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Class 10 · Science · Medium
→Which of the following reactions is an example of both a double displacement reaction and a precipitation reaction?
Class 10 · Science · Medium
→Why is the reaction in which barium sulphate forms on mixing aqueous barium chloride and aqueous sodium sulphate called a precipitation reaction?
Class 10 · Science · Medium
→What visible change occurs when aqueous solutions of sodium sulphate and barium chloride are mixed?
Class 10 · Science · Medium
→If metal A displaces metal B from its salt solution, what is the correct conclusion about metal A?
Class 10 · Science · Medium
→Why does a reddish-brown layer form on an iron nail placed in copper sulphate solution?
Class 10 · Science · Medium
→When an iron nail is placed in copper sulphate solution, which salt is mainly present in the green solution formed?
Class 10 · Science · Medium
→During the electrolysis of water, which gas is obtained in a larger volume at the cathode?
Class 10 · Science · Medium
→Why are silver chloride and silver bromide stored in dark-coloured bottles?
Class 10 · Science · Medium
→When a single compound breaks down into two or more simpler substances on heating, what is the reaction called?
Class 10 · Science · Medium
→Which statement is correct about the reaction between calcium oxide and water?
Class 10 · Science · Medium
→Which pair of products is formed when calcium carbonate is heated?
Class 10 · Science · Medium
→In the balanced chemical equation for the formation of water, \(2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}\), what is the ratio of hydrogen molecules to oxygen molecules?
Class 10 · Science · Medium
→When the reaction of magnesium burning in oxygen is balanced, what coefficient is placed before magnesium oxide?
Class 10 · Science · Medium
→In an experiment, bubbles formed and the container became cold. Which is the most cautious conclusion based on these observations?
Class 10 · Science · Medium
→In which type of decomposition reaction does light energy help break down a compound?
Class 10 · Science · Medium
→When water is added to a coloured solution, its colour becomes lighter, but no new substance is formed. What does this change represent?
Class 10 · Science · Medium
→Which statement correctly explains the relation between oxidation and reduction?
Class 10 · Science · Medium
→In the equation of which type of reaction is writing state symbols such as (aq) and (s) especially useful to show that a solid product has separated from a solution?
Class 10 · Science · Medium
→If a chemical equation has 2 oxygen atoms on the reactant side and 1 oxygen atom on the product side, what is the equation?
Class 10 · Science · Medium
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