Number of moles of Mn required to oxidise one mole of ferrous oxalate completely in acidic medium will be
1. 0.6 mole
2. 0.4 mole
3. 7.5 moles
4. 0.2 mole
5mL of N HCl, 20 mL of N/2 H2SO4 and 30mL of N/3 HNO3 are mixed together and volume made one litre. The normality of the resulting solution is:
1. N/5
2. N/10
3. N/20
4. N/40
When a metal is burnt, its mass is increased by 24 percent. The equivalent mass of the metal will be:
1. 25
2. 24
3. 33.3
4. 76
1g of pure calcium carbonate was found to require 50 mL of dilute HCl for complete reactions. The strength of the HCl solution is given by:
1. 4N
2. 2N
3. 0.4N
4. 0.2N
The equivalent mass of H3PO4 in the following reaction is,
H3PO4 + Ca(OH)2 CaHPO4 + 2H2O
1. 98
2. 49
3. 32.66
4. 40
1.520g of the hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent mass of metal is:
1. 1.520
2. 0.995
3. 19.00
4. 9.00
0.5 g of fuming H2SO4 (oleum) is diluted with water. This solution is completely neutralised by 26.7 mL of 0.4 N NaOH. The percentage of free SO3 in the sample is:
1. 30.6%
2. 40.6%
3. 20.6%
4. 50%
One g of a mixture of Na2CO3 and NaHCO3 consumes y equivalent of HCl for complete neutralisation. One g of the mixture is strongly heated, then cooled and the residue treated with HCl. How many equivalent of HCl would be required for complete neutralisation?
1. 2y equivalent
2. y equivalent
3. 3y/4 equivalent
4. 3y/2 equivalent
The chloride of a metal contains 71% chlorine by mass and the vapour density of it is 50. The atomic mass of the metal will be:
1. 29
2. 58
3. 35.5
4. 71
The equivalent mass of Zn(OH)2 in the following reaction is equal to its,
Zn(OH)2 + HNO3 Zn(OH)(NO3) + H2O :
1. Formula mass/1
2. Formula mass/2
3. 2 x formula mass
4. 3 x formula mass