JEE MAINS ORGANIC Online Test

An ester group is subjected to hydrolysis. Products of hydrolysis will be tested for:
Carboxylic and aldehydic groups
Carboxylic and ketonic groups
Aldehydic and ketonic groups
Carboxylic and alcoholic groups
Test tube A contains CH3COCH3 and test tube B constains CH3CHO. One test is allowed to make distinction between them. Best way is:
Idoform test
Azo dye test
CAN test
Tollen’s test
Detection of elements in organic compound is done using sodium-fusion method which is called:
Middleton’s fusion method
Lassaigne fusion method
Hofmann’s method
Hinsberg’s method
Instead of sodium, one can also use following in the detection of elements in organic compounds:
NaHCO3
NaCO3/Zn
NaHCO3/Zn
CaCO3
To sodium fusion extract CI2 water and CCI4 were added and shaken well. There is violet colour in the lower part (organic layer) This indicates presence of:
bromine
Iodine and bromine
Chlorine
Iodine
Read the following statement and explanation and answer as per the options given below: Assertion: In strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents. Reason: The amino group being completely protonated in strongly acidic solution, the lone pair of electrons on the nitrogen is no longer available for resonance.
If both assertion and reason are CORRECT, and reason is the CORRECT explanation of the assertion
If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion
If assertion is CORRECT but reason is INCORRECT
If assertion is INCORRECT but reason is CORRECT
Compound ‘A’ (molecular formula C3H8O) is treated with acidified potassium dichromate to form a product ‘B’ (molecular formula C3H6O). ‘B’ forms a shining silver mirror on warming with ammonical silver nitrate. ‘B’ when treated with an aqueous solution of H2NCNHNH2CHI and sodium acetate gives product ‘C’. Identify the structure of ‘C’.
CH3CH2CH=NNHCONH2
CH3(C=NNHCONH-2 ( CH3
CH3(C=NCONHNH-2 ( CH3
CH3CH2CH=NCONHNH2
Benzamide on reaction with POCI3 gives
aniline
Chlorobenzene
Benzylamine
Benzenitrile
When nitrobenzene is treated with Br2 in presence of FeBr3, the major product formed is m-bromonitrbenzene. Statements which are related to obtain the m-isomer are
The electron density on meta carbon is more than that on ortho and para positions
The intermediate carbonium ion ion formed after initial attack of Br2+ at the meta position is least destabilized
Loss of aromoaticity when Br+ attacks at the ortho and para postities and not at meta position
Easier loss of H+ to regain aromaticity from the meta position than ortho and para positions
Both 1 and 4
Both 2 and 3
Among the following compounds, which will react with acetone to give a product containing>C=N-bond?
C6H5NH2
(CH3)3N
C6H5NHC6H5
C6H5NHNH2
Both 1 and 4
Both 2 and 3
Benzenediazonium chloride on reaction with phenol in weakly basic medium gives
Diphenyl ether
p-hydroxyazobenzene
Chlororbenzene
Benzene
Read the following statement and explanation and answer as per the options given below: Assertion: p-Nitrophenol is a stronger acid that o-nitrophenol. Statement: Intermolecular hydrogen makes the o-isomer weaker than the p-isomer.
If both assertion and statement are correct and statement is an explanation of assertion
If assertion is correct and statement is wrong statement is not an explanation of assertion
If assertion is wrong and statement is correct statement is not an explanation of assertion
If both assertion and statement are wrong and statement is not explanation of assertion
Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4. In the nitrating mixture, HNO3 acts as a
base
acid
Reducing agent
catalyst
Read the following statements and explanation and answer as per the options given below: Assertion: Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide. Reason: Cyanide (CN) is a strong nucleophile.
If both assertion and reason are correct, and reason is the correct explanation of the assertion
If both assertion and reason are correct, but reason is not the correct explanation of the assertion
If assertion is correct but reason is incorrect
If assertion is incorrect but reason is correct.
Acetamide is treated separately with the following reagents. Which one of these would give methylamine?
PCI5
NaOH+ Br2
soda line
hot conc. H2SO4
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Discussion

Aman Upadhyay

found it a little difficult and factual questions 3 to 4

2375 days 18 hours 58 minutes ago

DIPANKAR DAS
Experienced chemistry teacher for JEE(M &A) , WBJEE, NEET,ALL BOARDS
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