Chemistry MCQs

Page No. 99

Liquid crystal is discovered by __________________?


aWilliam Crooks


bFredrack Reinitzer


cJ.J Thomson


dBravis


View Answer Fredrack Reinitzer

Vapour pressure of water at 100°C is___________________?


a55 mm Hg


b760 mm Hg


c355 mm Hg


d1489 mm Hg


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


bBetween 200 torr and 760 torr


c765 torr


dany value of pressure



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


aMolecules become more disordered


bK.E of the molecules decreases


cIntermolecular forces become weaker


dMolecule become further separated



Which of the following has strongest intermolecular forces of attraction ?


aHydrogen (H2)


bChlorine(Cl2)


cIodine(I2)


dMethane(CH4)


View Answer Iodine(I2)

________________ is study about energy of a chemical system ?


athermochemistry


bthermodynamics


cchemical kinetics


dstoichiometry


View Answer thermochemistry

Unit of heat in SI system is________________?


aJ


bKCal


cCal


dGJ


View Answer J

Total energy of a system is_________________?


aP.E + K.E


bP.E + heat energy


cK.E + heat energy


dP.E + mechanical energy


View Answer P.E + K.E

CuSO4 + Zn?ZnSO4+Cu is___________________?


aSpontaneous reaction


bNon-spontaneous reaction


cEndothermic


dExothermic


View Answer Spontaneous reaction

State function the macroscopic property of system depends upon________________?


apath of reaction


binitial state


cfinal state


dinitial and final state



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