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

Which has strongest bonding in the solid state ? A. Hydrogen Chloride (HCI) B. Chlorine (Cl2) C. Xenon(Xe)D. Sodium Chloride (NaCI)

All the enthalpy changes are________________? A. Negative B. PositiveC. May or may not be A or B D. none

The pressure during the molar heat of fusion is kept________________? A. 0 atmosphereB. one atmosphere C. 2 atmosphere D. 10 atmosphere

Isomorphic substances have _______________? A. Same physical and chemical properties B. Same physical and different chemical properties C. Different physical and same chemical propertiesD. Different physical and chemical properties

Bucky balls is an allotropic from of__________________? A. SulphurB. Carbon C. Silica D. Tin

The phenomenon in which a compound exists in two or more crystalline forms is called ________________? A. IsomorphismB. Polymorphism C. Anisotropy D. Allotropy

Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________? A. More strength of H-bondingB. More strength of London forces C. Less polarizability D. All of the above

Amorphous substances posses_________________? A. No definite geometry B. No definite heat of fusionC. No sharp melting points D. All of the above

A solid may be made up of_________________? A. Atoms B. Ions C. MoleculesD. A, B, and C