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Chemical Reacti...

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  • Question 1
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    Which of the following statements is true about the precipitation reactions?

  • Question 2
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    Which of the following statements about redox reactions is/are correct?

    (i)   A substance is said to be reduced if it gains oxygen during a reaction.
    (ii)  A substance is said to be oxidised if it gains electrons during a reaction.
    (iii) A substance is said to be reduced if it loses oxygen during a reaction.
    (iv) A substance is said to be reduced if it gains hydrogen during a reaction.

  • Question 3
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    Consider the following reaction:

    CuO (s) + H2 (g) Cu (s) + H2O ()

    Which of the following statements is true about the given reaction?

  • Question 4
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    During the process of digestion, the components of food break down into simpler substances. Hence, digestion is a _____________ reaction.

  • Question 5
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    Which of the following compounds is obtained along with quicklime during the thermal decomposition of limestone?

  • Question 6
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    How will you categorise the reaction of sodium sulphate with barium chloride?

  • Question 7
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    Which of the following elements will undergo corrosion?

  • Question 8
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    Which of the following is not a combination reaction?

  • Question 9
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    Which of the following is an example of a combination reaction?

  • Question 10
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    CH4  C + 2H2 

    Which of the following statements is correct regarding the above reaction?

  • Question 11
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    Which of the following is/are changed while balancing an equation?

  • Question 12
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    Which of the following compounds is used for white-washing?

  • Question 13
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    Which of the following is not a single displacement reaction?

  • Question 14
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    Which of the following statements is not correct?

  • Question 15
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    Which of the following statements is false about the decomposition reactions?

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