Liquids and Solids test 4

11:12:00 Unknown 0 Comments

A test from chapter 4 i.e Liquids and Solids part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. Trend of boiling points of halogens from fluorine to iodine is that it.

A) decreases
B) increases
C) remains constant
D) negligible

2. Molecules of hydro carbons with large chain lengths experience

A) repulsive forces
B) strong attractive force
C) weaker attractive forces
D) no attractive force

3. Hydrocarbons which generally have high molecular masses exist is.

A) solid form
B) liquid form
C) vapour form
D) gaseous form

4. Exceptionally low acidic strength of HF is due to

A) strong polar bond
B) small size of fluorine
C) strong hydrogen bonding
D) Vander Waal’s forces

5. Long chain of amino acids are coiled about one another into spiral by.

A) covalent bond
B) ionic bond
C) hydrogen bond
D) Vander Waal’s forces

6. Evaporation of water is possible at

A) 100 C
B) 0 C
C) at all temperatures
D) above 100 C

7. Boiling point is low for liquid with

A) high vapour pressure at given temperature
B) low vapour pressure at a given temperature
C) very high vapour pressure
D) very low vapour pressure

8. At equilibrium rate of evaporation and rate of condensation

A) become very high
B) become very low
C) can never be equal
D) become equal

9. In an open system vapour pressure of water at 100oC at sea level is

A) 700 mm of Hg
B) 760 mm of Hg
C) 670 mm of Hg
D) 1000 mm of Hg

10. Molar heat of vaporization of water is

A) 140.6 kJ/mol
B) 14.06 kJ/mol
C) 18 kJ/mol
D) 40.6 kJ/mol