Unit of heat in SI system is________________?
A. J
B. KCaL
C. Cal
D. GJ
Chemistry MCQs
________________ is study about energy of a chemical system ?
A. thermochemistry
B. thermodynamics
C. chemical kinetics
D. stoichiometry
Which of the following has strongest intermolecular forces of attraction ?
A. Hydrogen (H2)
B. Chlorine (Cl2)
C. lodine (I2)
D. Methane (CH4)
When substance moves from a solid to a liquid state all of the following changes occur except__________________?
A. Molecules become more disordered
B. K.E of the molecules decreases
C. Intermolecular forces become weaker
D. Molecule become further separated
In order to mention the boiling point of water at 110°C the external pressure should be ?
A. Between 760 torr and 1200 torr
B. Between 200 torr and 760 torr
C. 765 torr
D. any value of pressure
Vapour pressure of water at 100°C is___________________?
A. 55 mm Hg
B. 760 mm Hg
C. 355 mm Hg
D. 1489 mm Hg
Liquid crystal is discovered by __________________?
A. William Crooks
B. Fredrack Reinitzer
C. J.J Thomson
D. Bravis
Hydrogen bonding is involved in____________________?
A. Solubility
B. Cleansing action of detergents
C. Biological molecules
D. All
Forces of attraction which may be present between all kinds of atoms and molecules are _____________________?
A. intramolecular
B. intermolecular
C. van der Waal
D. Dipole-induced dipole
The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?
A. vaporization
B. evaporation
C. crystallization
D. sublimation
