Practice free Basic Principles of Orgainc Chemistry (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
A racemic mixture is a mixture of:
(b) A mixture of 50-50% of d and its l form is called racemic mixture.
Compounds which rotate plane polarised light clockwise direction are known as:
(a) A characteristic of dextrorotatory.
Glucose and fructose are:
(c) Glucose has aldehyde group and fructose keto group. The general formula for both is C6H12O6.
Which is optically active?
(d) CH3CHClCOOH contains asymmetric carbon atom.
Which is incorrect about enantiomorphs?
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(c) CH3 has sp2-hybridized carbon.
The isomeric cis-2-butene and trans-2-butene can be distinguished on the basis of:
(d) The two butenes give different products on addition of Br2. cis butene gives racemic mixture whereas trans butene gives meso form of 2,3-dibromo butene.
How many optically active forms are possible for a compound of the formula,
CHO.CHOH.CHOH.CHOH.CH2OH?
(d) a = 2n; n=3
Isomers which can be interconverted through rotation around a single bond are:
(a) The definition of conformation.
a-D-(+)-glucose and β-D-(+)-glucose are :
α-D-(+)-glucose and β-D-(+)-glucose are anomers. Anomers are stereoisomers that differ in the configuration around a specific carbon atom, typically the anomeric carbon atom in carbohydrates. They have the same molecular formula but different spatial arrangements.
The correct statement regarding electrophile is
(d) An electrophile is defined as electron deficient species which attacks on electron rich areas. Being electron deficient, the electrophiles behaves an Lewis acids.
e.g. H+, CI+, Br+, NO2+ NO+ etc.
The electrophiles can be seen in the form of neutral molecules also e.g. :CR2, N..R,BF3 etc.
Thus, we can say that electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile.
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