Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? (A) Lime stone and alumina (B) Silica and alkalies (C) Alumina and iron (D) Alkalies and magnesium

Which of the following pairs gives a correct combination of the useful and harmful constituents
respectively of a good brick earth?
(A) Lime stone and alumina
(B) Silica and alkalies
(C) Alumina and iron
(D) Alkalies and magnesium
by

1 Answer

Answer :

Answer: Option B
by

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