Question

d. 2 min : 20 sec find simplest form

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Answer 1

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Acidic flux are those flux which comes from substances like Lewis acid such as SiO2, H3PO4, HCl etc. Acidic flux is used in metal welding or extractive metallurgy or Smelting. Silica (SiO2) is used to remove basic earthly impurities (gangue) such as lime (CaO) or MgO.

Answer 2

Ratio of two quantities can be calculated only when they are of same units.

So, converting 3minutes54seconds into seconds, we get 3×60+54=234seconds

And, converting 2minutes6seconds into seconds, we get 2×60+6=126seconds

Ratio of given quantities =234:126

Simplifying it by dividing by 6, we get the ratio =39:21

Further simplifying it by dividing by 3, we get the ratio =13:7