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1. Ethanoic acid belongs to a group of acids called ________.
2. Intake of ________ in very small quantities can cause death.
3. Oils containing ________ fatty acids should be chosen for cooking.
4. Compounds with identical molecular formulas but different structures are called _________.
5. Compounds of carbon having double and triple bonds between their carbon atoms are called ________.
6. The valency of carbon is __________.

(1). Carboxylic acids, (2). Methanol, (3). Unsaturated, (4). Structural isomers, (5). Unsaturated compounds, (6). 4.

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1. Acetone is the common name of propanone. (T/ F)
2. Isomers always show same chemical properties. (T/ F)
3. Both alkenes and cycloalkanes can be represented by the same general formula. (T/ F)
4. The general formula CH2, is valid for any alkene with any number of multiple bonds. (T/ F)
5. General formula of alkanes is CnH2n+2 (T/ F)
6. Covalent compounds have low melting and boiling points as compared to ionic compounds. (T/ F)
7. Unsaturated hydrocarbon generally gives a clean flame. (T/ F)

(1). True, (2). False, (3). True, (4). False, (5). True, (6). True, (7). False

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1. Why are unsaturated hydrocarbons more reactive than saturated hydrocarbons?
2. Why is acetic acid called glacial acetic acid?
3. What is the difference in molecular masses of any two successive homologous?
4. What is the common name for Ethanoic acid?
5. What is the common name for ethyne?
6. Name the type of hydrocarbon taking part in addition reaction.

(1). Because of presence of double and triple bonds in unsaturated hydrocarbons, (2). Because it freezes during winter or under cold climatic conditions, (3). 14 units, (4). Acetic acid, (5). Acetylene, (6). Unsaturated hydrocarbon

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Section A	Section B
1). Ethane	a). Allotrope of carbon
2). Diamond	b). Friedrich Wohler
3). Urea	c). C₂H₆
4). Ethanol	d). Acetic acid
5). Ethanoic acid	e). Alcohol
6). Benzene	f). C6H6

(1). > (c), (2). > (a), (3). > (b), (4). > (e), (5). > (d), (6). > (f)