EASY
11th CBSE
IMPORTANT
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In which of the following, functional group isomerism is not possible?

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Important Questions on Organic Chemistry – Some Basic Principles and Techniques

HARD
11th CBSE
IMPORTANT
The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is:
MEDIUM
11th CBSE
IMPORTANT
During hearing of a court case, the judge suspected that some changes in the documents had been carried out. He asked the forensic department to check the ink used at two different places. According to you which technique can give the best results?
MEDIUM
11th CBSE
IMPORTANT

What is the correct order of decreasing stability of the following cations?

I. CH3-CH-CH3

II. CH3-CH-OCH3

III. CH3-CH-CH3-OCH3

 

HARD
11th CBSE
IMPORTANT
In which of the following compounds the carbon marked with asterisk is expected to have greatest positive charge?
HARD
11th CBSE
IMPORTANT
Ionic species are stabilized by the dispersal of charge. Which of the following carboxylate ion is the most stable?
MEDIUM
11th CBSE
IMPORTANT
Electrophilic addition reactions proceed in two steps. The first step involves the addition of an electrophile. Name the type of intermediate formed in the first step of the following addition reaction.
H3CHC= CH2+ H+?