Which one of the following is an essential amino acid?

• Tyrosine

• Cysteine

• Isoleucine

• Serine

In the sequence of following reactions

The starting compound P is

• o- nitro toluene

• m-nitro toluene

• o-bromo toluene

• p-nitro toluene

Acetic acid is treated with Ca(OH)₂ and the product so obtained is subjected to dry distillation. The final product is

• propanal

• propanone

• ethanal

• ethanol

Cheilosis and digestive disorder are due to the deficiency of

• thiamine

• ascorbic acid

• riboflavin

• pyridoxine

One of the following amide will not undergo Hofmann bromamide reaction

• CH₃CONH₂

• CH₃CONHCH₃

• C₆H₅CONH₂

• CH₃CH₂CONH₂

100 cm² of 1 M CH₃COOH was mixed with 100 cm³ of 2M CH₃OH to form an ester. The change in the initial rate if each solution is diluted with equal volume of water would be

• 2 times

• 4 times

• 0.5 times

• 0.25 times

57.

Iodoform can be prepared from all, except

• propan-2-ol

• butan-2-one

• propan-1-ol

• acetophenone

Identify Q in the following sequence of reaction

Which of the following is not true?

• Erythromycin is a bacteriostatic antibiotic

• Ampicillin is not a natural antibiotic

• Prontosil is not converted into sulphanilamide in the body

• Vancomycin is a broad spectrum antibiotic

Arrange the following compounds in the increasing order of their acidic strength.

I. m-nitrophenol

II. m-cresol

III. Phenol

IV. m-chlorophenol

• III < II < I < IV

• II < IV < III < I

• II < III < IV < I

• II < III < I < IV