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Question : 9
Total: 15
Consider the following organic compounds: (a) Name the functional group present in their compounds.
(i)H −
−
−
= 0 H −
−
= O
(b) Write the general formula for the compounds of this functional group.(c) State the relationship between these compounds and draw the structure of any other compound having similar functional group.OR
(a) Draw the electron dot structure for ethyne.
[ 1 + 2 = 3 ]
(b) List two differences between the properties exhibited by covalent compounds and ionic compounds.
(i)
(b) Write the general formula for the compounds of this functional group.(c) State the relationship between these compounds and draw the structure of any other compound having similar functional group.OR
(a) Draw the electron dot structure for ethyne.
(b) List two differences between the properties exhibited by covalent compounds and ionic compounds.
Solution:
(a) Aldehyde
(b)R − CHO R
(c) These two compounds form the homologous series as they differ by aCH 2
Butanal:
(b)
(c) These two compounds form the homologous series as they differ by a
Butanal:
Or
(b) The difference between Covalent and Ionic Compounds are:
| Covalent Compounds | Ionic Compounds |
|---|---|
| 1. Covalent compounds are formed by the sharing of electrons between two atoms. | Ionic compounds are formed by the complete transfer of electrons. |
| 2. They exist in all three states - solid, liquid, gases | The exist in solidstate only |
| 3. They have low melting and boiling point. | They have high melting and boiling point. |
| 4. They are generally insoluble in water. | They are soluble in water. |
| 5. They are insulators i.e., they do not conduct electricity in the molten state as well as in aqueous solutions. | Ionic compounds are good conductors of electricity in the molten state as well as in aqueous solutions. |
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