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Class 10 · Science · Easy
→Which of the following is a chemical change?
Class 10 · Science · Easy
→What type of reaction occurs when water is added to quicklime, CaO, to form calcium hydroxide?
Class 10 · Science · Easy
→Which two substances are necessary for rusting of iron?
Class 10 · Science · Easy
→What is a reaction called in which a single compound breaks down into two or more simpler substances?
Class 10 · Science · Easy
→What is a simple way to identify reduction?
Class 10 · Science · Easy
→What is a simple way to identify oxidation?
Class 10 · Science · Easy
→What is a reaction called when oxidation and reduction both occur in the same reaction?
Class 10 · Science · Easy
→Why is a magnesium ribbon rubbed with sandpaper before burning it?
Class 10 · Science · Easy
→Which process occurs to copper(II) oxide when hydrogen gas is passed over heated copper(II) oxide?
Class 10 · Science · Easy
→What is a precipitate formed in a precipitation reaction?
Class 10 · Science · Easy
→Which insoluble substance forms as a precipitate when an aqueous solution of barium chloride is mixed with an aqueous solution of sodium sulphate?
Class 10 · Science · Easy
→What is the simplest way to identify a double displacement reaction?
Class 10 · Science · Easy
→Why can copper not displace zinc from zinc sulphate solution?
Class 10 · Science · Easy
→When a zinc strip is placed in copper sulphate solution, which metal is deposited as a coating on the zinc surface?
Class 10 · Science · Easy
→When an iron nail is placed in copper sulphate solution, the colour of the solution changes from blue to which colour?
Class 10 · Science · Easy
→Which type of reaction occurs when an iron nail is placed in copper sulphate solution?
Class 10 · Science · Easy
→A student places a clean iron nail in a blue copper sulphate solution. Which observation after some time confirms that a displacement reaction has occurred?
Class 10 · Science · Easy
→Which gas is obtained in a greater volume during the electrolysis of water?
Class 10 · Science · Easy
→The photolytic decomposition of silver chloride and silver bromide is used in which application?
Class 10 · Science · Easy
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