Some Basic Concepts Of Chemistry Question 302
Question: Given $ P=0.0030m $ , $ Q=2.40m $ , $ R=3000m $ , Significant figures in $ P,,Q $ and $ R $ are respectively [Pb. CET 2002]
Options:
A) 2, 2, 1
B) 2, 3, 4
C) 4, 2, 1
D) 4, 2, 3
Show Answer
Answer:
Correct Answer: B
Solution:
Given $ P=0.0030m $ , $ Q=2.40m $ & $ R=3000m $ in $ P(0.0030) $ initial zeros after the decimal point are not significant.
Therefore, significant figures in $ P(0.0030) $ are 2.
Similarly in $ Q(2.40) $ significant figures are 3 as in this case final zero is significant. In $ R=(3000) $ all the zeroes are significant hence, in $ R $ significant figures are 4.
