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The following question consists of two statements - Assertion (A) and Reason
(R). Answer the question selecting the appropriate option given below.
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a) Both A and R are true and R is the correct explanation for A.
b) Both A and R are true but Ris not the correct explanation for A.
c) A is true but R is false.
d) A is false but R is true.
Assertion (A): Alkanes give addition reaction.
Reason (R) : Addition reactions are a characteristic property of unsaturated
hydrocarbons.
Answers
The correct answer is option d: A is false but R is true.
Alkenes and alkynes (unsaturated hydrocarbons) have weak pi-bonds, whereas alkanes are already strongly bonded with σ- bonds.
The unsaturated hydrocarbons need to go through addition reactions to strengthen their -bonds and increase their stability.
Alkenes and alkynes are unsaturated because they have pi-bonds, which prevent them from having as much hydrogen as they could.
As a result of their weaker pi-bonds than the bonds present in the alkanes, they are more unstable than alkanes.
Alkenes and alkynes go through addition reactions because they want to create more strong bonds and have a structure that resembles an alkane.
Alkanes can only change things around in substitution reactions since they already have a strong bond and cannot undergo an addition reaction because they are already at the height of their structural stability.
Unsaturated hydrocarbons contain multiple bonds between the two C− atoms and show addition reactions like the decoloration of bromine water that is not shown by alkanes.
They also undergo many other chemical reactions that alkanes do not show. The double bond in alkenes makes them more reactive than alkanes.
To learn more about unsaturated hydrocarbons, refer: brainly.in/question/7360864
https://brainly.in/question/6958360
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