The following titration method is given to determine the total content of the species with variable oxidation states. Answer the question given at the end of it. 

A quantity of 25.0 mL of solution containing both Fe²⁺ and Fe³⁺ ions is titrated with 25.0 mL of 0.02 M KMnO₄? (in dilute H₂?SO₄?). As a result, all of the Fe²⁺ ions are oxidised to Fe³⁺ ions. Next 25 mL of the original solution is treated with Zn metal. Finally, the solution requires 40.0 mL of the same KMnO4? solution for oxidation to Fe³⁺.

MnO₄?⁻ + 5Fe²⁺ + 8H⁺→Mn²⁺ + 5Fe³⁺+4H₂?O
The molar concentration of Fe2+ in the original solution is :

1) 0.01M

2) 0.02M

3) 0.10M

4) 0.20M

AThe artificial sweetener, which is a derivative of sucrose, is:

1) stevia

2) saccharin

3) aspartame

4) sucralose

The compressibility factor of gas is more than unity at STP. Its value of Vm is

1) Equal to 22.4 dm³
2) Dependent on its molecular size
3) Greater than 22.4 dm³
4) lesser than 22.4dm³

50 mL of sample of hard water gave good lather with 6mL of standard soap solution (1 mL soap solutions = 1 mg CaCO_3?). If the hardness is only due to Mg(HCO₃?)₂?, the weight of milk of lime required to remove the hardness completely from 100 kg of that sample of water is:

1) 17.8 g
2) 8.9 g
3) 178 g
4) 89 g

A neutron has approximately the same mass as a

a alpha particle
a beta particle
an electron
a proton

5 ml of 1N HCl, 20 ml of $$\dfrac{N}{2}$$ $$H_2SO_4$$ and $$30$$ ml of $$\dfrac{N}{3}$$ $$HNO_3$$ are mixed together and the volume is made to $$1$$ L. The normality of the resulting solution is :

1) $$\dfrac{N}{5}$$
2) $$\dfrac{N}{10}$$
3) $$\dfrac{N}{20}$$
4) $$\dfrac{N}{40}$$

Which bond angle around X would result in the maximum dipole moment for the triatomic molecule XY₂?

1)  q = 120^o

2)  q = 150^o

3)  q = 90^o

4)  q = 180^o

A bottle of cold drink contains 200 ml liquid in which CO₂ is 0.1 molar. Suppose CO₂ behaves like an ideal gas, the volume of the dissolved CO₂ at STP is

1) 0.224 litre
2) 0.448 litre
3) 22.4 litre
4) 2.24 litre

Sodium metal cannot be stored in

1)  toluene

2)  alcohol

3)  kerosene

4)  benzene

A gaseous mixture enclosed in a vessel of volume V consists of one mole of gas A with γ(=C_P/C_V)=5/3 and another gas B with γ = 7/5

at a certain temperature T. The relative molar masses of the gas A and B are 4 and 32 , respectively. The gases A and B do not react with each other and are assumed to be ideal. The gaseous mixture follows the equation PV^19/13=  constant, in adiabatic processes. Compute the speed of sound in the gaseous mixture at T=300 K.

1) v = 501m/s
2) v = 401m/s
3) v = 701m/s
4) v = 801m/s