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NEET Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव Question Bank Self Evaluation Test - States of Matter

  • question_answer
    A bubble of the gas released at the bottom of a lake increases to eight times the original volume when it reaches at the surface. Assuming that the atmospheric pressure is equivalent to pressure exerted by a column of water 10m high, what is the depth of the lake

    A) 80 m                

    B) 90 m

    C) 10 m                

    D) 70 m

    Correct Answer: D

    Solution :

    [d] Let V be the original volume of bubble. The final volume will be 8 V. Let p be the atmospheric pressure and \[{{p}_{1}}\] the pressure at the bottom \[\therefore p\times 8V={{p}_{1}}\times V;\] \[8p={{p}_{1}}\] \[{{p}_{1}}\]= atmospheric pressure + pressure due to water lake \[=p+7p\] The p =10m high, the 7p will be = 70m high So the depth = 70m


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