If empirical formula of an organic compound is CH2O then its molecular formula can be
C2H2O2
C2H4O
C3H6O
C6H12O6
One mole of H2SO4 = ____ moles of oxygen.
32
16
8
4
How many times on atom of sulphur is heavier than an atom of carbon?
32 times
12 times
8/3 times
12/32 times
Which law explains Gay-Lussac's law?
Charles
Boyle
Avogadro
Hunds
A gas cylinder of capacity of 20dm3 is filled with gas 'X' the mass of which is 10g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative mass of the gas is
5
10
15
20
The volume occupied by one mole of a gas at S.T.P. is known as
Atomic volume
Molar volume
Gaseous volume
Thermal volume
A mole of CH4 contains how many grams of molecules?
16 g
18 g
12 g
14 g
The relative molecular mass of Na2S2O3.5H2O is
250 a.m.u.
250 g
248 a.m.u.
248 g
The gas law which relates the volume of a gas to the number of molecules of the gas is
Avogadro's law
Gay Lussac's law
Boyle's law
Charle's law
Sulphur is molecule is composed of eight similar atoms hence it is
Diatomic
Octatomic
Decatomic
Deciatomic
