The order of ionization enthalpy for B, Al and Ga is:

B<Al<Ga

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Ga<Al<B

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B>Al>Ga

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B>Al<Ga

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Solution

The correct option is D
B>Al<Ga

B>Al<Ga

The trend in ionization enthalpy is because there is decrease in Ionisation enthalpy from B to Al due to increase in size and from Al to Ga. Ga has more ionisation energy than Al due to uneffective screening effect.

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Which of the following is the correct decreasing order of atomic radius for following elements?
B, Al, Ga, In

B, A l

G a

H_{2}

A l (m e t a l) H C l (a q .) - ---- \to^{'} X^{'} + G a s^{'} P^{'}

A l (m e t a l) N a O H (a q .) - ------ \to + H_{2} O^{'} Y^{'} + G a s^{'} Q^{'}

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