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?
(i) Mg(OH)2
(ii) Ca(OH)2
(iii) Sr(OH)2
(iv) Ba(OH)2
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(i) Mg(OH)2 As the ionization enthalpy increases from Mg →Ba, the M – O bond becomes weaker and weaker down the group and hence basicity increases down the group. Thus, Mg(OH)2 is least basic.
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