Question

2) A water soluble substance on reacting with dilute sulphuric acid release a colourful and always gas vitrak reference on bubbling the gas through lime water the lime water turns milky but milkiness disappear when the gas is passed through water identify and write the chemical equation for the reaction involved
3)metal used for coating iron articles to prevent the rusting is added to approve solution of a compound of reddish brown metal cube the colour of the solution gas slowly discharge a) name of metal p and q
b) write the chemical equation for the reaction
c) mention the type of reaction​

Answer 1

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Calcium, strontium and barium

When exposed to sulfuric acid, a layer of insoluble sulfate is formed on each of these metals, slowing or stopping the reaction entirely. In the calcium case, some hydrogen is produced, along with a white precipitate of calcium sulfate. ☺️❤️