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Q.

In the halogen group, chlorine is a gas, bromine is a liquid and iodine exists as solid crystals. Then the next halogen astatine (At) would be

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a

Solid at room temperature

b

Having higher electronegativity

c

Liquid with higher ionisation enthalpy

d

Least atomic size

answer is A.

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Detailed Solution

The halogen group is quite diverse. It includes elements that occur in three different states of matter at room temperature. Fluorine and chlorine are gases, bromine is a liquid, and iodine and astatine are solids.

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