The reagents to carry out the following conversion are

• HgSO₄/dil H₂SO₄

• BH₃; H₂O₂/NaOH

• OsO₄; HIO₄

• NaNH₂ /CH₃I; HgSO₄/dil H₂SO_4.

The correct statement regarding the following compounds is

• all three compounds are chiral

• only I and II are chiral

• I and III are diastereomers

• only I and III are chiral

In the following reaction, the product  E is

The intermediate J in the following Wittig reaction is

55.

An amine C₃H₉N reacts with benzene sulphonyl chloride to form a white precipitate which is insoluble in aq. NaOH. The amine is

• 

• 

• 

• 

The number of amino acids and number of peptide bonds in a linear tetrapeptide (made of different amino acids) are respectively.

• 4 and 4

• 5 and 5

• 5 and 4

• 4 and 3

The reagent with which the following reaction is best accomplished is

• H₃PO₂

• H₃PO₃

• H₃PO₄

• NaHSO₃

In DNA, the consecutive deoxynucleotides are connected via

• phosphodiester linkage

• phosphomonoester linkage

• phosphotriester linkage

• amide linkage

The reaction of aniline with chloroform under alkaline conditions leads to the formation of

• phenylcyanide

• phenylisonitrile

• phenylcyanate

• phenylisocyanate

When phenol is treated with D₂SO₄ /D₂O, some of the hydrogens get exchanged.The final product in this exchange reaction is