Why is the formula weight appropriately used instead of the molecular weight in the case of the ionic compounds?

Define the Octet rule. Give two examples of such compounds in which an exception to the Octet rule is observed. OR Write two important differences between ionic and covalent compounds.

Distinguish between naphthalene and sodium chloride by two physical properties.

Which of the following compounds has no existence as a separate and distinct molecule? (a) H₂S (b) CHCl₃ (c) NO₂ (d) NaCl

Give an example of a solid and a liquid covalent compound.

KCl is soluble in which of water and benzene ?

The electronic configuration of Na and Cl atoms in the compound NaCl is (a) Na - 2, 8, 8 : Cl - 2, 8 (b) Na - 2, 8, 7 : Cl - 2, 8, 1 (c) Na - 2, 8, 1 : Cl - 2, 8, 7 (d) Na - 2, 8, : Cl - 2, 8, 8

Which compound is formed by the reaction of atmospheric nitrogen and oxygen as a result of lightning?

Mention one reason for the relative chemical inertness of N2. OR Of the two substances used for the production of urea one is carbon dioxide, what is the other?

Write whether the following statement is true or false: The formation of an ionic compound is made possible largely by the formation of a stable ionic network.

How many covalent bonds are present in CHCl3 molecules?

Give an example of a covalent liquid.