MCQ
Amongst the following, the strongest base in aqueous medium is $.........$
- A$\mathrm{CH}_3 \mathrm{NH}_2$
- B$\mathrm{NCCH}_2 \mathrm{NH}_2$
- ✓$\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$
- D$\mathrm{C}_6 \mathrm{H}_5 \mathrm{NHCH}_3$
✓
Answer
Correct option: C.
$\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$
Due to the electron releasing nature of alkyl group, it $(R)$ pushes electrons towards nitrogen and thus makes the unshared electron pair more available for sharing with the proton of the acid. Moreover, the substituted ammonium ion formed from the amine gets stabilised due to dispersal of the positive charge by the $+I$ effect of the alkyl group. Hence, alkylamines are stronger bases than ammonia.
Thus, the basic nature of aliphatic amines should increase with increase in the number of alkyl groups.
Thus, the basic nature of aliphatic amines should increase with increase in the number of alkyl groups.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which element belongs to $ d -$ block
→Acetophenone $\xrightarrow{{HC{O_3}H}}A\xrightarrow{{{H_3}{O^ + }}}B + C$$\mathop {\xrightarrow{{Pthalic\,Anhydride}}}\limits_{{H^ + }} $ Indicator $(D)$
→$C$ and $ D$ are
$Fe ^{3+}$ is reduced to $Fe ^{2+}$ by using
→$(A)$ $H _2 O _2$ in presence of $NaOH$
$(B)$ $Na _2 O _2$ in water
$(C)$ $H _2 O _2$ in presence of $H _2 SO _4$
$(D)$ $Na _2 O _2$ in presence of $H _2 SO _4$
Which of the following options is not a viable option?
Identify the compound Y in the following reaction.
Which of the following aquated metal ions has the highest paramagnetism?
If the $\Delta G$ of a cell reaction $AgCl + {e^ - } \to Ag + C{l^ - }$ is $ - 21.20\;KJ$; the standard e.m.f., of cell is ............ $\mathrm{V}$
→Fluorine is a better oxidising agent than $B{r_2}$. It is due to
→The differential rate law for the reaction ${H_2} + {I_2} \to 2HI$ is
→Which one of the following is a water soluble vitamin, that is not excreted easily?