CS Executive · Economic, Commercial and Intellectual Property Laws · Legal Metrology
A lab technician at an Indian firm lists the base units under the Legal Metrology Act, 2009 as: metre, kilogram, second, ampere, kelvin, candela and mole. Which physical quantity is paired with the unit 'mole' in the Act?
The mole is the base unit of amount of substance under the Legal Metrology Act, 2009. Section 5(1) pairs each quantity with a base unit: candela with luminous intensity, kelvin with thermodynamic temperature, and ampere with electric current.
- ALuminous intensity
- BThermodynamic temperature
- CAmount of substanceCorrect
- DElectric current
Explanation
Section 5(1)(vii) states that the base unit of amount of substance shall be the mole. Candela is for luminous intensity, kelvin for thermodynamic temperature and ampere for electric current, so the other options mismatch.
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