Question

Which of the following statement is not correct ?

• A. KOH is a stronger alkali than NaOH.
• B. Milk of magnesia is aqueous suspension of Mg(OH)2.
• C. MgO is a refractory material used for lining electrical furnaces.
• D. MgCl2.6H2O on heating yields Mg(OH)2.

Answer 1

Answer: (D)

MgCl2.6H2O on heating yields Mg(OH)2.

Answer 2

MgCl2 being covalent in nature, gets hydrolysed by the water of crystallisation present, into MgO.

MgCl2 . 6H2O $\longrightarrow$MgO + 2HCl + 5H2O