Which one of the following metals is immune to corrosion by air, water, hydrochloric acid and nitric acid; but is soluble in aqua regia? w) gold x) silver y) magnesium z) nickel Answer : ANSWER: W -- GOLD...
What is the common name given to a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid? Answer : ANSWER: AQUA REGIA...
Aqua regia is a 1 : 3 mixture, by volume, of (1) conc. nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and conc. sulphuric acid (4) conc. sulphuric acid and conc. nitric acid Answer : conc. nitric acid and conc. hydrochloric acid...
Gold dissolves in (1) Hydrochloric acid (2) Nitric acid (3) Aqua-regia (4) Acetic acid Answer : Aqua-regia...
Which of the following is the weakest acid? w) hydrochloric acid x) hydrofluoric acid y) sulfuric acid z) nitric acid Answer : ANSWER: X -- HYDROFLUORIC ACID...
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