The molecular weight of O2 and SO2 are 32 and 64 respectively. At 15o C and 150 mmHg pressure, 1 L of O2 contains 'N' molecules. The number of molecules in 2 L of SO2 under the same conditions of temperature and pressure will be
N/2
N
2 N
4 N
Number of moles of required to oxidise one mole of ferrous oxalate completely in acidic medium will be
0.6 mole
0.4 mole
7.5 moles
0.2 mole
The total number of valence electrons in 4.2 g of ion is (NA is the Avogadro's number)
2.1 NA
4.2 NA
1.6 NA
3.2 NA
The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is
4/5
2/5
1
3/5
Ratio of Cp and Cv of a gas 'X' is 1.4. The number of atoms of the gas 'X' present in 11.2 L of it at NTP will be
One litre hard water contains 12.00 mg Mg2+ . Milli equivalents of washing soda required to remove its hardness is
12.16
1 x 10 -3
12.16 x 10 -3
Liquid benzene (C6H6) burns in oxygen according to the equationHow many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene ?(Mol wt O2 = 32, C6H6 = 78)
74 L
11.2 L
22.4 L
84 L
Boron has two stable isotopes, . Calculate average atomic weight of boron in the periodic table.
10.8
10.2
11.2
10.0
The percentage weight of Zn in white vitriol [ZnSO4 . 7 H2O] is approximately equal to (Zn = 65, S = 32, O = 16 and H = 1 )
33.65%
32.56%
23.65%
22.65%
0.24 g of a volatile gas, upon vaporisation, gives 45 mL vapour at NTP. What will be the vapour density of the substance?(Density of H2 = 0.089)
95.93
59.93
95.39
5.993
