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9th Class Science Is Matter Around Us Pure Question Bank Case Based MCQs - Is Matter Around us Pure

  • question_answer
    In the above question, if the amount of water taken is reduced by 20 per cent, what amount of ammonium chloride would be required to prepare its saturated solution at 353 K?

    A) 86g                                          

    B) 53g

    C) 50g                                          

    D) 36g

    Correct Answer: B

    Solution :

    [b] Amount of water available = 100 - 20 = 80 g In 100 g, the amount of \[{{\operatorname{NH}}_{4}}CI\] at 353 K =66 g 80 g, the amount of \[{{\operatorname{NH}}_{4}}CI\] at 353 K = \[\frac{66}{100}\times 80\]  = 52.8 g = 53 g


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