GPAT PYQs – Set 13

Year: 2023

241. Alkyl group in Grignard reagent serve as

Organic Chemistry • General Organic Chemistry

A. Carbene B. Free radical C. Aromatic carbocation D. Carbanion

242. The potential of the calomel electrode depends upon

Physical and Inorganic Chemistry • Physical and Inorganic Chemistry

A. The concentration of potassium chloride solution B. Concentration of mercuric chloride C. Concentration of mercury D. Membrane

243. The addition of Monobasic Potassium Phosphate to the suspended Bismuth Subnitrate particles cause the A to B owing to the C.

Physical Pharmacy • States of Matter + Micromeritics + Surface and Interfacial Tension

A. A-negative zeta potential, B-decrease, C-adsorption of the negatively charged phosphate anion B. A-positive zeta potential, B-increase, C-adsorption of the negatively charged phosphate anion C. A-positive zeta potential, B-decrease, C-adsorption of the negatively charged phosphate anion D. A-positive zeta potential, B-decrease, C-adsorption of the positively charged hydrogen anion

244. The ethanolic solution contaminated with benzene showed an absorbance of 0.69 at 260 nm in a 2 cm cell; if the molar absorptivity of benzene in ethanol is 230 M⁻¹cm⁻¹, what is the concentration of benzene in the solution?

Pharmaceutical Analysis • Spectroscopy

A. 0.003 M B. 0.0015 M C. 0.001 M D. 0.015 M

245. Conversion of cyclic ketone to ring expended cyclic ester takes place by

Organic Chemistry • Name Reactions

A. willgerodt rearrangement B. Michael rearrangement C. lossen rearrangement D. Baeyer villager rearrangement

246. Which of the following is not a sulphonamide derivative?

Pharmacology • Antimicrobial Agents

A. Almotriptan B. Sumatriptan C. Rizatriptan D. Naratriptan

247. When exposed to carbon monoxide, the base pigment of cytochrome P enzymes absorbs light at

Pharmacology • General Pharmacology

A. 450 nm B. 370 nm C. 254 nm D. 600 nm

248. Carbohydrates have hydrogen oxygen atom ratio of

Biochemistry • Carbohydrate Metabolism

A. Sat Dec 30 1899 14:23:10 GMT+0521 (India Standard Time) B. Sat Dec 30 1899 16:22:10 GMT+0521 (India Standard Time) C. Sat Dec 30 1899 14:24:10 GMT+0521 (India Standard Time) D. Sat Dec 30 1899 15:22:10 GMT+0521 (India Standard Time)

249. Identify A, B and C in below reaction

Organic Chemistry • Name Reactions

A. A = Br2, B = KOH, C = NANH2 B. A = Br2, B = HCl, C = NaNH2 C. A = Br2, B = HCl, C = NaBH4 D. A = Br2, B = KOH, C = NABH4

250. Identify intermediate forms in following substitution reaction

Organic Chemistry • Name Reactions

A. Cyclohexa-1,3-dien-4-yne B. Cyclohexa-1,3-dien-5-yne C. Cyclohexa-1,4-dien-5-yne D. Cyclohexa-1.5-dien-3-yne

251. Match List I with List II: A. Zolpidem, B. Zaleplon, C. Zopiclone, D : Triazolam; I. Cyclopyrrolone, II. Benzodiazepine, III. Imidazopyridine, IV. Pyrazolopyrimidine

Pharmacology • Drugs Acting on Central Nervous System

A. (A)-(IV); (B)-(III); (C)-(II); (D)-(I) B. (A)-(II); (B)-(IV); (C)-(III); (D)-(I) C. (A)-(III); (B)-(IV); (C)-(I); (D)-(II) D. (A)-(I); (B)-(III); (C)-(IV); (D)-(II)

252. Addition of HBr to 1,3-butadiene at 40°C yields

Organic Chemistry • Name Reactions

A. 80% 1,4-addition product and 20% 1,2-addition product B. 80% 1,2-addition product and 20% 1,4-addition product C. 80% 1,2-addition product and 20% 1,3-addition product D. 80% 1,2-addition product and 20% 1,3-addition product

253. The starting raw material for synthesis of lignocaine is:

Medicinal Chemistry • Name Reactions

A. 4-Chlorobenzyl cyanide B. 2,6-Xylidine C. p-Nitroacetophenone D. 4-Amino-3-Nitroanisole

254. Which factor makes the carbonyl group in acyl compounds especially susceptible to nucleophilic attack?

Organic Chemistry • General Organic Chemistry

A. Oxygen’s tendency to acquire electrons at the expense of gaining positive charge B. Oxygen’s tendency to acquire electrons at the expense of gaining negative charge C. Carbon’s tendency to lose electrons at the expense of gaining negative charge D. Carbon’s tendency to lose electrons at the expense of gaining positive charge

255. Carabilide shows strong IR absorption in which of the following range (cm⁻¹)?

Pharmaceutical Analysis • Spectroscopy

A. 3200–3600 B. 1640–1690 C. 1000–1300 D. 2210–2260

256. Phenol reacts with chloroform in the presence of aqueous sodium hydroxide to yield the chief product

Organic Chemistry • Name Reactions

A. 2-Chloro Benzaldehyde B. 2-Hydroxy Benzaldehyde C. 3-Hydroxy Benzaldehyde D. 3-Chloro Benzaldehyde

257. Replacement of the diazonium group by halogen in the presence of copper powder is known as

Organic Chemistry • Name Reactions

A. Sandmeyer reaction B. Gattermann reaction C. Hofmann reaction D. Gabriel reaction

258. Which ICH guideline provides the general requirements for stability testing of new drug substances and products?

Pharmaceutical Jurisprudence • Drugs and Cosmetics Act, 1940

A. Q1A (R2) B. Q1B C. Q1D D. Q1E

259. In polarography, which current must be blocked?

Pharmaceutical Analysis • Spectroscopy

A. Residual B. Migration C. Diffusion D. None

260. Identify the pair of C4 epimers

Biochemistry • Carbohydrate Metabolism

A. D-glucose and D-galactose B. D-glucose and D-fructose C. D-glucose and D-mannose D. D-glucose and D-xylulose

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GPAT PYQs – Set 13

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