Question

The exact value is 150m. A students record it as 140.1m in 1st turn and 140.8m in the 2^nd turn. Comment his/her recordings.

(a) precise

(b) accurate

(c) neither precise nor accurate

(d) both precise and accurate

The question was posed to me during an interview.

My enquiry is from Uncertainty in Measurement in chapter Chemistry Basic Concepts of Chemistry – Class 11

Answer 1

Correct answer is (a) precise

Easiest explanation: These values are precise as they are close to each other but are not accurate. Precision is referred to as the closeness of different measurements for the same quantity. Accuracy is the degree to which it’s taken as standard or almost equivalent to it.