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NEET Chemistry MCQ
Compounds Containing Nitrogen Mcq Neet Chemistry
Quiz 6
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Q.1
Nitrobenzene is generally used for ... [ Roorkee 1991]
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a) preparing shoe polish
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b) preparing floor polish
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c) preparing aniline
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d) all of these
Explanation
Answer : (d)
Q.2
Assertion: The boiling point of nitro-alkanes is higher than their corresponding alkyl nitrites Reason: Nitro-alkanes show strong dipole-dipole interaction
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a) both the assertion and reason are true and reason explains the assertion
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b) both the assertion and reason are true but reason does not explain the assertion.
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c) assertion is true but reason is false
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d) assertion is false but reason is true.
Explanation
Answer : (a)
Q.3
on Q155) Identify C in following reaction
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a)
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b)
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c)
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d)
Explanation
Answer : (b)
Q.4
C3H9N cannot represent
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a) 1° amine
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b) 2° amine
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c) 3° amine
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d) quaternary salt
Explanation
Answer : (d)
Q.5
The compound that will react most readily with NaOH to form methanol is ... ..[ IIT 2001 ]
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a) (CH3)4N+I-
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b) CH3OCH3
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c) (CH3)3S+I-
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d) (CH3)3CCl
Explanation
The reaction will be more sponaneous when reactant has best leaving group, i.e. I- Also methyl group with +ve N is more active due to +ve IE of CH3 group Answer : (a)
Q.6
on Q158) Predict the product
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a)
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b)
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c)
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d)
Explanation
Answer : (b)
Q.7
The reaction of aniline with acetyl chloride in presence of NaOH gives .... .. [ Roorkee 1993]
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a) acetanilide
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b) aniline hydrochloride
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c) p-chloroaniline
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d) a red dye
Explanation
C6H5NH2 + CH3COCl → C6H5NHCOCH3 Answer : (a)
Q.8
Pyridine possesses
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a) aromatic nature
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b) unsaturated aliphatic nature
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c) alicylic nature
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d) aliphatic nature
Explanation
Follow Huckel rule Answer : (a)
Q.9
Mark the correct statement
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a) Methyl amine forms salts with alkalies
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b) Methyl amine is slightly acidic
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c) Methyl amine is a stronger base than ammonia
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d) Methyl amine forms salts with alkalies
Explanation
Methyl amine is stronger base than ammonia due to electron releasing inductive effect of methyl group Answer : (c)
Q.10
han one correct answers Q162) Which of the following would react with nitrobenzene to produce hydrazobenzene?
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a) Na3AsO3 + NaOH
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b) Zn/NaOH, CH3OH
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c) Zn, NaOH
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d) NH2NH2 + alc. KON
Explanation
Answer : (a,b)
Q.11
p-chloroaniline and anilium hydrochloride can be distinguished by ... [ IIT 1998]
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a) P2O5
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b) AgNO3
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c) Carbylamine test
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d) Sandmeyer's reaction
Explanation
Anilium hydrochloride group in benzene gives white ppt. with AgNO3 Answer : (b)
Q.12
Which of the following comounds gives a secondary amine on reduction? [ JIPMER 1993]
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a) Nitromethane
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b) Nitrobenzene
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c) Methyl isocyanide
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d) Methyl cyanide
Explanation
On reduction of CH3NC → CH3NHCH3 Answer : (c)
Q.13
The ideal starting material for the synthesis of m-chloronitro benzene is ... [ Roorkee 1995]
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a) benzene
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b) chlorobenzene
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c) toluene
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d) nitrobenene
Explanation
Answer : (d)
Q.14
on Q166) Identify 'Z' in the reaction
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a)
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b)
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c)
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d)
Explanation
This is Sandmeyer's reaction Answer : (a)
Q.15
Aniline on heating with conc.HNO3+ conc.H2SO4 mixture yields
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a) o- and p- Nitroanilines
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b) m-Nitroaniline
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c) A black tarry matter
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d) No reaction
Explanation
Direct nitration of aniline yields black tarry mass due to oxidation of benzene ring. But in acidic conditions nitration of aniline yields m-nitroaniline Answer : (c)
Q.16
A positive carbylamine test is given by
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a) p-methyl benzylamine
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b) 2,4-dimethylaniline
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c) N,N-dimethylaniline
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d) N-methyl-o-methylaniline
Explanation
It is a test for primary amines. No doubt 2,4-dimethyl aniline is also primary amine but it does not give test due to steric hindrance Answer : (a)
Q.17
Which of the following reacts with NaNO2 + HCl at 273-278 K to give alcohol/phenol?
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a) C6H5NH2
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b) CH3NH2
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c) (CH3)2NH
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d) C6H5CH2NHCH3
Explanation
Aliphatic primary amines react with NaNO2 + HCl ( i.e. HNO2) to yield alcohol CH3NH2 + NJO2 → CH3OH + N2 + H2O Answer : (b)
Q.18
Assertion: In strongly acidic solution, aniline becomes more reactive towards electrophilic reagents Reason: The amino group being completely protonated n strongly acidic solution, the lone pair of electrons on the nitrogen is no longer available gor resonance
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a) both the assertion and reason are true and reason explains the assertion
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b) both the assertion and reason are true but reason does not explain the assertion.
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c) assertion is true but reason is false
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d) assertion is false but reason is true.
Explanation
Answer : (d)
Q.19
Which one of the following methods neither means for the synthesis nor for separation of amines? [ AIEEE 2005]
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a) Hinsberg's method
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b) Hofmann's method
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c) Wurtz reaction
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d) Curtius method
Explanation
Wurtz reaction is used to prepare alkenes Answer : (c)
Q.20
Assertion: Benzo nitrile is prepared by the reaction of chlorobenzene with potassium cyanide Reason: Cyanide (CN-) is strong nucleophile
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a) both the assertion and reason are true and reason explains the assertion
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b) both the assertion and reason are true but reason does not explain the assertion.
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c) assertion is true but reason is false
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d) assertion is false but reason is true.
Explanation
Chlronine is firmly attached to benzene ring due to resonance -CN can not replace Cl, although -CN is strong nucleophile than Cl Answer : (d)
Q.21
Which statement is not correct regarding aniline? [ MLNT 1993]
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a) It is less basic than ethyl amine
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b) It can be steam distilled
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c) It reacts with sodium to give hydrogen
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d) It is soluble in water
Explanation
Aniline is insoluble in water Answer : (d)
Q.22
In the dizotization of arylamines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to
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a) Ensure a stoichiometric amount of nitrous acid
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b) Neutralise the base liberated
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c) Suppress the concentration of free aniline available for coupling
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d) Suppress hydrolysis of phenol
Explanation
Excess of hydrochloric acid avoids the possibility of coupling reaction by leaving no free aniline for coupling reaction Answer : (c)
Q.23
A compound Z reacts with three moles of CH3I and gives a product which on hydrolysis gives [(CH3)4N]+OH-. Compound Z is
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a) (CH3)2NH
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b) (CH3)4N+Cl-
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c) CH3NH2
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d) (CH3)3N
Explanation
Answer : (c)
Q.24
Nitrosobenzene on further excessive nitration gives
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a) sym-Trinitrobenzene
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b) p-Dinitrobenzene
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c) m-Dinitrobenzene
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d) All of these
Explanation
Since -NO2 grop is strongly deactivating group, further nitration nitration of nitrobenzne requires fuming HNO3 and H2SO4 which results in formation of m-dinitrobenzene. Third -NO2 group can not ne introduced in the ring Answer : (c)
Q.25
Acetanilide on nitration followed by alkaline hydrolysis mainly gives
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b) p-Nitroaniline
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c) o-Nitroacetanilide
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a) 2,4,6-Trinitroaniline
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d) m-Nitroaniline
Explanation
Answer : (b)
Q.26
Among the following most basic compound is .... ..[ AIEEE 2005]
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a) benzyl amine
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b) aniline
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c) acetanilide
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d) p-nitro aniline
Explanation
Due to resonance of electron pair in aniline, nitroaniline and acetanilide, these are weaker than banezyl amine, which does not involve lone paire of N in resonance. The basic order is Benzyl amine > Aniline > Acetanilide > Nitroaniline Answer : (a)
Q.27
When acetamide is treated with NaOBr, the product formed is
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a) CH3OH
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b) CH3COBr
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c) CH3CN
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d) CH3NH2
Explanation
CH3CONH2 + NaOBr → CH3NH2 (methyl amine) Answer : (d)
Q.28
A nitrogenous substance X is treated with HNO2 and the product so formed is further treated with NaOH solution, which produces blue colouration. X can be .... [ Roorkee 1997]
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a) CH3CH2NH2
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b) CH3CH2NO2
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c) CH3CH2ONO
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d) (CH3)2CHNO2
Explanation
Pseudonitrol give blue colour on treatment with NaOH Answer : (d)
Q.29
on Q181) R-O-N=O and are .... isomers
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a) functional
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b) chain
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c) position
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d) all of these
Explanation
Answer : (a)
Q.30
on Q182) In the following chemical reaction the compound A and B respectively are ... [ AIEEE 2010]
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a) nitrobenzene and chlorobenzene
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b) nitrobenzene and fluorobenzene
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c) phenol and benzene
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d) benzenediazonium chloride and fluorobenzene
Explanation
Answer : (d)
0 h : 0 m : 1 s
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