Q .     If the value of Avogadro number is `6.023 \times 10^{23} mol^{-1}` and the value of Boltzmann constant is `1.380 \times 10^{-23} JK^{-1}`, then the number of significant digits in the calculated value of the universal gas constant is :

JEE 2014 ADVANCED Paper - 1
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