Chap No.5 LIQUIDS

Chap No.5 LIQUIDS

1.	Which one of the following properties can be attributed to water a. Its good conductor of electricity b. It is attracted by magnet c. It has polar covalent bond d. Both a and b	D
2.	Keerosine oil is liquid at room temperature due to a. Organic nature b. Hydrogen bonding c. Molecular size d. Dipole-dipole forces	C
3.	Which one of the following are correct concerning distilled water a. It has high dielectric constant b. It is good solvent c. It show hydrogen bonding d. All of these	D
4.	The polarity of water is useful in explaining a. The solvation process b. The ionization process The high conductivity Both a and b	D
5.	Hydrogen bonding is unimportant in a. DNA structure b. The liquid properties of water c. Liquid HF d. Liquid CH4	D
6.	London dispersion forces are present among the followings a. Polar molecules of water at room temperature b. Non-polar atoms of helium at low temperature c. Molecules of solid iodine at room temperature d. Molecules of HCl at room temperature	B
7.	Which one of the following has lowest polarizibility a. F2 b. Cl2 c. Br2 d. I2	A
8.	What is the boiling point of water at a mountain a. 100 oC b. Less than 100 oC c. Greater than 100 oC d. Greater than 150 oC	B
9.	Latent heat of vaporization of water is a. 40.7 J/mol b. 40.7 KJ/mol c. 40.7 cal/mol d. 4.7 jol/mol	B
10.	The vapour pressure of methanol at 40 oC is less than a. Water b. Glycerin c. Ether d. All of these	C
11.	Which one of the following is more volatile a. CHBr3 b. CBr4 c. CHCl3 d. CCl4	D
12.	Which one of the following has lowest boiling point a. F2 b. I2 c.Cl2 d. Br2	A
13.	Which one of the following is more sensitive to temperature a. Ionic crystal b. Solid crystal c. Liquid crystal d. All of these	C
14.	Which one of the following is strongest bond a. Covalent b. Hydrogen c. Dipole dipole d. London dispersion forces	A
15.	Hydrogen bond is …… times weaker than covalent bond a. 10 b. 20 c. 1/10 d. 1/20	B
16.	Which one of the following is weaker acid a. HF b. HCl c. HBr d. HI	A
17.	Vapour pressure can be determined by a. Barometric method b. Manometric method c. Both of these d. Non of these	C
18.	Molar heat f fusion of ice is a. 6 KJ/mol b. 40.7KJ/mol c. 62.3 KJ/mol d. Non of these	A
19.	The molar heat of vaporization of water is a. 6 KJ/mol b. 40.7KJ/mol c. 62.3 KJ/mol d. Non of these	B
20.	The molar heat of sublimation for water is a. 6 KJ/mol b. 40.7KJ/mol c. 62.3 KJ/mol d. Non of these	D
21.	The molar heat of sublimation for one mole solid I2 is a. 6 KJ/mol b. 40.7KJ/mol c. 62.3 KJ/mol d. Non of these	C
22.	The unit of surface tension is a. Nm-1 b. Jm-2 c. Both of these d. Non of these	C
23.	The surface tension can be measured by a. Torsion method b. Capillary method c. Drop method d. All of these	D
24.	The SI unit of viscosity is a. Kg m-1 s-1 b. Kg m1 s-1 c. Kg m s d. Non of these	A
25.	Liquid crystal is not used in a. Researches b. To point out potential failure c. LCD d. Non of these	D