Question 1. reactions which involve alcohol and acid is called?
- Carboxylation
- Esterification
- Neutralization
- Acylation
Answer is B. Esterification
Question 2. ____ restore the red colouration of Schiff?
Option
A. Ketone
B. Aldehyde
C. Carbohydrate
D. Non of the above
Answer is B aldehyde
Question 3. Metal hydroxide is horrible in water why the parent compound maintain is not this is because_____?
Option
A. the substituted hydroxyl group is donated by water
B. Hydrogen bonding in alcohol influence their solubility in water
C. The compound has high propensity to form methane in the present of water
D. Methane is gaseous why metal hydroxide is liquid at room temperature
Answer is B. hydrogen bonding in alcohol influence their solubility in water
Question 4. A grignard reagent has the formula_____?
A. RmgX
B. RMgx
C. RMX
D. RgMX
Answer is A. RmgX
Question 5. saturated carboxilic acid as solid at room temperature because?
A. Their regular nature of aliphatic chains allow the molecules to be parked in close parallel alignment
B. Because they have single bond in their hydrocarbon chain
C. Because they have double bond in their hydrocarbon chain
D. Because they are found in natural fats and oils
Discussion
When fatty acids which is saturated boxylic acid made up of single bond that render the hydrocarbons of that carboxylic acid to be solid
But when the same caboxylic acid is made up of double bond it render that caboxylic acid to be liquid.
In case national open university if you choose B, you will score zero.
So the right answer yo noun student is A. Their regular nature of aliphatic chain allow the molecules to be parked in a closed parallel alignment.
Question 6. ____ is a weak oxidizing agent which reacts with the high to give carboxylate?
Option
A. Schiff’s reagent
B. A and B
C. Fehling solution
D. Non of the above
The answer is C. Fehling solution
Question 7. the most commonly used alcohol as solvent are?
Option
A. butanol and pentanone
B. Methyl propanol and hexanol
C. Phenol and cyclohexanol
D. Ethanol and methanol
Answer is D. Ethanol and methanol
Question 8. One of these example of alcohol is denser than water identify which one?
Option
A. Cyclohexanol
B. Phenol
C. Butanol
D. Propanol
Answer is A. Cyclohexanol
Question 9. Which of the under listed properties of alcohol does not affect it density?
Option
A. Strong intermolecular hydrogen bond
B. The molecular weight of the alcohol
C. branching or present of side group on the alcohol
D. None of the above
Answer to this question can be dropped as comments below
Be the first to comment