PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

Complete the following reaction:

\[\ce{C6H5N2Cl + H3PO2 + H2O ->}\]

Arrange the following compound in increasing order of its reactivity in nucleophilic addition reactions.

Ethanal, Propanal, Propanone, Butanone.

Hint: Consider steric effect and electronic effect.

Arrange the following compound in increasing order of its reactivity in nucleophilic addition reactions.

Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Hint: Consider steric effect and electronic effect.

Predict the product of the following reaction:

Predict the product of the following reaction:

Predict the product of the following reaction:

\[\begin{array}{cc}
\phantom{..............}\ce{O}\\
\phantom{..............}||\\
\ce{R - CH = CH - CHO + NH2 - C - NH - NH2 ->[H+]}\end{array}\]

What is meant by the following term? Give an example of the reaction in the following case.

Cyanohydrin

What is meant by the following term? Give an example of the reaction in the following case.

Acetal

What is meant by the following term? Give an example of the reaction in the following case.

Semicarbazone

What is meant by the following term? Give an example of the reaction in the following case.

Hemiacetal

What is meant by the following term? Give an example of the reaction in the following case.

Oxime

What is meant by the following term? Give an example of the reaction in the following case.

Ketal

What is meant by the following term? Give an example of the reaction in the following case.

Imine

What is meant by the following term? Give an example of the reaction in the following case.

2, 4-DNP-derivative

What is meant by the following term? Give an example of the reaction in the following case.

Schiff’s base

Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.

PhMgBr and then H₃O⁺

Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.

Semicarbazide and weak acid

Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.

Excess ethanol and acid

Acetaldehyde, Acetone, Di-tert-butyl ketone, Methyl tert-butyl ketone (reactivity towards HCN)

How will you bring about the following conversion in not more than two steps?

Bromobenzene to 1-Phenylethanol