The molecule, methylacetamide is polar or not has to be identified. Concept Introduction: The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity. A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric. I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.

Question

3. The following are some molecules:H2, HF, CO2, H2O, Cl2, NH3, CH4, CHCl3 (a) Which of the above molecules do/does not contain polar bond? Explain your answer. (b) Which covalent bond has the highest bond polarity among the eight molecules? (c) (i) Which of the above molecules are non-polar molecules? (ii) Explain why these molecules are non-polar. 4. (d) Draw a diagram to illustrate the formation of hydrogen bonds in H2O.

Answer 1

Question

Chapter 8, Problem 90IL

(a)

Interpretation Introduction

Interpretation:

The molecule, methylacetamide is polar or not has to be identified.

Concept Introduction:

The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity.

A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric.

I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.

(b)

Interpretation Introduction

Interpretation:

The expected position of positive and negative charges in methylacetamide has to be predicted and also identify whether the electrostatic potential surface confirm the prediction.

Concept Introduction:

Electrostatic potential surface or maps are known as molecular electrical potential surfaces, that illustrates the charge distributions of molecules three dimensionally.

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