Which of the following compounds possesses the highest melting point?

1. BeCl₂

2. MgCl₂

3. CaCl₂

4. SrCl₂

The diamagnetic species among the following is:

1. NO

2. CO

3. O₂

4. B₂

Which of the statements are not true for AlCl₃-

1. AlCl₃ fumes in moist air forms HCl with moisture

2. Anhydrous AlCl₃ exists as Al₂Cl₆

3. Anhydrous AlCl₃ is ionic

4. Anhydrous AlCl₃ is trigonal planar molecule at higher temperature

Valency is best described as:

1. Total electrons in an atom

2. Atomicity of an element

3. Oxidation number of an element

4. Combining capacity of an element

Compounds that have a maximum value of lattice energy among the following, is:
 

A Compound with maximum ionic character is formed from:

The crystal lattice of electrovalent compound is composed of :

1. Atoms

2. Molecules

3. Oppositely charged ions

4. Both molecules and ions

Ions are formed from neutral atoms by-

1. Loss of electrons

2. Gain of electrons

3. Sharing of electrons

4. Loss and gain of electrons

Most covalent compound among the following is :

The correct order of covalent bond character among
LiCl, BeCl₂, BCl₃ and CCl₄, is:

1. LiCl < BeCl₂ > BCl₃ > CCl₄

2. LiCl > BeCl₂ < BCl₃ < CCl₄

3. LiCl < BeCl₂ < BCl₃ < CCl₄

4. LiCl > BeCl₂ > BCl₃ > CCl₄