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NEET Questions / Chemistry / Organic Chemistry: Some basic principles and techniques
Which of the following statements is INCORRECT regarding the isomerism exhibited by the compound with the formula ?
It can exhibit chain isomerism.
It can exhibit position isomerism.
It can exhibit geometrical isomerism.
It can exhibit both geometrical and optical isomerism simultaneously.
A compound with the molecular formula shows optical activity but no geometrical isomerism. Which of the following could be the compound?
Hex-3-en-2-one
2,3-dimethylbut-2-enoic acid
Ethyl 2-methylpropanoate
2-hydroxy-4-methylpentanoic acid
Which of the following compounds exhibits both tautomerism and geometrical isomerism?
But-2-enal
Pent-2,4-dione
3-oxopent-2-enal
2-methylbut-2-enal
An organic compound with molecular formula exhibits optical isomerism but not geometrical isomerism. It also gives a positive iodoform test. Which of the following could be the compound?
Heptan-2-one
3-methylhex-3-en-2-one
2,4-dimethylpentan-3-one
4-methylhexan-3-one
Which of the following statements is INCORRECT regarding the mesomeric effect?
It involves the delocalization of Ο electrons or lone pairs
It operates only in conjugated systems
It can be positive (+M/+R) or negative (-M/-R)
It is a temporary effect
In which of the following compounds does the -NO2 group exert the STRONGEST -M effect?
Nitrobenzene
p-nitrotoluene
p-nitrophenol
p-nitrobenzaldehyde
Arrange the following groups in decreasing order of their -M effect: -NO2, -CN, -COOH, -COOR
-NO2 > -CN > -COOH > -COOR
-CN > -NO2 > -COOH > -COOR
-COOH > -COOR > -NO2 > -CN
-COOR > -COOH > -CN > -NO2
Which of the following carbocations is MOST stabilized by hyperconjugation?
CH3+
CH3CH2+
(CH3)2CH+
(CH3)3C+
