Avogadro's Number NEET Questions

Physics - Kinetic Theory of Gases

Avogadro's Number MCQ Questions


1.
The value of Avogadro's number NA is:
A.
6.02 × 10²³ g
B.
6.02 × 10²⁰ mol⁻¹
C.
6.02 × 10²³ mol⁻¹
D.
1.38 × 10⁻²³ mol⁻¹
😑 View Answer Rough Work Error
ANSWER :
C. 6.02 × 10²³ mol⁻¹
2.
Avogadro's number NA is defined as the number of molecules (or atoms) present in:
A.
One litre of any gas at STP
B.
One mole of any substance
C.
One gram of any substance
D.
One kilogram of any substance
😑 View Answer Rough Work Error
ANSWER :
B. One mole of any substance
3.
The number of molecules present in 22.4 litres of any ideal gas at STP (standard temperature 273 K and pressure 1 atm) is:
A.
12.04 × 10²³
B.
6.02 × 10²⁰
C.
3.01 × 10²³
D.
6.02 × 10²³
😑 View Answer Rough Work Error
ANSWER :
D. 6.02 × 10²³
4.
The mass of 22.4 litres of any gas at STP is equal to:
A.
22.4 grams for all gases
B.
1 gram for all gases
C.
Its molecular weight expressed in grams (one mole mass)
D.
Its atomic mass in kilograms
😑 View Answer Rough Work Error
ANSWER :
C. Its molecular weight expressed in grams (one mole mass)
5.
The amount of substance that contains exactly Avogadro's number of particles is called:
A.
One mole
B.
One atomic mass unit
C.
One gram equivalent
D.
One Faraday
😑 View Answer Rough Work Error
ANSWER :
A. One mole
6.
The relation between the universal gas constant R, Boltzmann constant kB, and Avogadro's number NA is:
A.
R = NA + kB
B.
R = kB / NA
C.
R = NA / kB
D.
R = NA × kB
😑 View Answer Rough Work Error
ANSWER :
D. R = NA × kB