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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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Answer» (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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