HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

Answer in one sentence.

Predict the product of the following reaction.

\[\ce{Nitrobenzene ->[Sn/conc.HCl]?}\]

Answer the following

Identify A and B in the following reactions.

\[\ce{C6H5CH2Br->[alco.][KCN]A ->[Na/ethanol]B.}\]

Select the most correct choice.

A disulphide link gives rise to the following structure of a protein.

Give scientific reasons:

α-Amino acids have high melting points compared to the corresponding amines or carboxylic acids of comparable molecular mass.

Answer the following

Write a reaction to convert acetic acid into methylamine.

Give scientific reasons:

On boiling egg albumin becomes opaque white.

Write the names and schematic representations of all the possible dipeptides formed from alanine, glycine and tyrosine.

Draw a neat diagram for the following:

Zwitter ion

Answer the following

Explain Gabriel phthalimide synthesis.

Draw a neat diagram for the following:

Secondary structure of protein

Draw a neat diagram for the following:

Enzyme catalysis

Answer the following

Explain the ammonolysis of alkyl halides.

Choose the correct option from the given alternatives.

Which of the following is made up of polyamides?

Answer the following in one sentence.

Identify 'A' in the following reaction:

Answer the following in one sentence.

Identify 'B' in the following reaction:

\[\ce{H2N -(CH2)6 - NH2 + HOOC - (CH2)4 - COOH ->[N2][533 K]}\]'B'

What are amines?

Write reactions to prepare ethanamine from Acetonitrile.

Answer the following in one sentence.

Define the term: Vulcanization

Answer the following in one sentence.

What type of intermolecular force leads to high-density polymer?

Answer the following in one sentence.

Identify thermoplastic and thermosetting plastic from the following:

1. PET
2. Urea formaldehyde resin
3. Polythene
4. Phenol formaldehyde resin