Question
Explain the effect of substitutents on the basic strength of aromatic amines.

Answer

SELF

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Explain the general characteristics of actinoids in the following terms:
(i) Physical properties
(ii) Chemical reactivity
(iii) Magnetic properties
(iv) Ionization enthalpy.
  1. A blackish brown coloured solid $‘A’$ when fused with alkali metal hydroxides in presence of air, produces a dark green coloured compound $‘B’$, which on electrolytic oxidation in alkaline medium gives a dark purple coloured compound $C.$ Identify $A, B$ and $C$ and write the reactions involved.
  2. What happens when an acidic solution of the green compound $(B)$ is allowed to stand for some time? Give the equation involved. What is this type of reaction called?
Explain the terms primary and secondary structure of proteins. What is the difference between α-helix and β-pleated sheet structure of proteins?
How will you convert ethyl bromide into:
(i) ethane, (ii) butane, (iii) propanoic acid, and (iv) ethoxyethane?
Calculate the depression in the freezing point of water when $10 g$ of $CH_3CH_2CHClCOOH$ is added to $250 g$ of water. $K_a = 1.4 \times 10^{–3}, K_f = 1.86 K \ kg\ mol^{–1}.$
Match the coordination compounds given in Column $I$ with the central metal atoms given in Column $II$ and assign the correct code:
 
Column $I ($Coordination Compound$)$
 
Column $II ($Central metal atom$)$
$a.$
Chlorophyll
$1.$
Rhodium
$b.$
Blood pigment
$2.$
Cobalt
$c.$
Wilkinson catalyst
$3.$
Calcium
$d.$
Vitamin $B_{12}$
$4.$
Iron
 
 
$5.$
Magnesium
Code:
Describe the common name system and IUPAC system of naming amines.
What is imperfections? How many types of its? Explain.
i. Give reasons :
a. Although $- \ce{NH2}$ group is o/p directing in electrophilic substitution reactions, yet aniline, on nitration gives good yield of $m-$nitroaniline.
b. $(\ce{CH 3)2NH}$ is more basic than $(\ce{CH3)3N}$ in an aqueous solution.
c. Ammonolysis of alkyl halides is not a good method to prepare pure primary amines.
ii. Distinguish between the following:
a. $\ce{CH 3 CH 2 NH 2}$ and $(\ce{CH 3 CH 2)2NH}$
b. Aniline and $\ce{CH3NH2}$
Answer the following questions:
Give chemical reactions for the following observations:
  1. Potassium permanganate is a good oxidising agent in basic medium.
  2. Inter convertibility of chromate ion and dichromate ion in aqueous solution depends upon pH of the solution.
  3. Potassium permanganate is thermally unstable at 513K.