Aliphatic and Aromatic Amines Quiz-3
Dear Readers,
The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry..
Q1. Acetoneoxime on catalytic hydrogenation gives:
Solution
Isopropylamine
Isopropylamine
Q2.Which one does not liberate 
when undergoes hydrolysis?
when undergoes hydrolysis?
Solution
Isocyanide on hydrolysis forms primary amine not ammonia.
Isocyanide on hydrolysis forms primary amine not ammonia.
Q3. In aqueous solutions, the basic strength of amines decreases in the order
Solution
Basicity of amines depends upon the availability of lone pair of electrons of nitrogen for donation. Electron releasing group increases the electron density over nitrogen, thus increases the basic character. 3° methyl amine although contains three electron realeasing groups but is least basic because of steric hindrance. Hence, the order of basic character is
Basicity of amines depends upon the availability of lone pair of electrons of nitrogen for donation. Electron releasing group increases the electron density over nitrogen, thus increases the basic character. 3° methyl amine although contains three electron realeasing groups but is least basic because of steric hindrance. Hence, the order of basic character is
Q4. The correct order of basicities of the following compound is
Solution
1>3>2>4
1>3>2>4
Q5.
The product is:
Solution
Q6. An aliphatic nitro compound turns red with the addition of a concentrated NaOH solution, followed
by the addition of an excess of an 
solution and then dilute 
. The colour
solution and then dilute 
. The colour disappears with the addition of the excess of an acid but reappears if the solution is made alkaline.
The aliphatic nitro compound is
-
-
-
- All of these
Solution
Primary nitro alkanes when treated with nitrous acid from nitrolic acid which when dissolve in alkali gives, salt of nitrolic acid which is red in colour. In excess of acid, the salt dissociated, thus colour disappears while in excess of alkali the red colour reappears
Primary nitro alkanes when treated with nitrous acid from nitrolic acid which when dissolve in alkali gives, salt of nitrolic acid which is red in colour. In excess of acid, the salt dissociated, thus colour disappears while in excess of alkali the red colour reappears
Q7.Which of the following reaction will not occur?
Solution
Q8.Biuret test is not given by:
Solution
Biuret test is given by compounds having
gp.
Biuret test is given by compounds having
gp.
Q9.The correct order of basicities of the following compounds is:
Solution
Negative charge developed on N in the resonance hybrid makes it more basic as it loses electron pair readily. Also 2 ͦ amine is more basic than 1 ͦ amine due to +ve IE of alkyl group. In amide the lone pair remains less available due to delocalisation in resonance.
Negative charge developed on N in the resonance hybrid makes it more basic as it loses electron pair readily. Also 2 ͦ amine is more basic than 1 ͦ amine due to +ve IE of alkyl group. In amide the lone pair remains less available due to delocalisation in resonance.
Q10. Choose the amide which on reduction with LAH yields a secondary amine
Solution
Secondary amides such as N-methylethanamide on reduction with LAH give secondary amines.
Secondary amides such as N-methylethanamide on reduction with LAH give secondary amines.
