Q 1 :

Which one of the following compounds can exist as cis-trans isomers?           [2025]

• 1,1-Dimethylcyclopropane

   

• 1,2-Dimethylcyclohexane

   

• Pent-1-ene

   

• 2-Methylhex-2-ene

   

Q 2 :

Baeyer’s reagent is                              [2024]

• acidic potassium permanganate solution

   

• acidic potassium dichromate solution

   

• cold, dilute, aqueous solution of potassium permanganate

   

• hot, concentrated solution of potassium permanganate.

   

Q 3 :

For the given reaction:

'P' is                                           [2024] 

Q 4 :

Which amongst the following compounds will show geometrical isomerism?          [2023]

• Pent-1-ene

   

• 2,3-Dimethylbut-2-ene

   

• 2-Methylprop-1-ene

   

• 3,4-Dimethylhex-3-ene

   

Q 5 :

Compound X on reaction with ${\mathrm{O}}_3$ followed by $\mathrm{Zn}/{\mathrm{H}}_2\mathrm{O}$ gives formaldehyde and 2-methylpropanal as products. The compound X is      [2022]

• 3-methylbut-1-ene

   

• 2-methylbut-1-ene

   

• 2-methylbut-2-ene

   

• pent-2-ene

   

Q 6 :

The major product of the following chemical reaction is               [2021]

Q 7 :

An alkene on ozonolysis gives methanal as one of the products. Its structure is             [2020]

Q 8 :

An alkene A on reaction with ${\mathrm{O}}_3$ and Zn–${\mathrm{H}}_2\mathrm{O}$ gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene A gives B as the major product. The structure of product B is             [2019]

Q 9 :

The most suitable reagent for the following conversion is                [2019]

• ${\mathrm{Hg}}^{2+}/{\mathrm{H}}^{+},{\mathrm{H}}_2\mathrm{O}$

   

• Na/liquid ${\mathrm{NH}}_3$

   

• ${\mathrm{H}}_2$, Pd/C, quinoline

   

• Zn/HCl

   

Q 10 :

Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?        [2016]
 

• 

   

• ${\mathrm{H}}_3\mathrm{C}-{\mathrm{H}}_2\mathrm{C}-{\mathrm{CH}}_2\mathrm{OH}$

   

• ${\mathrm{H}}_2\mathrm{C}=\mathrm{C}=\mathrm{O}$

   

• ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-{\mathrm{CH}}_2\mathrm{Br}$

   

Q 11 :

The compound that will react most readily with gaseous bromine has the formula              [2016]
 

• ${\mathrm{C}}_3{\mathrm{H}}_6$

   

• ${\mathrm{C}}_2{\mathrm{H}}_2$

   

• ${\mathrm{C}}_4{\mathrm{H}}_{10}$

   

• ${\mathrm{C}}_2{\mathrm{H}}_4$

   

Q 12 :

In the reaction with HCl, an alkene reacts in accordance with the Markovnikov’s rule to give a product 1-chloro-1-methyl-cyclohexane. The possible alkene is           [2015]

• 

   

• 

   

• (A) and (B)

   

• 

   

Q 13 :

Which of the following is not the product of dehydration of  ?               [2015]