Given: R = 8.314 JK^-1 mol^-1, the work done during combustion of 0.090 kg of ethane (molar mass = 30) at 300 K is

• -18.7 kJ

• 18.7 kJ

• 6.234 kJ

• -6.234 kJ

What is the possible number of monohydroxy derivatives of a hydrocarbon consisting of five carbon atoms with one methyl group as a branch?

• 2

• 3

• 4

• 5

Chlorination of ethane is carried out in the presence of

• anhydrous AlBr₃

• mercuric chloride

• ultraviolet light

• zinc chloride

The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal in the presence of dry ether is

• butane

• octane

• hexane

• ethane

The total number of monohalogenated products formed by halogenation of 2, 4, 4-trimethylhexane are,

• 5

• 7

• 6

• 8

If 27 g of water is formed during complete combustion of pure propene (C₃H₆), the mass of propene burnt is

• 42 gm

• 21 gm

• 14 gm

• 56 gm

57.

When methane is heated with dioxygen in the presence of Mo₂O₃ catalyst, the organic product obtained is

• methanal

• ethanoic acid

• methanol

• ethanol

The products obtained by the ozonolysis of 2-ethylbut-1-ene are

• propanone and ethanal

• methanal and 3-pentanone

• ethanal and 3-pentanone

• butanal and ethanal

When n-hexane is heated with anhydrous AlCl₃ and HCl gas, the major product obtained is

• 1-chlorohexane

• 2-chlorohexane

• 3-chlorohexane

• mixture of 2-methylpentane and 3-methylpentane

The decreasing order of acidic character among ethane (I), ethene (II), ethyne (III) and propyne (IV) is

• (I) > (II) > (III) > (IV)

• (II) > (III) > (I) > (IV)

• (III) > (IV) > (II) > (I)

• (IV) > (III) > (II) > (I)