Question

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Answer 1

1. Aqua regia is the solution of hydrochloric aciD nitric acid . Aqua regia is the only solution that can dissolve gold in It so when gold placed in aqua regia it weight become lose and it. looks shiny due to the depletion of upper layer in aqua regia
2. They will react with each other and form water imagenes sulfate and potassium sulfate and water and the solution become orange
3. It will form. calcium sulphite and turns milky
4. Addition of sodium hydroxide to lead nitrate solution initially gives white precipitate which solublizes in excess of NaOH added.
5. It will form a white precipitate of silver chloride