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प्रश्न
Name the following:
A chemical in which gold can be dissolved.
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उत्तर
Gold can be dissolved in aqua regia which is mixture of three parts of conoentrated hydrochloric acid and one part of concentrated nitric acid.
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संबंधित प्रश्न
Write an equation for the reaction of hydrochloric acid on magnesium foil.
Write an equation for the reaction of aqueous hydrochloric acid on lead nitrate solution.
Name an element which reacts with hydrogen to form a compound which is strongly acidic in water.
Write balanced equation for the following reaction:
Copper oxide and dilute hydrochloric acid.
Write balanced equcation for the following reaction:
Manganese (IV) oxide and concentrated hydrochloric acid.
What is the property of concentrated sulphuric acid (H2SO4) which allows it to be used in the preparation of hydrogen chloride (HCl) and nitric acid (HNO3)?
How will you distinguish between the two black samples, CuO and MnO2 with a chemical test?
Write the balanced equation for the reaction of dilute hydrochloric acid with the following:
Iron (II) sulphide
Write observation:
A small piece of zinc is added to dilute hydrochloric acid.
State your observation when:
Decomposition of bicarbonates by dil. H2SO4
2NaHCO3 + H2SO4 → Na2SO4 + 2H2O + 2CO2
2KHCO3 + H2SO4 → K2SO4 + 2H2O + 2CO2
