MCQ
Assertion (A): Ozonolysis of alkynes are faster than ozonolysis of alkenes.
Reason (R): Reaction proceed by cyclic transition state are faster on alkynes.
  • Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer

Correct option: A.
Both A and R are true and R is the correct explanation of A.
(a) Both A and R are true and R is the correct explanation of A .
Explanation: Both A and R are true and R is the correct explanation of A .

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

Assertion $(A)$ : Liquids tend to have maximum number of molecules at their surface.
Reason $(R)$ : Small liquid drops have spherical shape.
Assertion (A): Fluoride has the lowest and iodide has the highest boiling point.
Reason (R): Boiling points of haloalkanes increases with increasing atomic mass.
Note : In the following questions a statement of Assertion $(A)$ followed by a statement of reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : Boron has a smaller first ionisation enthalpy than beryllium.
Reason $(R)$ : The penetration of a $2s$ electron to the nucleus is more than the $2p$ electron hence $2p$ electron is more shielded by the inner core of electrons than the $2s$ electrons.
Notes : In the following questions a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : Spontaneous process is an irreversible process and may be reversed by some external agency.
Reason $(R)$ : Decrease in enthalpy is a contributory factor for spontaneity.
Image
Assertion (A): Both cyclopropane and propene give addition reactions readily.
Reason (R): Cyclopropane and propene are isomers of each other.
Note : In the following question a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below question.
Assertion $(A)$ : Beryllium carbonate is kept in the atmosphere of carbon dioxide.
Reason $(R)$ : Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.
Notes : In the following questions a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : A liquid crystallises into a solid and is accompanied by decrease in entropy.
Reason $(R)$ : In crystals, molecules organise in an ordered manner.
Note : In the following questions a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : Pent $- 1-$ ene and pent $- 2 -$ ene are position isomers.
Reason $(R)$ : Position isomers differ in the position of functional group or a substituent.
Note : In the following questions a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : All the carbon atoms in $\ce{H_2C = C = CH_2}$ are $sp^2$ hybridised
Reason $(R)$ : In this molecule all the carbon atoms are attached to each other by double bonds.