Chemistry
Assertion (A): The members of a homologous series can be prepared by using the same general method.
Reason (R): The members of a homologous series have the same physical properties.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Organic Chemistry
3 Likes
Answer
A is true but R is false.
Explanation— All the members of a homologous series can be prepared by using the same general method of preparation. For example: Alcohols are prepared by alkyl halides. Hence, the assertion (A) is true.
However, the physical properties of the members are not identical; they change progressively with increasing molecular mass. For instance, melting points and boiling points rise steadily as the number of carbon atoms increases. Hence, the reason (R) is false.
Answered By
3 Likes
Related Questions
Assertion (A): Carbon shows catenation.
Reason (R): Catenation is the property of self linking by covalent bonds.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Alkynes show addition reactions.
Reason (R): Alkanes show substitution reactions.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): The brown colour of bromine fades when it is added to ethylene.
Reason (R): Ethylene shows substitution reactions.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Acetylene burns with a sooty flame.
Reason (R): Acetylene contains a greater carbon content.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.