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The following are some statements about IA group elementsi) The radioactive IA group element is Frii) Alkali metals donot occur in free state because of their high reactivityiii) 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 radioactive metal→ Due to high reactivity of alkalimetals they can't occur in free state, they are available in combined state→ % Abundance by weight : Na > K > Rb > Cs > Li

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