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Reaction of Metals with Acid

Name the foll...

Question

Name the following metals:
A metal which is unaffected by dilute or concentrated acids.

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Solution

Metals like gold, silver and platinum are unaffected by dilute or concentrated acids but these are soluble in aqua regia. Hence they are used in making jewellery.

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(b) Name any two acids which can behave like acid Y.
(c) Name the gas Z.
(d) Is the gas Z lighter than or heavier than air?
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