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. 4 x 6.022 x 1023
Liquids and Solids
Rising of a wetting liquid in a capillary tube is due to__________________?
Rising of a wetting liquid in a capillary tube is due to__________________?
A. Surface tension
B. Cohesive forces
C. Adhesive forces
D. viscosity
The boiling point increases down the zero group element due to_________________?
The boiling point increases down the zero group element due to_________________?
A. Ion dipole forces
B. London forces
C. Hydrogen bonding
D. Dipole dipole forces
When water freezes at 0°C its density decreases due to_______________?
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 length
The conversion of vapours back into their liquid state is called__________________?
The conversion of vapours back into their liquid state is called__________________?
A. crystallization
B. evaporization
C. vaporization
D. condensation
Steam causes more sever burn than the boiling water because it possesses _________________?
Steam causes more sever burn than the boiling water because it possesses _________________?
A. Latent heat of fusion
B. Latent heat of vaporization
C. Latent heat of sublimation
D. All of the above
The density of water may be__________________?
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. All are possible
Which one is a conductor but is not malleable ?
Which one is a conductor but is not malleable ?
A. Iron
B. Graphite
C. Silver
D. Platinum
Which one of the following does not show hydrogen bonding?
Which one of the following does not show hydrogen bonding?
A. Water
B. Ethyl alcohol
C. Phenol
D. Diethyl ether
Which one is false for evaporation ?
Which one is false for evaporation ?
A. Surface phenomenon
B. Continuous
C. Exothermic
D. Cause cooling