NEET organic chemistry Online Test

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
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
Amongst the following the most basic compounds is:
Benzylamine
Aniline
Acetanilide
p-Nitroaniline
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
Butanonitrile may be prepared by heating:
Propyl alcohol with KCN
Butyl alcohol with KCN
Butyl chloride with KCN
Propyl chloride with KCN
The products of reaction of alcoholic silver nitrite with ethyl bromide are
ethane
ethene
nitroethane
Ethyl alcohol
Ethyl nitrite
Both 3 and 5
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
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.
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
p-Chloroaniline and anilinium hydrochloride can be distinguished by
Sandmeyer reaction
NaHCO3
AgNO3
Carbylamine 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
The compound which on reaction with aqueous nitrous acid at low temperature produces an oily nitrosamine is
Methylamine
Ethylamine
Diethylamine
Trichylamine
Acetamide is treated separately with the following reagents. Which one of these would give methylamine?
PCI5
NaOH+ Br2
soda line
hot conc. H2SO4
3 mol of mixture of ethene and ethane are decolourised by 2 mol of Br2. Percentage of ethene in the mixture is:
50.00%
66.66%
33.00%
25.00%
RCOOH decomposes NaHCO3 giving CO2. Source of CO2 is:
RCOOH
NaHCO3
Both of these
None of these
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Discussion

Paragdeshmukh@1582Gmail.Com

Chapter 1

292 days 13 hours 16 minutes ago

Paragdeshmukh@1582Gmail.Com

Chapter 1

292 days 13 hours 16 minutes ago

DIPANKAR DAS
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