The amount of H2S required to precipitate 1.69 g BaS from BaCl2 solution is
3.4 g
0.24g
0.34 g
0. 17 g
The standard adopted for the determination of atomic weight of elements is based on
H1
C12
O16
S32
The number of atoms in 0.1 mol of a triatomic gas is.
4. 026 × 1023
5. 02 × 1023
1.806 × 1023
6. 02 × 1013
Mass of 0.1 mole of methane is
1g
0.1g
16g
1.6g
One atom of an element weights 1. 8 × -1022g, its atomic mass is
29.9
18
108. 36
154
In a given sample of H2O2 each 100ml of solution contains 68 mg of H2O2. The molarity of the solution is
0.02m
0.2m
2m
20m
Which of the following contains maximum number of molecules ?
100cc of CO2 at NTP
150 cc of O2 at NTP
200 cc of NH3 at NTP
50 cc of SO2 at NTP
32g of O2, 2g of H2, 28g of N2 at NTP, occupy separately a volume of
1L
2L
22. 4L
2. 24L
The stoichiometry of the following reaction is K2S2O8 (aq) + 2KI (aq) → 2 K2SO4 (aq) + I2 (aq)
1:1
2:2
1:2
2:1
The largest number of molecules is in
54g of N2O5
28g of CO2
34g of H2O
46 g of CH3OH
