A metal M readily forms its sulphate MSO4 which is water-soluble.
A metal M readily forms its sulphate MSO4 which is water-soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxide M(OH)2 which is soluble in NaOH solution. Then M is
(a) Mg
(b) Ba
(c) Ca
(d) Be.
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(d) : Be forms water soluble BeSO4, water insoluble Be(OH)2 and BeO. Be(OH)2 is insoluble in NaOH giving sodium beryllate Na2 BeO2.
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