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Class 10 · Science
→A gas evolved by adding acid to a carbonate turns lime water milky. Which gas is it?
Class 10 · Science
→Why is hydrogen gas generally not evolved when dilute hydrochloric acid is added to copper?
Class 10 · Science
→The gas evolved in the reaction of zinc with dilute acid gives a pop sound near a burning splint. Which gas is confirmed?
Class 10 · Science
→An unknown solution turns blue indicator paper red and gives a gas with magnesium. What is the nature of the solution?
Class 10 · Science
→Why will the same gas change colour on moist blue indicator paper?
Class 10 · Science
→Dry hydrogen chloride gas has no effect on dry blue indicator paper. What is the most correct reason?
Class 10 · Science
→Why should acids or bases not be identified by taste in a laboratory?
Class 10 · Science
→Which gas is formed at the cathode in the chlor-alkali process?
Class 10 · Science
→Which gas is formed at the anode in the chlor-alkali process?
Class 10 · Science
→What are the main products obtained in the chlor-alkali process?
Class 10 · Science
→The chlor-alkali process is done by electrolysis of what?
Class 10 · Science
→What is the main solid product formed on heating baking soda?
Class 10 · Science
→How does baking powder help food rise?
Class 10 · Science
→Which gas does baking soda give on reacting with an acid?
Class 10 · Science
→Washing soda softens hard water by removing which ions?
Class 10 · Science
→What is meant by water of crystallisation?
Class 10 · Science
→Why does the blue colour of copper sulphate disappear on heating?
Class 10 · Science
→What causes the blue colour of copper sulphate crystals?
Class 10 · Science
→Why does plaster of Paris become hard when water is added?
Class 10 · Science
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