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Q.

Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is:

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a

Mg < Ca < Cl < P

b

Cl < P < Mg < Ca

c

P < Cl < Ca < Mg

d

Ca < Mg < P < Cl

answer is B.

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Detailed Solution

The relative positions of these elements in periodic table:

Mg	P	Cl
Ca

Order of atomic radius:

Ca > Mg

Mg > P > Cl

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