Thiol

Q. In keto-enol tautomerism of 1, 3-dicarbonyl compounds, the enol form is preferred in contrast to the keto-enol form, this is due to:

1. Presence of carbonyl group on each side of –CH₂- group
2. Resonance stabilization of enol form
3. Presence of methylene group
4. Rapid chemical change

Q. What are the prefix and suffix for -CHO?

1. carbohydro, al
2. carboxo, carbohydrate
3. formyl, al
4. oxo, al

Q. What are the prefix and the suffix of -SH?

1. sulphato, sulphate
2. mercapto, sulphate
3. mercapto, thiol
4. sulphato, thiol

Q. The letter ‘D’ in carbohydrates signifies :

1. its configuration
2. mode of synthesis
3. dextrorotatory
4. its diamagnetic nature
   

Q. 3-Methylbutanal

Q. Name the following compound.

1. 2-mercapto butane
2. Butane thiol
3. 2-methyl propane thiol
4. 1-methyl propane thiol