Decarboxylation
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Q. CH3-CH(CH3)-CH2-CH3 +Cl2 hv -> Major (A) in the reaction is
1.Cl-CH2-CH(CH3)-CH2-CH3
2. CH3-CH(CH3)-CH-Cl-CH3
3. CH3-CH(CH3)-CH2-CH2-Cl
4. CH3-C(CH3)Cl-CH2-CH3
Q. 15. Why is ortho nitro benzoic acid more acidic than p nitro benzoic acid when there is a chance for hydrogen bonding of ortho nitro with cooh or ortho nitro intramolecular hydrogem bonding
Q. 8 CH2=CH-CH=CH2 + HBr---->Low temp. (X) ----->High temp. (Y) X and Y respectively are ? (1) CH3-CH=CH-CH2-Br and CH3-CHBr-CH=CH2 (2) CH3-CHBr-CH=CH2 and CH3-CH=CH-CH2-Br (3) CH3-CH=CH-CH2-Br and CH3-CH=CH-CH2-Br (4) CH3-CHBr-CH=CH2 and CH3-CHBr-CH=CH2.
Q. Ch3-ch=ch-ch2-ch3 + hbr gives in presence of h2o2 and why?
Q. 14. Assertion-: In basic medium Zn2+ is not precipitated by H2S R-:Common ion effect reduces concentration of sulphide ion to minimum level
Q. What is a limiting reagent in chemical reactions?
Q.
Which of the following is not an electrophile?
Aluminium tribromide
Boron trifluoride
Tin (IV) chloride
Ammonia
Q. Give reactions to convert benzene to 1. Hexan1, 6-dioic acid 2. Cyclopen†an one 3. Cyclopen†an e 4. Bromo cyclo pen†an e 5. Cyclopentene 6. Pentan1, 5-dioic acid 7. Cyclobu†an one 8. Cyclobuta
Q. CH3-CH(CH3)-CH2-CH3 +Cl2 hv -> Major (A) in the reaction is
1.Cl-CH2-CH(CH3)-CH2-CH3
2. CH3-CH(CH3)-CH-Cl-CH3
3. CH3-CH(CH3)-CH2-CH2-Cl
4. CH3-C(CH3)Cl-CH2-CH3
Q.
C6H5Cl
C6H6Cl6
C6H5Cl7
C6H7Cl5
Q.
CH3CH = CHCH3
CH2 = CHCH2CH3