Overview
Which are the major gaseous components of air?
Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as an indicator. The number of moles of Mohr’s salt required per mole of dichromate is
(a) 3 (b) 4 (c) 5 (d) 6 What is the trade name for fluoride ore of calcium?
The first scientific definition of a chemical element was made in which book