Chapter-1 - 11th - Basic Concepts Preparation Multiple Questions and Answers.




11.The mass of one mole of electron is:
A. 1.008 mg
B. 0.184 mg
C. 0.54 mg
D. 0.054 mg

12.27 g of Al will react with how much mass of O2 to produce Al2O3:
A. 8 g of oxygen
B. 16 g of oxygen
C. 32 g of oxygen
D. 24 g of oxygen

13.The number of moles of NO2 which contains 16 g of oxygen:
A. 0.25
B. 0.5
C. 1
D. 1.5

14.The volume occupied by 2.0 g of Ne at STP:
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 112 cm3

15.A sample in the ionization chamber of mass spectrometer is ionized by:
A. Electrons
B. Proton
C. Neutron
D. Nucleus

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