Question
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Diastereomers are achiral molecules have superposable mirror images.
Reason (R) : Diastereomers are compounds have different physical properties.
In the light of the above statements, choose the most appropriate answer from the options given below :
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
(A) is not correct but (R) is correct
Diastereomers Assertion and Reason Analysis
Assertion (A) Evaluation
Assertion (A) claims that diastereomers are achiral molecules with superposable mirror images.
- Diastereomers are stereoisomers that are not mirror images of each other.
- Achiral molecules are molecules that are identical to their mirror images (superposable).
- The assertion incorrectly links the definition of diastereomers with the properties of achiral molecules. Diastereomers are distinct compounds and are generally chiral, while having superposable mirror images is the definition of being achiral.
- Therefore, Assertion (A) is factually incorrect.
Reason (R) Evaluation
Reason (R) states that diastereomers are compounds possessing different physical properties.
- Diastereomers are stereoisomers that are not mirror images. Being non-mirror images means they are fundamentally different chemical compounds.
- Different chemical compounds, by definition, exhibit different physical properties (e.g., boiling point, melting point, solubility). This contrasts with enantiomers, which are mirror images and share identical physical properties.
- Therefore, Reason (R) is correct.
Final Conclusion
Since Assertion (A) is incorrect and Reason (R) is correct, the appropriate choice is the one that reflects this assessment.
Was this answer helpful?
Similar Questions
- The $K_a$ value of acetic acid is $1.8 \times 10^{-5}$. What would be the degree of ionization of 0.02 M acetic acid, containing 0.01 M Sodium acetate in it ?
- An electric current of 0.50A from a 12V supply is passed for 300 sec through a resistance in thermal contact with water and the water is allowed to boil under a pressure of 1.0 atm. The value of enthalpy change during the process, if 0.798 gm of water is vaporised, will be :
- The integrated rate law and half-life equation for an first order reaction would be :
The Miller indices of the shown lattice plane in a simple cubic Bravais lattice are :
The R/S configuration of C - 2 and C - 3 in the given molecule will be :
Predict the % product formation in the given reaction :
- The Carbon atom in singlet and triplet carbene is __________ and __________ - hybridized, respectively.
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The Arrhenius equation predicts that the rate constant of a reaction can be decreased by increasing the temperature or by decreasing the activation energy.
Reason (R) : Changing the temperature of a reaction mixture is easy to do, however reducing the activation energy is more challenging in a reaction.
In the light of the above statements, choose the most appropriate answer from the options given below : - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : A gas is confined by a piston at pressure 'P' and the external pressure is $P_{ex}$. If the $P_{ex}$ is measurably greater then internal pressure, then decreasing $P_{ex}$ infinitesimally will not decrease it below the pressure of the gas and will not change the direction of the process.
Reason (R) : The system is in mechanical equilibrium with its surrounding and the compression is thermodynamically reversible.
In the light of the above statements, choose the most appropriate answer from the options given below : - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Boiling point of cis isomers is higher than trans isomers.
Reason (R) : The Dipole moment of cis isomers is higher than trans isomers.
In the light of the above statements, choose the most appropriate answer from the options given below :
Important Questions from Miscellaneous
- Which of the following scheduler/schedulers is/are also called CPU scheduler ?
(A). Short Term Scheduler
(B). Long Term Scheduler
(C). Medium Term Scheduler
(D). Asymmetric Scheduler
Choose the correct answer from the options given below: - A situation where two or more processes are blocked, waiting for resources held by each other is called:
- External fragmentation occurs ________.
- Which disk scheduling algorithm looks for the track closest to the current head position?
- Which CPU scheduling algorithm prefers the process with the shortest burst time?
Need Expert Advice?
Upcoming Exams
AIIMS Recruitment
August 31, 2026
GATE
February 06, 2027
Test Series
CUET
CUET PG Psychology (HUQP20) 2026 Mock Test Series
10 Tests
763 Attempts
3.7(15)
English
More Questions from CUET PG
