An open vessel containing air at 27^oC is heated to 127^oC. The fraction of air originally present in the bottle that is expelled is:

1) 50%
2) 25%
3) 40%
4) 33%

Only an aldehyde having ____can undergo the aldol condensation.
 1) at least one alpha H atom.
 2) at least one beta H atom.
 3) no alpha H atom.
 4) an aromatic ring

3.92 g of ferrous ammonium sulphate crystals are dissolved in 100ml of water. 20ml of this solution requires 18ml of potassium permanganate during titration for complete oxidation. The weight of KMNO4 present in one litre of the solution of

1) 34.76g
2) 12.38g
3) 1.238g
4) 3.476g

In the b-particle emission, the daughter nuclide will be an _______ of the parent.

1) Isotone
2) Isotope or isobar
3) Isobar
4) Isotope

Oxidision power of chlorine in aqueous solution can be determined by the parameters indicated below.

 

1) + 152 kJ mol ^-1
2) - 610 kJ mol ^-1
3) - 850 kJ mol ^-1
4) + 120 kJ mol ^-1

The monomer of the polymer;

Which of the following are arranged in an increasing order of their bond strengths?

The three important oxidation state of P are:

1) −3,+3,+5
2) −3,+3,−5
3) −3,+4,+5 
4) −3,+3,+4

In the Reaction the product  C is

1) acetaldehyde
2) acetylene
3) ethylene
4) acetyl chloride

A first order reaction was started with a decimolar solution of the reactant. 8 minutes and 20 seconds later its concentration was found to be M/100. So the rate constant of the reaction is

1) 2.303 × 10^-5/sec
2) 5 × 10^-3 /sec
3) 2.303 × 10^-4/sec
4) 4.606 ×  10^-3/sec