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  • Identify the correct statements. The chlorides of group 2 metals -Option: 1 Increase in lattice enthalpy from <img alt="\mathrm{BeCl}_{2}"

Identify the correct statements.

The chlorides of group 2 metals -

Option: 1

Increase in lattice enthalpy from \mathrm{BeCl}_{2} to \mathrm{BaCl}_{2}


Option: 2

Decrease in m.p. from \mathrm{BeCl}_{2} to \mathrm{BaCl}_{2}


Option: 3

Are all insoluble except \mathrm{BaCl}_{2}


Option: 4

Are all hygroscopic in nature


Answers (1)

best_answer

As we move down the group, due to increase in cation size, their tendency to make ionic compounds increases. Therefore, the lattice energy decreases with increase in the size of the cation.; their melting point increase as we move down the group; solubility increases down the group. Hence, (1), (2) and (3) are incorrect.

However, the chlorides of group 2 metals are hygroscopic (moisture absorbing) and the tendency to form halide hydrates gradually decreases, for example , \mathrm{CaCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}, \mathrm{SrCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} and \mathrm{BaCl}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O} down the group

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vishal kumar

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