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

In the manufacture of nitric acid by ostwald,s process, the catalyst used are

 1) finely divided iron
 2) Pt-Rn gauze
 3) vanadium pantoxide
 4) molybdenum

At equilibrium 500ml500ml vessel contains 1.5M of each A,B,C,D if 0.5N if C and D expelled out than what would be the Kc ?

1) 1
2) 1/9
3) 4/9
4) 5/9

Which of the following will form when calcium acetate is distilled?

1)  Formaldehyde

2)  Ethanal

3)  Propanal

4)  Acetone

E0(Ni₂₊/Ni)=−0.25volt,  E0(Au³⁺/Au)=1.50volt . The standard emf of the voltaic cell. Ni(s)|Ni²⁺(aq)(1.0M)|| Au³⁺(aq)(1.0M)|Au(s)Ni(s)|Ni(aq)2+(1.0M)||Au(aq)³⁺(1.0M)|Au(s) is:

1) 1.25  volt
2) - 1.75 volt
3) 1.75 volt
4) 4.0 volt

The compound used as a preservative for food products such as tomato ketchup and fruit juices is

1) Sodium benzoate
2) Formic acid
3) Sodium Salicylate
4) Sodium acetate.

An alkyl bromide, RBr of molecular weight 151 is the exclusive product of bromination of which hydrocarbon?

1) Dodecane
2) 2,2 - dimethylpropane
3) 2,2 - dimethylhexane
4) 2,2,3 - trimethylheptane

For which of the following crystalline substances does the solubility in water increase upto 32^? and then decrease rapidly?

1) CaCl₂.2H₂O
2) Na₂SO₄.10H₂O
3) FeSO₄.7H₂O
4) Alums

The correct order of decreasing ionic radius among the following anions would be:

1) Se²⁻,I⁻,Br⁻,F⁻,O²⁻
2) F⁻.Br⁻,O²⁻,Se²⁻,I⁻
3) I⁻,Se²⁻,Br−,O²⁻,F⁻
4) F⁻,O²⁻,Br−,Se²⁻,I⁻

In which of the compounds does hydrogen have an oxidation state of - 1?

1)  CaH₂

2)  HCl

3)  NH₃

4)  CH₄