Hydrocarbons · Chemistry · WB JEE
MCQ (Single Correct Answer)
1
Which of the following hydrocarbons reacts easily with $\mathrm{MeMgBr}$ to give methane?
WB JEE 2025
2
An optically active alkene having molecular formula $\mathrm{C}_8 \mathrm{H}_{16}$ gives acetone as one of the products on ozonolysis. The structure of the alkene is
WB JEE 2025
3
The decreasing order of reactivity of the following alkenes towards $$\mathrm{HBr}$$ addition is
WB JEE 2024
4
The compounds A and B are respectively
WB JEE 2024
5
$$\mathrm{Q}$$ and $$\mathrm{R}$$ in the above reaction sequences are respectively
WB JEE 2024
6
Structure of M is,
WB JEE 2023
7
'$$\underline G $$' in the above sequence of reactions is
WB JEE 2023
8
The major product of the following reaction is
$${F_3}C - CH = C{H_2} + HBr \to $$
WB JEE 2022
9
The exact order of boiling points of the compounds n-pentane, isopentane, butanone and 1-butanol is
WB JEE 2021
10
The total number of alkyl bromides (including stereoisomers) formed in the reaction $$M{e_3}C - CH = C{H_2} + HBr \to $$ will be
WB JEE 2020
11
CH3 $$-$$ C $$ \equiv $$ C MgBr can be prepared by the reaction of
WB JEE 2018
12
The isomerisation of 1-butyne to 2-butyne can be achieved by treatment with
WB JEE 2017
13
Which of the following reactions will not result in the formation of carbon-carbon bonds?
WB JEE 2016
14
Ozonolysis of an alkene produces only one dicarbonyl compound. The structure of the alkene is
WB JEE 2016
15
Identify X in the following sequence of reactions.
WB JEE 2016
16
The major products obtained during ozonolysis of 2, 3-dimethyl-1-butene and subsequent reductions with Zn and H2O are
WB JEE 2016
MCQ (More than One Correct Answer)
1
Which of the following statements about the $$\mathrm{S}_{\mathrm{N}} 2$$ reaction mechanism is/are true?
WB JEE 2024
2
Which of the following reactions give(s) a meso-compound as the main product?
WB JEE 2020
3
$$Me - C \equiv C - Me\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{EtOH, - 33^\circ C}^{Na/N{H_3}(liq.)}} \underline{\underline X} \,\buildrel {dil.alkaline\,KMn{O_4}} \over
\longrightarrow \,\text{Product(s)}$$
The product(s) from the above reaction will be
The product(s) from the above reaction will be
WB JEE 2020