The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
A
chromatography
B
crystallisation
C
steam distillation
D
sublimation.
Explanation
Steam distillation is the most suitable method
of separation of 1 : 1 mixture of ortho and para
nitrophenols as there is intramolecular hydrogen
bonding in o-nitrophenol.
2
NEET 2017
MCQ (Single Correct Answer)
The correct statement regarding electrophile is
A
electrophile is a negatively charged species and form a bond by accepting a pair of electrons from another electrophile
B
electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
C
electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
D
electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile.
Explanation
Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of
electrons from a nucleophile.
3
NEET 2017
MCQ (Single Correct Answer)
The IUPAC name of the compound
A
5-formylhex-2-en-3-one
B
5-methyl-4-oxohex-2-en-5-al
C
3-keto-2-methylhex-5-enal
D
3-keto-2-methylhex-4-enal
Explanation
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
For the following reactions :
(A) CH3CH2CH2Br + KOH $$ \to $$
CH3CH $$=$$ CH2 + KBr + H2O
Which of the following statements is correct?
A
(A) is elimination, (B) and (C) are substitution reactions.
B
(A) is substitution, (B) and (C) are addition reactions.
C
(A) and (B) are elimination reactions and (C) is addition reaction.
D
(A) is elimination, (B) is substitution and (C) is addition reaction.
Explanation
(A) Saturated compound is converted into unsaturated
compound by removal of group of atoms hence, it
is an elimination reaction.
(B) —Br group is replaced by —OH group hence, it is a
substitution reaction.
(C) Addition of Br2 converts an unsaturated compound
into a saturated compound hence, it is an addition
reaction.
Questions Asked from Some Basic Concepts of Organic Chemistry
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
