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Question:

Match the following items in column I with the corresponding items in column II.
Column I
Column II
(i) Na2CO3.10H2O
(A) Portland cement ingredient
(ii) Mg(HCO3)2
(B) Castner Keller process
(iii) NaOH
(C) Solvay process
(iv) Ca3Al2O6
(D) Temporary hardness

(i)→(C);(ii)→(B);(iii)→(D);(iv)→(A)

(i)→(D);(ii)→(A);(iii)→(B);(iv)→(C)

(i)→(C);(ii)→(D);(iii)→(B);(iv)→(A)

(i)→(B);(ii)→(C);(iii)→(A);(iv)→(D)

Solution:

Na2CO3.10H2O → Solvay process
Mg(HCO3)2 → Temporary hardness as it is bicarbonate salt of Mg.
NaOH → Castner - Kellner method is used to produce NaOH by electrolysis of aqueous NaCl.
Ca3Al2O6 → Portland cement component.