chemistry MCQs – Page 19

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
361. During which process empty spaces between particles become minimum ?
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A. condensation

B. evaporation

C. ionization

D. fusion

362. 95% ethanol is called_________________?
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A. methylated spirit

B. rectified spirit

C. wood spirit

D. absolute alcohol

363. Positive rays give flash on________________?
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A. ZnS

B. AgNO3 plate

C. ZnO

D. AgCl plate

364. The property of carbon chain formation is called _________________?
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A. hybridization

B. catenation

C. polymerization

D. solvation

365. Hydrogen bonding is involved in____________________?
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A. Biological molecules

B. All

C. Cleansing action of detergents

D. Solubility

366. Pfund series are produced in the spectrum of hydrogen atom__________________?
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A. when electrons jump down to 3rd- orbit

B. when electrons jump down to 5th- orbit

C. when electrons jump down to 2nd- orbit

D. when electrons jump down to 4th- orbit

367. Which is not heterocyclic compound _______________?
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A. Thiophene

B. Pyridine

C. Furan

D. Aniline
368. The conversion of vapours back into their liquid state is called__________________?
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A. condensation

B. vaporization

C. crystallization

D. evaporization

369. Shielding effect across the period ________________?
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A. Decreases

B. Constant

C. Increases

D. None

370. Which is not related pair of term used in analytical techniques________________?
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A. Filtrate residue

B. Sublimate sublimation

C. Separating funnel mother liquor

D. Drying desiccator

371. Under what conditions the gases deviate from the ideal behavior ?
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A. B and C

B. High temperature

C. Low temperature

D. High pressure

372. The viscosity of solids is________________?
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A. No concept of viscosity in solid

B. Medium

C. Infinite

D. Negligible

373. For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature ?
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A. 2/3dm3

B. 1/2dm3

C. 1/3dm3

D. 1/4dm3

374. A solid may be made up of_________________?
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A. Atoms

B. A, B, and C

C. Ions

D. Molecules

375. Unpaired electron in a molecule gives ______________ character ?
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A. Ferromagnetic

B. Paramagnetic

C. Diamagnetism

D. Both A & B

376. All of the following were theorized by Bohr in his description of the atom except__________________?
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A. Angular momentum of electrons in multiples of h/2?

B. Electrons radiate energy continuously in a given orbit.

C. Electrons revolve in discrete circular orbits

D. Energy of each electron is directly proportional to n2

377. Separation of a solid from its hot saturated solution by cooling is called__________________?
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A. crystallization

B. vapourization

C. filtration

D. solvent extraction

378. State function the macroscopic property of system depends upon________________?
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A. initial state

B. initial and final state

C. path of reaction

D. final state

379. If 1/V is plotted on X-axis and pressure on Y-axis at constant temperature what should appear ________________?
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A. Straight line

B. Straight line parallel to y-axis

C. Straight line parallel to x-axis

D. Curve

380. The major steps involved in complete quantitative analysis are _________________?
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A. 4

B. 3

C. 2

D. 5