A 0.2M solution of formic acid is 3% ionised. The value of ionization constant is

1) 1.8
2) 1.8 × 10^-4
3) 0.018
4) 18

Select the correct order with respect to the basic character of the transition metal monoxides. 

(Atomic number in amu of Ti=22, V=23, Cr=24, Fe=26)

1) VO>CrO>TiO>FeO
2) CrO>VO>FeO>TiO
3) TiO>VO>CrO>FeO
4) TiO>FeO>VO>CrO

Which of the following is fully fluorinated polymer?  

1)  PVC
2)  Thiokol
3)  Teflon
4) Neoprene

What is the oxidation number of H and Cl in HClO₄ respectively?

1) +1,+7
2) +2,+6
3) +3,+7
4) +2,+7

The bond energies of C−C, C=C, H−H and C−H linkages are 350, 600, 400 and 410 kJ/mol respectively. The heat of hydrogenation of ethylene is:

1) −170 kJ/mol
2) −400 kJ/mol
3) −260 kJ/mol
4) −460 kJ/mol

Acetone is soluable in water due to 

1. methyl group 
2. neutral nature 
3. dissociation in water 
4. hydrogen bonding 

The rate constant of a zero order reaction is 0.2 mol dm⁻³h⁻¹. If the concentration of the reactant after 30 minutes is 0.5 mol dm⁻³. Then its initial concentration would be :-

1) 0.60 mol dm⁻³
2) 0.15 mol dm⁻³
3) 0.25 mol dm⁻³
4) 4.00 mol dm⁻³

A transition element X has a configuration $$[Ar]3d^4$$, in its +3 oxidation state. Its atomic number is:

1) 25
2) 26
3) 22
4) 19

What volume of decinormal K₂Cr₂O₇ solution would be needed to convert 1.19 g of tin to stannic chloride in an acidic medium? (ASn = 119ASn = 119)

1) 400 ml
2) 200 ml
3) 100 ml
4) 2800 ml

In nucleophilic addition reactions the reactivity of carbonyl compound follows order

1) H₂C=O >R₂C=O > Ar₂C = O > RCHO > ArCHO
2) H₂C=O > RCHO > ArCHO > Ar₂C = O
3) Ar₂C = O > R₂C=O > ArCHO > H₂C=O
4) ArCHO > Ar₂C = O > RCHO > R₂C=O > H₂C=O