Physics-
General
Easy
Question
From the top of a tower, a stone is thrown up. It reaches the ground in 5 sec. A second stone is thrown down with the same speed and reaches the ground in 1sec. A third stone is released from rest and reaches the ground in
- 3 sec.
- 2 sec.
sec.
- 2.5 sec.
sec.
The correct answer is: sec.
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The D, L system of relative configuration is not 100% correct, and hence R, S system was adopted as a defect proof, absolute configuration. The R, S system involves the following steps:
Step I: The four atoms or groups attached to the chiral carbon atom are assigned a sequence of priorities according to sequence rules.
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Now observe the monochlorination of 2-chlorobutane.
Priority order of some groups:
Cl > CH2CH3 > CH3 > H; CH2Cl > CH2CH3, CH2CH2Cl > CH3
Which of the above structures can exit as enantiomers?
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