List of practice Questions

A gas is found to have the formula (CO)$^n$. If its vapour density is 56, the value of n will be

A mixture of acetone (b.p. 56$^\circ$) and methanol (b.p. 65$^\circ$) can be separated by

A mixture of benzoic acid and naphthalene can be separated by crystallization from

A mixture of two immiscible liquids may be easily separated by using a

An example of alicyclic compound is

An organic compound contains $69\%$ carbon and $4.8\%$ hydrogen, the remainder being oxygen. What will be the masses of carbon dioxide and water produced when $0.20 \,g$ of this substance is subjected to complete combustion.

Aniline is insoluble in water and processes low vapour pressure. It can be purified by

Aniline is usually purified by

Arrange the following alkyl bromides in decreasing order of rates of $S_N2$ displacement reaction.

In the case of polyfunctional compounds, the choice of principal functional group is made on the basis of order of preference. The order of decreasing priority for some functional groups is

Nitroalkanes and alkyl nitrites exhibit functional isomerism. Compounds having same molecular formula but different functional groups are called functional isomers.

Paper chromatography is a type of partition chromatography. Moving phase is liquid and stationary phase is solid.

When inductive and electromeric effects operate in opposite directions, the inductive effect predominates. Inductive effect is the complete transfer of shared pair of $\pi$ electrons to one of the atoms.

Bond length of ethane (I), ethene (II), acetylene (III) and benzene (IV) follows the order

Carbanion is iso-structural with

Dehydration of ethyl alcohol proceeds via

Distillation under reduced pressure is employed for

Electronegativity of carbon atoms depends upon their state of hybridisation. In which of the following compounds, the carbon marked with asterisk is most electronegative?

Electrophilic reagents are

Heterolysis of carbon-chlorine bond produces

Heterolytic fission of a covalent bond in organic molecules gives

Hyperconjugation effect is also called

In Carius method of estimation of halogen, $0.15\, g$ of an organic compound gave $0.12\, g$ of $AgBr$. What is the percentage of bromine in the compound?

In column chromatography the moving phase is constituted of

In Kjeldahl?? method of estimation of nitrogen, nitrogen is quantitatively converted to ammonium sulphate. It is then treated with standard solution of alkali. The nitrogen which is present is estimated as