MCQ
Correct reactivity order of Alkyl halide towards dehydrohalogenation-
- ✓$3^o > 2^o > 1^o$
- B$1^o > 2^o > 3^o$
- C$2^o > 1^o > 3^o$
- D$1^o > 3^o > 2^o$
✓
Answer
Correct option: A.
$3^o > 2^o > 1^o$
a
According to Saytzeff rule, any alkyl halide that gives a more highly substituted (more stable) alkene undergoes dehydrohahyenation faster than the one which gives a less highly substituted (less stable) alkane. Thus, the case of dehydrohalogenation of different alkyl halides having the same halogen decreases in the order: $3^{\circ} (tertiary) > 2^{\circ} (secondary) > 1^{\circ} (Primary)$
According to Saytzeff rule, any alkyl halide that gives a more highly substituted (more stable) alkene undergoes dehydrohahyenation faster than the one which gives a less highly substituted (less stable) alkane. Thus, the case of dehydrohalogenation of different alkyl halides having the same halogen decreases in the order: $3^{\circ} (tertiary) > 2^{\circ} (secondary) > 1^{\circ} (Primary)$
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
Electrophilic substitution reaction in phenol takes place at:
value of $x$ is
→Consider the following $E_1 /S_{N^1}$ reaction
→The missing product $(s)$ is $(are)$
In an experiment, $m$ grams of a compound $X$ (gas/liquid/solid) taken in a container is loaded in a balance as shown in figure $I$ below. In the presence of a magnetic field, the pan with $X$ is either deflected upwards (figure $II$), or deflected downwards (figure $III$), depending on the compound $X$. Identify the correct statement($s$)
→$(A)$ If $X$ is $H _2 O (l)$, deflection of the pan is upwards.
$(B)$ If $X$ is $K _4\left[ Fe ( CN )_6\right](s)$, deflection of the pan is upwards.
$(C)$ If $X$ is $O _2(g)$, deflection of the pan is downwards.
$(D)$ If $X$ is $C _6 H _6(l)$, deflection of the pan is downwards.
A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has emf of $2.7$ volts. If the standard reduction potential of copper electrode is $+ 0.34 $ volt that of magnesium electrode is .............. $\mathrm{V}$
→$(A)$ $C_3H_6O$ $\mathop {\xrightarrow{{NaCN}}}\limits_{{H_2}S{O_4}} $ cyanohydrin of $(A).$ If the cyanohydrin is optically active, then the possible structure of $(A)$ is
→Which of the following do not give aliphatic primary amine as product
Iodoform heated with $ Ag $ powder to form
→Aldol condensation involving $C{H_3}CHO + C{H_3}CHO$ gives the product
→Low concentration of oxygen in the blood and tissues of people living at high altitude is due to $......$
→