EASY
MHT-CET
IMPORTANT
Earn 100

If the Avogadro number NA, is changed from 6.022 × 1023 mol-1 to 6.022 × 1020 mol1 this would change

30.77% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

MEDIUM
MHT-CET
IMPORTANT
Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 moles of XY2 weighs10 g and 0.05 moles of X3Y2 weighs 9 g, the atomic weights of X and Y are
MEDIUM
MHT-CET
IMPORTANT
Which of the following gives the correct order of increasing masses?
(Atomic mass: N = 14, O = 16, Cu = 63).
I. 1 molecule of oxygen.
II. 1 atom of nitrogen.
III. 1×10-10 g molecular weight of oxygen.
IV. 1×10-10 g atomic weight of copper.
MEDIUM
MHT-CET
IMPORTANT
What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene?