Government CDS Question: Download Government CDS PDF

Which one of the following is used as a mordant in dyeing and tanning industry?
(A) Magnesium oxide
(B) Magnesium carbonate
(C) Magnesium chloride
(D) Magnesium sulphate

(D) Magnesium sulphate

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If you are doing teaching with better scale than armed forces than why do you want to join armed forces?	By which one of the following, an old written material which cannot be read easily, can be read? (A) γ–rays (B) X–rays (C) IR–rays (D) Radiofrequency waves