Multiple Choice QuestionsAfter adding non-volatile solute freezing point of water decreases to -0.186C. Calculate ΔTb if Kf = 1.86 K kg mol-1 and Kb =0.521 K kg mol-1.
0.521
0.0521
1.86
0.0186
In the given set of reactions, . The IUPC name of product Y is
N-methylpropanamine
N-isopropylmethanamine
Butan-2-amine
N-methylpropan-2-amine
The hydrolysis of optically active 2-bromobutane with aqueous NaOH result in the formation of
(+) butan -2-ol
(-) butan-2-ol
(±) butan-1-ol
(±) butan-2-ol
D.
(±) butan-2-ol
In case of organic reactions, to differentiate between first order and second order kinetics, you should check the stability of carbocation. If carbocation is stable, then it will follow first order kinetics otherwise second order kinetics Since,2°- carbocation is stable so given reaction follows first order kinetics.
Usually 1° carbocatlon follows second order kinetics and 2° or 3° carbocation follows first order kinetics.The reaction between 2-bromobutane with aqueous NaOH follows first order kinetics, i.e the rate of the reaction depends upon the concentration of 2- bromobutane (SN1 mechanism).
Smee, the 2-bromobutane is optically active than the product is a racemic mixture. This is because carbocations are as intermediates in SN1 reactions Smee, carbocation being sp2 -hybridised is planar (achiral) species, the attack of the nucleophle on it can occur from both the faces (front and rear) with almost equal case giving a 50-50 mxture of two enantiomers. So, 2 bromobutane gives racemic of(±)butan-2-ol
The distinguishing test between methanoic acid and ethanoic acid is
litmus test
Tollen's test
esterficiation test
sodium bicarbonate test
Glycogen is
a polymer of β-D-glucose units
a structural polysaccharide
structurally very much similar to amylopectin
structurally similar to amylopectin but extensively branched
The formation of cyanohydrins from a ketone is an example of
nucleophilic substitution
nucleophilic addition
electrophilic addition
electrophilic substitution
Switch
. The product B is
