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NEET Sample Paper NEET Sample Test Paper-33

  • question_answer
    \[400\text{ }ml.\]of standard gold sol is just prevented from coagulation by the addition of \[0.96\text{ }g\]of starch before adding 1 ml. of 10% \[NaCl\]solution the gold number will be:

    A)  \[2.4\]                  

    B)  76

    C)  240                

    D)  24

    Correct Answer: D

    Solution :

    \[\because \] 400 ml of gold sol require starch = 960 mg \[\therefore \] 10 ml of gold sol require starch \[=\frac{960}{400}\times 10=24\]


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