Identify the types of bonds that you would expect to find in the molecules of each of the following substances:
water, ammonia and sodium chloride.

Why covalent compounds show isomerism but ionic compounds do not?

Three elements are having the following Lewis symbols:

Write the formulae and Lewis structure of the covalent compounds formed between:

(i) A and B and     (ii) A and C.

Give the types of bond in oxygen and nitrogen molecules.

The skeletal structure of CH₃COOH as shown below is correct, but some of the bonds are shown incorrectly. Write the correct Lewis structure for acetic acid:

What important characteristics should M and X have so that they form a predominantly ionic compound MX?

Why is sigma bond stronger than Pi bond?

How many sigma  and  bonds are present in a molecule of tetracyanoethylene?

30.

What is the total number of sigma and pi bonds in the following molecules?
(a) C₂H₂        (b) C₂H₄