E-PolyLearning

11. Ethanol has boiling point of
a. 38 degree Celsius
b. 65 degree Celsius
c. 67 degree Celsius
d. 78.25 degree Celsius
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Answer: (d).78.25 degree Celsius

12. In London dispersion forces dipole which is created, is
a. temporary
b. permanent
c. weak
d. strong
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Answer: (a).temporary

13. Bond distance in iodine molecule in solid iodine is
a. 271.5pm
b. 266.6pm
c. 250pm
d. 230pm
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Answer: (a).271.5pm

14. Sulphur dioxide has molar heat of vaporization whose value in kJ/mole is
a. 40.6kJ/mole
b. 15.6kJ/mole
c. 24.3kJ/mole
d. 21kJ/mole
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Answer: (c).24.3kJ/mole

15. Energy which is released when 1 mole of ionic crystal is formed is known as
a. lattice energy
b. heat energy
c. molar energy
d. kinetic energy
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Answer: (a).lattice energy

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