Number of moles of Mn${\mathrm{O}}_4^{-}$ 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 $\to$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 $\to$Zn(OH)(NO₃) + H₂O :

1. Formula mass/1

2. Formula mass/2

3. 2 x formula mass

4. 3 x formula mass