In which part of the atmosphere, does the freon remain unchanged?
Stratosphere
Troposphere
Mesosphere
Thermosphere
Addition of which of the following reagents to alkene is stereospecific:
I.Br2 II. KMnO4
III. BH3 THF/H2O2.NaOH
Select the correct reagent:
Both I and II
Both II and III
Both I and III
I, II and III
Which of the following is the correct increasing order of stability of free radicals.
(CH3)2CH0 < (CH3)2CH0 < (C6H5)20CH < (C6H5)3C0
(CH3)2CH0 < (CH3)2C0 < (C6H5)30C < (C6H5)2C0
(C6H5)30C < (C6H5)20CH < (CH3)30C < (CH3)20CH
(C6H5)20CH < (C6H5)2C0 < (CH3)30C < (CH3)20CH
C.
(C6H5)30C < (C6H5)20CH < (CH3)30C < (CH3)20CH
The correct order of the given free radicals stability will be:
The number of enantiomers and mesa forms for the compound ,
HOOC-CH(CH3)-CHOH-CHBr-CHOHCH(CH3)-COOH are respectively:
12 , 2
12 , 4
8 , 4
8 , 2
Which of the following yields as a major product is mono chlorination of ethyl benzene in the presence of light and heat.
m- chlorotoluene
a mixture of -O- and p-chlorotoluene
1-chloro-2- phenylethane
1-chloro -1- phenyl ethane
The correct IUPAC name of
is:4-methyoxy -2- nitrobenzaldehyde
4-formyl -3- nitro anisole
4- methoxy -6- nitrobenzaldehyde
2-formyl -5- methoxy nitrobenzene
An unknown silver salt of monoacidic alkyne contains 67.08% silver. The structure of the alkyne is:
In which of the following structure the number of shared O-atom per tetrahedrom is two and half?
Pyroxene chain silicate
Amphibole chain silicate
Cyclic silicate
Sheet silicate
Which of the following statement is not true about homolytic cleavage?
In homolytic cleavage the movement of a single electron takes place instead of an electron pair.
The organic reaction which proceed through homolytic bond cleavage are called ionic reactions or polar reactions
Homolytic cleavage results in the formation of neutral species which contains an unpaired electrons
None of the above
Hydrolysis of (CH3)2SiCl2 and CH3SiCl3 leads to:
linear chain and cross linked silicones respectively
cross linked and linear chain silicones respectively
linear chain silicones only
cross linked silicones only