii correct

b

i and ii are correct

c

All are correct

d

i and iii are correct

answer is C.

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Detailed Solution

  • Among Alkali metals Fr is radio active.
  • Due to high reactivity of Alkali metals they can't occur in free state, they are available in combined state
  • % Abundance by weight Na > k> Rb > Cs
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