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A double bond in Oxygen (O 2 ) molecule and a triple bond in Nitrogen (N 2 ).

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Chemical Bonding and Molecular Structure

Short Answer Type

21.

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.

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22.

Why covalent compounds show isomerism but ionic compounds do not?

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23.

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.

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24.
Give the types of bond in oxygen and nitrogen molecules.

A double bond in Oxygen (O₂) molecule and a triple bond in Nitrogen (N₂).

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25.

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:

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26. Arrange LiCl, BCl₃, BeCl₂ and CCl₄ in order of increasing covalent bond character.

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27.

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

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28.

Why is sigma bond stronger than Pi bond?

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29.

How many sigma $open parentheses straight sigma close parentheses$ and $pi space left parenthesis straight pi right parenthesis$ bonds are present in a molecule of tetracyanoethylene?