The oxygen obtained from 72 kg of water is
72 kg
46 kg
50 kg
64 kg
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 stoichiometry of the following reaction is K2S2O8 (aq) + 2KI (aq) → 2 K2SO4 (aq) + I2 (aq)
1:1
2:2
1:2
2:1
32g of O2, 2g of H2, 28g of N2 at NTP, occupy separately a volume of
1L
2L
22. 4L
2. 24L
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
1 g atom N2 represents
6.02 × 1023 N2 molecules
22. 4 L of N2 at STP
11. 2 L of N2 at STP
28 g of N2
What is the mass of 1 mole of electron?
6.02 × 1015
8.1 × 1022
0.55 mg
7. 52 × 1023
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
How much volume of oxygen at STP in liters required to burn 4g of methane gas completely?
11.2
5.6
2.8
8
What is the stoichiometric coefficient of Ca in the reaction?
Ca + Al3+ → Ca2+ + Al
2
1
3
4