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1. 
2018,2017,Years,Organic Chemistry,Subject,Hard,Difficulty,CUET-PG,Chemical Science Exams
The configurations at the two stereocentres in the compound given below are:


2. 
2013,Years,Inorganic Chemistry,Subject,MSQ,Question Type,Hard,Difficulty,GATE Chemistry,Chemical Science Exams
An optically active compound enriched with R-enantiomer (60\% ee) exhibited $$ [\alpha]_D = +90^\circ $$ If the observed specific rotation of the sample is $$ [\alpha]_D = -135^\circ $$ the ratio of R and S enantiomers would be:

3. 
2011,Years,Physical Chemistry,Inorganic Chemistry,General Aptitude,Subject,Assertion-Reason,Question Type,GATE Chemistry,Chemical Science Exams
The relative rates of solvolysis of iodides A-C are

4. 
2014,Years,Organic Chemistry,Physical Chemistry,Subject,Numerical,Question Type,Difficulty,GATE Chemistry,Chemical Science Exams
**The gauche interaction values for Me/Me, Me/Br and Br/Br are 3.3, 0.8 and 3.0 kJ·mol⁻¹, respectively. Among the following Newman projections, which is the *most stable conformation* of 2,3-dibromobutane?**

5. 
2020,2015,Years,Organic Chemistry,Subject,Numerical,Question Type,Medium,Difficulty
The correct order of acidity of the compounds A – C is: