chemistry MCQs – Page 16

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 Review each marked answer and report any item that may be outdated or unclear.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
301. In a period electronegativity from left to right_________________?
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A. Decreases

B. Variable trend

C. Increases

D. Remain constant

302. Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is___________________?
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A. Analytical chemistry

B. Physical chemistry

C. Quantum chemistry

D. Stoichio chemistry

303. The relative attraction of the nucleus for the electrons in a chemical bond is called _________________?
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A. Ionization energy

B. None of the above

C. Electro negativity

D. Electron affinity

304. Ionic bond is produced after complete transfer of ________________ ?
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A. Nucleus

B. Protons

C. Neutrons

D. Electrons
305. The non-ideal behaviour results chiefly from________________?
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A. Intermolecular attraction and infinite volume

B. Intermolecular attractions and finite volume

C. Intermolecular attraction only

D. Elastic collisions and finite volume

306. The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is_____________________?
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A. Latent heat of that liquid

B. Molar heat of fusion

C. Molar heat of sublimation

D. Molar heat of vapourization
307. In a group ionic radius ?
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A. Decreases

B. No change

C. Increases

D. Variable trend

308. The ionization energy__________________?
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A. Does not change in a period

B. Generally increases from left to right in a period

C. Does not change in a group

D. Increase from top to bottom in a group

309. Safe and the most reliable method of drying crystals is through_________________?
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A. Filter paper

B. None of these

C. Vacuum desiccators

D. Oven

310. Ratio of the amount of solute in organic and aqueous solvent is________________?
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A. Distribution in aqueous solution

B. All statements are wrong

C. Retardation factor

D. Distribution co-efficient
311. At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?
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A. Same

B. Double

C. None

D. Half

312. Greater shielding effect corresponds to ionization energy value___________________?
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A. Greater

B. Remain same

C. No effect

D. Lesser
313. Geometry of simple molecule having sp3 hybrid orbital is ___________________?
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A. Triangular

B. Linear

C. Tetrahedral

D. Square planner

314. The kinetic molecular theory of gases was put forward in 1738 by _____________________?
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A. Boltzman

B. Maxell

C. Bernoulli

D. Clausius

315. Animal charcoal adsorbs the coloured_________________?
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A. impurities

B. crystals

C. solvents

D. both A & B

316. A process controlled by Distributive law is__________________?
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A. Crystallization

B. Filtration

C. Sublimation

D. Solvent extraction
317. Which of the following is the best explanation that CO2 is non polar molecule __________________?
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A. Sp hybridization

B. Linear geometry

C. Dipole moment is zero

D. None

318. Different components of a mixture have different Rf values due to________________?
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A. Distributive law

B. Polar solvent used

C. Their different distribution coefficients in the solvent

D. Combination of solvents used

319. Identification of the components of a sample is_________________?
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A. Qualitative analysis

B. Physical chemistry

C. Quantitative analysis

D. Stoichiometry

320. Water has maximum density at __________________?
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A. 100C

B. 4C

C. 2C

D. 0C