Chemistry MCQs

Page No. 99

Liquid crystal is discovered by __________________?


aWilliam Crooks

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bFredrack Reinitzer

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cJ.J Thomson

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dBravis

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View Answer Fredrack Reinitzer

Vapour pressure of water at 100°C is___________________?


a55 mm Hg

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b760 mm Hg

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c355 mm Hg

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d1489 mm Hg

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View Answer 760 mm Hg

In order to mention the boiling point of water at 110°C the external pressure should be ?


aBetween 760 torr and 1200 torr

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bBetween 200 torr and 760 torr

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c765 torr

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dany value of pressure

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When substance moves from a solid to a liquid state all of the following changes occur except__________________?


aMolecules become more disordered

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bK.E of the molecules decreases

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cIntermolecular forces become weaker

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dMolecule become further separated

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Which of the following has strongest intermolecular forces of attraction ?


aHydrogen (H2)

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bChlorine(Cl2)

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cIodine(I2)

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dMethane(CH4)

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View Answer Iodine(I2)

________________ is study about energy of a chemical system ?


athermochemistry

✓


bthermodynamics

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cchemical kinetics

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dstoichiometry

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View Answer thermochemistry

Unit of heat in SI system is________________?


aJ

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bKCal

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cCal

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dGJ

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View Answer J

Total energy of a system is_________________?


aP.E + K.E

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bP.E + heat energy

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cK.E + heat energy

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dP.E + mechanical energy

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View Answer P.E + K.E

CuSO4 + Zn?ZnSO4+Cu is___________________?


aSpontaneous reaction

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bNon-spontaneous reaction

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cEndothermic

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dExothermic

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View Answer Spontaneous reaction

State function the macroscopic property of system depends upon________________?


apath of reaction

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binitial state

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cfinal state

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dinitial and final state

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