Q59 · CSIR-NET Chemistry, December 2017

Paper: CSIR-NET December 2017 · Subject: Physical Chemistry · Chapter: Data Analysis · Topic: Error Propagation · Marks: 2 · Difficulty: Medium

Repeated measurement of Pb in a lake water sample gave $3.2,5.2$ and 7.2 ppb of Pb . Standard deviation in the measurement of Pb is
(a)2 ppb
(b)4 ppb
(c)0 ppb
(d)$\sqrt{2} \mathrm{ppb}$
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
s = 2 ppb (a).

Study loop for Data Analysis

1. Practise the PYQsPrevious-year questions, with answers

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