CBSE
Multiple Choice QuestionsAn organic compound made of C, H and N contains 20% nitrogen. Its molecular weight is
70
140
100
65
2 N HCl solution will have same molar concentration as a
4.0 N H2SO4
0.5 N H2SO4
1 N H2SO4
2 N H2SO4
In transforming 0.01 mole of PbS to PbSO4, the volume of '10 volume' H2O2 required will be
11.2 mL
22.4 mL
33.6 mL
44.8 mL
If it is assumed that decays only by emitting -and (-particles, the possible product of the decay is
The molarity of a NaOH solution by dissolving 4 g of it in 250 mL water is
0.4 M
0.8 M
0.2 M
0.1 M
In the reaction of sodium thiosulphate with I2 in aqueous medium, the equivalent weight of sodium thiosulphate is equal to
molar mass of sodium thiosulphate
the average of molar masses of Na2S2O3 and I2
half the molar mass of sodium thiosulphate
molar mass of sodium thiosulphate × 2
Which has maximum number of atoms ?
24 g of C
56 g of Fe
26 g of Al
108 g of Ag
Sodium nitrate on reduction with Zn in presence of NaOH solution produces NH3. Mass of sodium nitrate absorbing 1 mole of electron will be
7.750
10.625
8.000
9.875
An unknown element forms an oxide.What will be the equivalent weight of the element if the oxygen content is 20% by weight?
16
32
8
64
The normality of 30 volume H2O2 is:
2.678 N
5.336 N
8.034 N
6.685 N
