11th class (FSc) chemistry Unit 4 MCQs
Chapter 4 MCQs 11th Class Chemistry
Liquids and Solids:
1. Force which are present between ions and water molecules are:
a. Ion-dipole forces
b. Dipole-induced dipole forces
c. London dispersion forces
d. Dipole- dipole forces
2. Dipole-dipole forces are present among:
a. Chloroform molecules
b. Molecules of iodine
c. CCl4
d. Atoms of neon is gaseous state
3. Dipole-induced dipole forces are also called:
a. Hydrogen bonding
b. London dispersion forces
c. Huckel forces
d. Debye forces
4. London dispersion forces are significant for:
a. Metals
b. Polar molecules
c. Non polar molecules
d. Ionic solids
5. London dispersion forces are the only forces present among:
a. Molecules of solids iodine
b. Atoms of water in liquid state
c. Molecules of hydrogen chloride gas
d. Atoms of helium in gaseous state at high temperature
6. Hydrogen bonding is maximum in:
a. HBr
b. H2O
c. Hl
d. HCl
7. How much more space is occupied by water on freezing:
a. 7%
b. 9%
c. 6%
d. 8%
8. The volume of ice increase than liquid water by:
a. 12%
b. 5%
c. 15%
d. 9%
9. When water freezes at 00C its density due to:
a. Change of bond lengths
b. Cubic structure of ice
c. Change of bond angles
d. Empty spaces present in the structure of ice
10. NH3 shows a maximum boiling point among the hydrates of 5th group elements due to:
a. Pyramidal structure of NH3
b. Very small size of nitrogen
c. Enhanced electronegative character of nitrogen
d. Long pair of electrons present in nitrogen
11. Acctone and chloroform are soluble in each other due to:
a. Instantaneous dipole
b. Intermolecular H-bonding
c. Ion-dipole interaction
d. All of above
12. Which of the following will have H-bonding in its molecules?
a. l2
b. C2H5OH
c. NaCl
d. CCl4
13. Which of the following has hydrogen bonding?
a. NH3
b. CH4
c. NaCl
d. CCl4
14. The liquid having highest boiling point point is:
a. Hydrogen sulphide
b. Hydrofluoric acid
c. Ammonia
d. Water
15. Which one of the following is in liquid state at room temperature?
a. Hexane
b. Methane
c. Propane
d. Ethane
16. Vapour pressure of a liquid depends upon:
a. Temperature
b. Amount of liquid
c. Size of container
d. Surface area
17. Vapour pressure of a substance does not depend upon:
a. Intermolecular forces
b. Temperature
c. Physical state of matter
d. Surface area
18. In order to mention the boiling point of water at 110 C, the external pressure should be:
a. Between 200 torr and 760 torr
b. Between 760 torr
c. Any value of pressure
d. 100 torr
19. Boiling point of H2O at mount everest would by:
a. 101 oC
b. 98 oC
c. 69 oC
d. 100 oC
20. Boiling point of H2O and C2H5OH is:
a. 98oC& 70o???????C
b. Equal
c. 100oC& 90o??????C
d. Different
21. The boling point of higher alkanes are greater than those of loweralkanes due to the reason that:
a. Higher alkanes have zigzag structures
b. Higher alkanes have greater number of atoms
c. Higher alkanes have greater hydrogen bonding
d. The polarizability of higher alkanes are greater
22. The boling point of the halogans:
a. Decreases down the group
b. Increase down the group
c. Cannot be predicated
d. Remain constant
23. At muree hills, water boils at:
a. 0oC
b. 98oC
c. 50oC
d. 100oC
24. The boiling point of glycerin at 1 atmospheric pressure (760 torr) is:
a. 290oC
b. 210oC
c. 300oC
d. 270oC
25. The boiling point of pure water at 1atm pressure is:
a. 69oC
b. 98oC
c. 120oC
d. 100oC