MCQ
Among the following amines, the strongest Bronsted base is __________.
  • A
  • B
    $\mathrm{NH_3}$
  • C

Answer

Correct option: D.
Aniline is weaker base than $NH_3$ due to delocalization of lone pair of electrons on the N-atom into the benzene ring. Pyrrole (c) is not at all basic because the lone pair of electrons on N-atom is donated towards aromatic sextet formation. Therefore, pyrrolidine (d) has a strong tendency to accept a proton and is hence, the strongest base.

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

Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a $......$
$A.$ Monosaccharide
$B.$ Disaccharide
$C.$ Reducing sugar
$D.$ Non$-$reducing sugar
According to Lewis concept of acids and bases, ether is
Which statement is correct for product $‘X’$ ?

$\begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C \equiv CH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {Cl - C - C{H_2} - C - C{H_2} - C{H_2} - C - C{H_3}} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_2}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C \equiv N\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}$ $\xrightarrow[{BaS{O_4}}]{{{H_2}/Pd}}\,'X'$

The rate constant for a first order reaction is $20\,min ^{-1}$. The time required for the initial concentration of the reactant to reduce to its $\frac{1}{32}$ level is $........\times 10^{-2}\,min$. (Nearest integer)(Given: $\quad \ln 10=2.303, \log 2=0.3010)$
Which one of the following metals can not be obtained on electrolysis of aqueous solution of its salts ?
Maximum ferromagnetism is found in?
Amongst the following electrodes the one with zero electrode potential is
The increasing order of the reactivity of the following halides for the $S_N1$ reaction is

$(I)\,\begin{array}{*{20}{c}}
  {C{H_3}CHC{H_2}C{H_3}} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {Cl\,\,\,\,\,\,\,\,\,} 
\end{array}$

$(II)\,CH_3CH_2CH_2Cl$

$(III)\,H_3CO-C_6H_4-CH_2Cl$

For making $Ag$ from $AgN{O_3}$, which of the following is used
A $20\, ml$ sample of a $0.2\, M$ solution of the weak diprotic acid $H_2A$ is titrated with $0.25\, M\, NaOH$, Molarity of solution at the second equivalent point is