CHEMISTRY IITJEE, WBJEE, AIPMT test-ORGANIC

Instead of sodium, one can also use following in the detection of elements in organic compounds:
NaHCO3
NaCO3/Zn
NaHCO3/Zn
CaCO3
Which of the organic compounds will give red colour in Lassaigne test?
NaCNS
S || NH2CNH2
O || NH2CNH2
H2N(
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
Which factor is most important in determining the chemistry of an organic molecule?
The melting point
The functional group
The number of branches in the carbon chain
The number of carbon-hydrogen bonds
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
Tollen’s reagent can make distinction between:
Glucose and fructose
Formaldehyde and formic acid
Glucose and benzaldehyde
Acetaldehyde and acetone
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
p-Chloroaniline and anilinium hydrochloride can be distinguished by
Sandmeyer reaction
NaHCO3
AgNO3
Carbylamine test
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
RCOOH decomposes NaHCO3 giving CO2. Source of CO2 is:
RCOOH
NaHCO3
Both of these
None of these
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
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.
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 benzenesulfonic acid and p-nitrophenol are treated with NaHCO3, the gases released respectively are
SO2, NO
SO2, NO2
CO2, CO2
SO2, CO2
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
If two compounds have the same empirical formula but different molecular formula they must have
Different percentage composition
Different molecular weight
Same viscosity
Same vapour density
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
Description:

MCQ BASED

Discussion

Meghna B

que 21 is incorrect
plz check
its ortho wch is more volatile then para b'coz ortho forms INTRA-MOLECULAR H-BOND
where as para forms inter-molecular H-Bond

4150 days 22 hours 30 minutes ago

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

Your Facebook Friends on WizIQ

More Tests By Author

NEET organic chemistry
15 Questions | 190 Attempts

JEE MAINS ORGANIC
15 Questions | 567 Attempts

TEST FOR AIEEE, WBJEE Chemistry
30 Questions | 434 Attempts