Liquid crystal is discovered by __________________?
(A) William Crooks
(B) Fredrack Reinitzer
(C) J.J Thomson
(D) Bravis
Vapour pressure of water at 100°C is___________________?
(A) 55 mm Hg
(B) 760 mm Hg
(C) 355 mm Hg
(D) 1489 mm Hg
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
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
Which of the following has strongest intermolecular forces of attraction ?
(A) Hydrogen (H2)
(B) Chlorine (Cl2)
(C) lodine (I2)
(D) Methane (CH4)
________________ is study about energy of a chemical system ?
(A) thermochemistry
(B) thermodynamics
(C) chemical kinetics
(D) stoichiometry
Total energy of a system is_________________?
(A) P.E + K.E
(B) P.E + heat energy
(C) K.E + heat energy
(D) P.E + mechanical energy
If we provide very high amount of heat to a liquid its boiling point will__________________?
(A) increase
(B) remains constant
(C) decrease
(D) there will be no boiling