The reason for the low recovery of the crystal in the experiment performed by crystallization of biphenyl needs to be explained, if the sample weigh 0.5 g with 5% impurity and after crystallization the crystal dried and weigh 0.02 g. Concept Introduction: Organic compounds are mainly covalent compounds in which C-C, C-H and C-X bonds are present. Here, 'X' indicates heteroatom which is present in functional group . The C-C and C-H bonds are non-polar covalent bonds as the difference between the electronegativity of C and H is very less. On the contrary the polarity of C-X bond depends on the electronegativity of X. If X is O, N or halogen, the C-X bond will be a polar covalent bond that makes the polar organic molecule. A polar covalent molecule will be soluble in water whereas a non-polar covalent compound will be insoluble in water based on the concept of "Like dissolves like". Some of the polar compounds are also not soluble in water as they cannot form hydrogen bonding with water molecules.

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Chapter 2, Problem 3Q

Interpretation Introduction

Interpretation:

The reason for the low recovery of the crystal in the experiment performed by crystallization of biphenyl needs to be explained, if the sample weigh 0.5 g with 5% impurity and after crystallization the crystal dried and weigh 0.02 g.

Concept Introduction:

Organic compounds are mainly covalent compounds in which C-C, C-H and C-X bonds are present. Here, 'X' indicates heteroatom which is present in functional group. The C-C and C-H bonds are non-polar covalent bonds as the difference between the electronegativity of C and H is very less. On the contrary the polarity of C-X bond depends on the electronegativity of X. If X is O, N or halogen, the C-X bond will be a polar covalent bond that makes the polar organic molecule.

A polar covalent molecule will be soluble in water whereas a non-polar covalent compound will be insoluble in water based on the concept of "Like dissolves like". Some of the polar compounds are also not soluble in water as they cannot form hydrogen bonding with water molecules.

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