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Hassan
1.Vapour pressure of water at 100 degrees C is
A. 55 mm Hg
B. 760 mm Hg
C. 355 mm Hg
D. 55 mm Hg
2.Which one of the following does not show hydrogen bonding?
A. Water
B. Ethyl alcohol
C. Phenol
D. Water
3.Liquid crystal is discovered by
A. William Crooks
B. Fredrick Reinitzer
C. J.J Thomson
D. William Crooks
4.Which one is a conductor but is not malleable?
A. Iron
B. Graphite
C. Silver
D. Iron
5.Hydrogen bonding is involved in
A. Solubility
B. Cleansing action of detergents
C. Biological molecules
D. Solubility
6.Actually, the vapour pressure on the surface of a liquid in the flask is equal to
A. -h
B. Pa-Oh
C. Pa + -h
D. -h
7.Forces of attraction which may be present between all kinds of atoms and molecules are
A. intramolecular
B. intermolecular
C. van der Waal
D. intramolecular
8.The density of water may be
A. Equal to that of ice
B. Greater than that of ice
C. Less than that of ice
D. Equal to that of ice
9.The quantity of heat required to convert one mole of liquid into its vapors at its boiling point is called molar heat of.
A. Vaporization
B. Evaporation
C. Crystallization
D. Vaporization
10.Steam causes more severe burn than the boiling water because it possesses.
A. Latent heat of fusion
B. Latent heat of vaporization
C. Latent heat of sublimation
D. Latent heat of fusion
11.Water has a maximum density at
A. 0°C
B. 2°C
C. 4°C
D. 0°C
12.The conversion of vapours back into their liquid state is called
A. Crystallization
B. Vaporization
C. Vaporization
D. Crystallization
13.Formation of vapours from the surface of a liquid is called
A. Vapourization
B. Evaporation
C. Condensation
D. Vapourization
14.When water freezes at 0°C its density decreases due to
A. Change of bond angles
B. Cubic structure of ice
C. Empty space present in the structure of ice
D. Change of bond angles
15.The attractive forces between the partially positive end of one molecule and partial negative end of other molecule are called
A. Dipole-dipole forces
B. Ion dipole-dipole forces
C. London dispersion forces
D. Dipole-dipole forces
16.The boiling point increases down the zero group element due to
A. Ion-dipole forces
B. London forces
C. Hydrogen bonding
D. Ion-dipole forces
17.Vapor pressure is not affected by
A. Surface area
B. temperature
C. intermolecular forces
D. Surface area
18.Rising of a wetting liquid in a capillary tube is due to
A. Surface tension
B. Cohesive forces
C. Adhesive forces
D. Surface tension
19.Table salt crystallizes with a
A. Face centred cubic lattice
B. body centred cubic lattice
C. simple cubic lattice
D. Face centred cubic lattice
20.The number of formula units in 29.25g of common salt
A. 6.022 x 1023
B. 3.01 x 1023
C. 2 x NA
D. 6.022 x 1023
21.During which process empty spaces between particles become minimum?
A. ionization
B. condensation
C. fusion
D. ionization
22.Liquid gets the shape of the container when it is poured into it. Which one of the following reason justifies it?
A. Liquid does not have a definite shape
B. The liquid does not have a definite volume
C. The liquid is highly compressible
D. Liquid does not have a definite shape
23.Which one of the following has the highest volatility
A. Diethyl ether
B. Ethyl alcohol
C. Water
D. Diethyl ether
24.Molar heat of vaporization of water is
A. 40.7 KJ/mole
B. 40.7 J/mole
C. 40.7 cal/mole
D. 40.7 KJ/mole
25.If we provide very high amount of heat to a liquid its boiling point will
A. increase
B. remains constant
C. decrease
D. increase
26.Crystallites are present in
A. crystalline solids
B. amorphous solids
C. liquid crystals
D. crystalline solids
27.A solid may be made up of
A. Atoms
B. Ions
C. Molecules
D. Atoms
28.A malleable solid is one which can be
A. Converted into wires
B. Converted into thin sheets
C. Melted easily
D. Converted into wires
29.Amorphous substances posses
A. No definite geometry
B. No definite heat of fusion
C. No sharp melting points
D. No definite geometry
30.Crystalline solids can be identified easily from their
A. Sharp melting point
B. Definite geometry
C. Transition temperature
D. Sharp melting point
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