How many isomeric butanes are there?

• 2

• 3

• 4

• 5

Which of the following will show geometrical isomerism?

• 1-butene

• 2-butene

• 2-methyl propene

• Propene

Calcium carbide reacts with water to produce

• methane

• ethane

• ethylene

• acetylene

Aromatic properties of benzene are proved by

• aromatic sextet theory

• resonance theory

• molecular orbital theory

• All of the above

Marsh gas primarily contains

• C₂H₂

• CH₄

• H₂S

• CO

n-propyl alcohol and iso-propyl alcohol are examples of

• position isomerism

• chain isomerism

• tautomerism

• geometrical isomerism

Optical isomerism is shown by

• butanol-1

• butanol-2

• butene-1

• butene-2

Heating together of sodium ethoxide and ethyl iodide wll give

• ether

• ethyl alcohol

• acetaldehyde

• acetic acid

Benzene hexachloride is used as

• dye

• antimalarial drug

• antibiotic

• insecticide

50.

One mole of a solute A is dissolved in a given volume of a solvent. The association of the solute takes place according to nA $\rightleftharpoons$ [A]_n. The van't Hoff factor (i) is expressed as:

• i = 1 - x

• i = 1 + $\frac{\mathrm{x}}{\mathrm{n}}$

• i = $\frac{1 - \mathrm{x} + {\displaystyle \frac{\mathrm{x}}{\mathrm{n}}}}{1}$

• i = 1