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Can you explain the answer of this question below:
Which of the following decomposition reaction occurs with the absorption of electrical energy?
  • A:
    Decomposition of ferrous sulphate
  • B:
    Decomposition of silver bromide
  • C:
    Decomposition of lead nitrate
  • D:
    Decomposition of water
The answer is d.
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The correct option is D because the electricity passes through water to form hydrogen gas and oxygen gas.
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Read the given passage and answer the question :A sample of water which gives lather with soap with difficulty is known as hard water, while a sample of water which gives lather with soap easily is known as soft water. Hardness of water is due to the presence of bicarbonates, sulphates and chlorides of calcium and magnesium. Hardness of water is of two types, temporary and permanent hardness. When hardness of water is due to the presence of bicarbonates of magnesium and calcium, it is called temporary hardness. When hardness of water is due to the presence of sulphates and chlorides of magnesium and calcium, it is called permanent hardness.The amount of hardness causing substances in a certain volume of water measures the extent of hardness or degree of hardness. Hardness of water is always calculated in terms of calcium carbonate although it is never responsible for causing hardness of water because of its insoluble nature. The reason for choosing calcium carbonate as the standard for calculating hardness of water is the ease in calculation as its molecular weight is exactly 100. Degree of hardness is usually expressed as parts per million (ppm).Q. “A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, a group, and each salt of which when dissolved in distilled water will make it hard.”

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Can you explain the answer of this question below:Which of the following decomposition reaction occurs with the absorption of electrical energy?A:Decomposition of ferrous sulphateB:Decomposition of silver bromideC:Decomposition of lead nitrateD:Decomposition of waterThe answer is d.
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Can you explain the answer of this question below:Which of the following decomposition reaction occurs with the absorption of electrical energy?A:Decomposition of ferrous sulphateB:Decomposition of silver bromideC:Decomposition of lead nitrateD:Decomposition of waterThe answer is d. for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Can you explain the answer of this question below:Which of the following decomposition reaction occurs with the absorption of electrical energy?A:Decomposition of ferrous sulphateB:Decomposition of silver bromideC:Decomposition of lead nitrateD:Decomposition of waterThe answer is d. covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Can you explain the answer of this question below:Which of the following decomposition reaction occurs with the absorption of electrical energy?A:Decomposition of ferrous sulphateB:Decomposition of silver bromideC:Decomposition of lead nitrateD:Decomposition of waterThe answer is d..
Solutions for Can you explain the answer of this question below:Which of the following decomposition reaction occurs with the absorption of electrical energy?A:Decomposition of ferrous sulphateB:Decomposition of silver bromideC:Decomposition of lead nitrateD:Decomposition of waterThe answer is d. in English & in Hindi are available as part of our courses for Class 10. Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free.
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