Pharmaceutical Analysis PYQs – Set 70

By Atul Sahu • Pharmaceutical Analysis, Subject Wise PYQs

Pharmaceutical Analysis PYQs – Set 70

Subject : Pharmaceutical Analysis

1381. Compact size, low weight mass instrument is

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. EI-TOF B. MALDI-Quadrapok C. MALDI-TOF D. Ion-Trap

1382. The carbonyl stretching frequency for esters is approximately how many cm⁻¹ compared to simple aldehydes/ketones (≈1710 cm⁻¹)?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. 1650 B. 1700 C. 1750 D. 1850

1383. Plastographic method of analysis to obtain individual amounts of Cu²⁺ and Cd²⁺ in a mixture is achieved by measuring their

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Half-wave potentials B. Migration currents C. Decomposition potentials D. Diffusion currents

1384. In polarography, which current must be blocked?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

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

1385. The correct order for the basic features of a mass spectrometer is

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Acceleration, deflection, detection, ionization B. Ionization, acceleration, deflection, detection C. Acceleration, ionization, deflection, detection D. Acceleration, deflection, ionization, detection

1386. 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 • GPAT 2015

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

1387. Carabilide shows strong IR absorption in which of the following range (cm⁻¹)?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

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

1388. In polarography, which current must be blocked?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

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

1389. Which of the following compounds absorbs at the longest wavelength

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. 1,3,5‑Hexatriene B. 1,3,5,7‑Octatetraene C. 1,7‑Diphenyl‑1,3,5‑heptatriene D. 1,6‑Diphenyl‑1,3,5‑heptatriene

1390. The Michaelis‑Menten hypothesis

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Postulates the formation of an enzyme‑substrate complex B. Enables calculation of an enzyme’s isoelectric point C. States that the reaction rate may be independent of substrate concentration D. States that the reaction rate is proportional to substrate concentration

1391. Hixon Crowell’s cube root law of dissolution states that

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. There is a change in particle size and surface area during dissolution B. The dissolution process is controlled by diffusion of molecules/ions C. High free energy of activation is required for dissolution D. Renewal of the surface fluid layer around the drug particle

1392. Which of the following rules about spin‑spin coupling and bond multiplicities in NMR spectra is correct

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Coupling constant rarely exceeds 20 cps while chemical shifts are over 1000 cps B. Spin‑spin interactions depend on the strength of the applied field C. Coupling constants increase with distance D. Equivalent nuclei do not interact to show coupling

1393. Which among the following statements regarding ceric sulphate as an oxidizing titrant is correct?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Ce(IV) exists as an anionic complex in sulphuric acid media B. Ionic equation is Ce(IV) → Ce(III) + e⁻ C. Formal potential of the Ce(III)/Ce(IV) couple is 1 D. Ce(IV) does not permit the use of HCl as reducing media

1394. Chemical interferences are more common than spectral interferences due to

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Formation of compounds of low volatility B. Ionization in flames C. Increase in rate of atomization D. No shift in ionization equilibrium

1395. All of the following enzymes are used in ELISA except:-

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Glucose oxidase B. Alkaline phosphatase C. Coagulase D. β‑galactosidase

1396. Which of the following equilibrium suggests noncompetitive inhibition of enzyme E for conversion of substrate S to product P with inhibitor I?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Km remains unchanged and Vmax decreases B. Km increases and Vmax decreases C. Km decreases and Vmax remains constant D. Both Km and Vmax decrease

1397. What software programme is used to determine the Verloop steric parameter in QSAR?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. Alchemy B. Chem3D C. Sterimol D. Chem‑Draw

1398. The unit for specific absorbance A (1%, 1 cm) is:-

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. μg/mL B. mg/L C. liter·mol⁻¹·cm⁻¹ D. dl·g⁻¹·cm⁻¹

1399. What is the nuclear magnetic resonance frequency of ¹H in a 7.05 Tesla magnetic field strength?

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. 300.0 MHz B. 200.0 MHz C. 60.0 MHz D. 100 MHz

1400. In NMR, the aromatic protons resonate in a characteristic narrow range at:-

Pharmaceutical Analysis • Spectroscopy • GPAT 2015

A. δ 6.5–δ 8.0 B. δ 11.0–δ 12.0 C. δ 2.0–δ 4.0 D. δ 0.7–δ 1.3

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Pharmaceutical Analysis PYQs – Set 70

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