600 m of a mixture of O₃ and O₂ weight 1 g at NTP. Calculate the volume of ozone in the mixture.

1) 400 ml
2) 600 ml
3) 200 ml
4) 100 ml

On the basis of information available from the reaction
(4/3)Al + O₂ → (2/3)Al₂O₃, ΔG = -827 kJmol^-1
of O₂ the minimum emf required to carry out an electrolysis of Al₂O₃ is [ F=96500 C mol-1]

1) 2.14 V
2) 4.28 V
3) 6.42 V
4) 8.56 V

$$NO_2$$ required for a reaction is produced by the decomposition of $$N_2O_5$$ in $$CCl_4$$ as per the equation
$$2N_2O_5(g) \rightarrow 4NO_2(g)+O_2(g)$$.
The initial concentration of $$N_2O_5$$ is $$3.00\, mol\, L^{-1}$$ and it is $$2.75\, mol\, L^{-1}$$ after $$30$$ minute. The rate of formation of $$NO_2$$ is :
1) $$2.083\times 10^{-3}\, mol\, L^{-1} min\, ^{-1}$$
2) $$4.167\times 10^{-3}\, mol\, L^{-1} min\, ^{-1}$$
3) $$8.333\times 10^{-3}\, mol\, L^{-1} min\, ^{-1}$$
4) $$1.667\times 10^{-2}\, mol\, L^{-1} min\, ^{-1}$$

Thermal decomposition method is used to purify

1)  Ti

2)  Ni

3)  Zr

4)  Cr

Which of the following is not an antidepressants?

1) Iproniazid
2) Phenelzine
3) Salvarsan
4) Nardil

Two glucose solutions are mixed. One has a volume of 480 mL and a concentration of 1.50 M and the second has a volume of 520 mL and concentration 1.20 M. The molarity of final solution is :

1) 1.20 M
2) 1.50 M
3) 1.344 M
4) 2.70 M

Which of the following fertilizers does not replenish nitrogen in the soil? :

1) CAN
2) Urea
3) Super phosphate lime.
4) Ammonium phosphate

In order to prepare one litre 1N solution of KMnO4?, how many grams of KMnO4? are required, if the solution to be used in acid medium for oxidation?

1) 128 g 

2) 41.75 g

3) 31.60 g 

4) 62.34 g 

Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt. = 78.4) then minimum molecular weight of peroxidase anhydrous enzyme is
1) 1.568 × 10⁴
2) 1.568 × 10³
3) 15.68
4) 2.136 × 10⁴

Within a specified period, an increase in atomic number is usually accompanied by:

1. an increase in atomic radius and an increase in electronegativity.
2. a decrease in atomic radius and an increase in electronegativity.
3. an increase in atomic radius and a decrease in electronegativity.
4. a decrease in atomic radius and a decrease in electronegativity.