IIT-JEE 2010 · Paper 1 · Chemistry Q26

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ChemistryInteger+3Question 26 of 84

A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0 mL. The number of significant figures in the average titre value is

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Answer and worked solution

Official answer: 3

Average. $\dfrac{25.2+25.25+25.0}3=25.15$ mL.

Precision. The result cannot be more precise than the least precise reading, which has one decimal place (25.2, 25.0). So the average is reported as 25.2 mL: 3 significant figures.

Answer: 3

Topics:Mole concept

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IIT-JEE 2010 · Paper 1, Chemistry question 26