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Question
Metals form basic hydroxides. Which of the following metal hydroxide is the least basic?
Metals form basic hydroxides. Which of the following metal hydroxide is the least basic?
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Solution
The correct option is D Mg(OH)2
Solution:
Basicity of hydroxides of alkaline earth metals
Alkaline earth metals burn in oxygen to form monoxides which are basic in nature (except BeO) and react with water to form sparingly soluble hydroxides.
The basic character of these hydroxides increases with an increasing atomic number from Mg(OH)2 to Ba(OH)2.
Because as we go down the group from Mg to Ba, M--O bond becames weaker . It occurs due to increase in metallic character down the group which led to more basic metal oxide hydroxide formation.
Hence, Magnesium hydroxide is the weakest base among the given options.
Option (A) is correct.
Solution:
Basicity of hydroxides of alkaline earth metals
Alkaline earth metals burn in oxygen to form monoxides which are basic in nature (except BeO) and react with water to form sparingly soluble hydroxides.
The basic character of these hydroxides increases with an increasing atomic number from Mg(OH)2 to Ba(OH)2.
Because as we go down the group from Mg to Ba, M--O bond becames weaker . It occurs due to increase in metallic character down the group which led to more basic metal oxide hydroxide formation.
Hence, Magnesium hydroxide is the weakest base among the given options.
Option (A) is correct.
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