Question

Choose the incorrect statement.

• A. Change in unit does not change the number of significant figure.
• B. In $4.700m=4700mm$ a change of significant figure occur from $4$ to $2$ due to change in unit.
• C. In $4.700m=4.700\times 10^{3}cm$, there is no change in the number of significant figures.
• D. None of the above

Answer 1

Answer: (B)

As per the rule for determining the number of significant figures, there is no change in number of significant figures on changing the units.
$\therefore$ In $4.700m=4700mm$, there is no change in significant figures i.e. it remains same as $4$ .
Thus, the statement given in option (b) is incorrect, rest are correct.