NEET Sample Paper NEET Sample Test Paper-14

  • question_answer How many grams of ice at \[0{}^\circ C\] can be melted by the addition of 500 J of heat? (The molar heat of fusion for ice is\[6.02\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\])

    A)  0.0831 g                    

    B)  1.50 g

    C)  3.01 g                        

    D)  12.0 g

    Correct Answer: B

    Solution :

    6020 J is required to melt 18 g of ice at \[0{}^\circ C\]. 1 J would melt \[=\frac{18}{6020}g\]of ice at \[0{{\,}^{o}}C\]             \[\approx 3\times {{10}^{-3}}g\] 500 J would melt \[=500\times 3\times {{10}^{-3}}g\]of ice at \[0{{\,}^{o}}C.\] Answer = 1.5 g. Hence, the correct option is [b].

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