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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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Which of the following molecules contain polar covalent hands?

msp;  a .  water ,  H 2 0                                                                               c .  fluorine ,  F 2 b .  carbon monoxide ,  CO                                     d .  nitrogen ,  N 2

Interpretation Introduction

Interpretation:

Among the given molecules, the molecule that contains the polar covalent bonds is to be identified.

Concept Introduction:

The chemical bond that exists between two atoms in which electrons are distributed in an unequal amount is known as polar bond. Due to this unequal distribution of electrons, the molecule will possess the dipole moment in which one end will have partial positive charge and other end will have partial negative charge.

The bond that is partially polar and partially covalent is known as polar covalent bond.

Explanation

Reason for correct option:

(a) It is correct that water, H2O contains the polar covalent bonds as explained below.

The electronegativity value of oxygen is 3.5.

The electronegativity value of hydrogen is 2.1.

The difference in the electronegativity values for HO bond is,

Differenceinelectronegativity for HO bond=3.52.1=1.4

The difference in the electronegativity values for HO bond is 1.4. Thus, this small difference in the electronegativity values shows that HO bond is polar covalent in nature

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