The substitution reaction of an alkyl halide mainly occurs by the SN1 or SN2 mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon-halogen bond is responsible for these substitution reactions. The rate of SN1 reactions is governed by the stability of the carbocation, whereas for SN2 reactions the steric factor is the deciding factor. If the starting material is a chiral compound, we may end up with an inverted product or a racemic mixture depending upon the type of mechanism followed by the alkyl halide. Cleavage of ethers with HI is also governed by the steric factor and the stability of the carbocation, which indicates that in organic chemistry these two major factors help us in deciding the kind of product formed.
Name the instrument used for measuring the angle by which plane-polarised light is rotated.
Name the instrument used for measuring the angle by which plane-polarised light is rotated.
Answer: Polarimeter.
Solution
The rotation of plane-polarised light by an optically active substance is measured with a \textbf{polarimeter}.
CBSE Class 12 Board · 2020 · Subjective