Alkali metals are soft and have low melting point and boiling point due to
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a
Inner atomic bonds are weak
b
Inter atomic bonds are strong
c
Low ionisation potential
d
Smaller atomic size
answer is A.
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Detailed Solution
Due to their large size and the presence of only one valency electron, they have weak inter atomic attractions [metallic bond] and hence they possess low melting and boiling point and they are soft in nature