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Class 10 · Science · Expert
→What is the correct set of products when barium chloride and sodium sulphate solutions are mixed?
Class 10 · Science · Expert
→If metal A displaces metal B from an aqueous solution of its salt, but metal B does not displace metal A from a solution of its salt, which metal is more reactive?
Class 10 · Science · Expert
→When an iron nail is immersed in a blue copper sulphate solution, the blue colour fades. This is mainly due to which ionic change?
Class 10 · Science · Expert
→Why does copper deposit on the surface of an iron nail placed in copper sulphate solution?
Class 10 · Science · Expert
→Why can the solution turn green when an iron nail is placed in copper sulphate solution?
Class 10 · Science · Expert
→What is the main purpose of adding dilute sulfuric acid during the electrolysis of water?
Class 10 · Science · Expert
→A student places a clean iron nail in a blue copper sulphate solution. Which observation most clearly shows that a displacement reaction has occurred?
Class 10 · Science · Expert
→What is the correct order of gases produced at the anode and cathode during the electrolysis of water?
Class 10 · Science · Expert
→During electrolysis of water, if the volume of oxygen produced is 12 mL at the same temperature and pressure, what volume of hydrogen is produced?
Class 10 · Science · Expert
→Why are light-sensitive silver salts, such as silver chloride, stored in dark-coloured bottles?
Class 10 · Science · Expert
→When white silver chloride g( gCl) is exposed to sunlight, it turns grey. Which product is responsible for this colour change?
Class 10 · Science · Expert
→A student places a zinc strip in a blue copper sulphate solution and says that the blue colour fades because copper is more reactive than zinc. Which correction to this statement is correct?
Class 10 · Science · Expert
→On heating lead nitrate, brown fumes indicate the presence of which gas?
Class 10 · Science · Expert
→Which substance is the yellow solid residue formed on thermal decomposition of lead nitrate?
Class 10 · Science · Expert
→Which pair correctly identifies the brown gas and the colourless gas formed when lead nitrate is heated?
Class 10 · Science · Expert
→During the thermal decomposition of calcium carbonate, the evolved gas is passed through lime water, which turns milky. This confirms the presence of which gas?
Class 10 · Science · Expert
→In the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), which of the following statement is correct?
Class 10 · Science · Expert
→Why is the reaction between calcium oxide and water called an exothermic combination reaction?
Class 10 · Science · Expert
→What is the correct name of the product formed when water is added to calcium oxide?
Class 10 · Science · Medium
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