The pressure during the molar heat of fusion is kept________________?

A. 0 atmosphere
B. One atmosphere
C. 2 atmosphere
D. 10 atmosphere

All the enthalpy changes are________________?

A. Negative
B. Positive
C. May or may not be a or b
D. None

Which has strongest bonding in the solid state ?

A. Hydrogen chloride (hci)
B. Chlorine (cl2)
C. Xenon(xe)
D. Sodium chloride (naci)

When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?

A. Abab (hexagonal)
B. Abcabc (cubic)
C. Orthor hombic
D. Rhombohedral

Table salt crystallizes with a______________________?

A. Face centered cubic lattice
B. Body centered cubic lattice
C. Simple cubic lattice
D. Othorhombic lattice

During which process empty spaces between particles become minimum ?

A. Ionization
B. Condensation
C. Fusion
D. Evaporation

Which one of the following has highest volatility_________________?

A. Diethyl ether
B. Ethyl alcohol
C. Water
D. Ethylene glycol

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

A solid may be made up of_________________?

A. Atoms
B. Ions
C. Molecules
D. A, b, and c

Amorphous substances posses_________________?

A. No definite geometry
B. No definite heat of fusion
C. No sharp melting points
D. All of the above