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NEET Chemistry MCQ
Compounds Containing Nitrogen Mcq Neet Chemistry
Quiz 3
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Q.1
Alkanamide, which on Hofmann's reaction gives 1-phenylethylamine, is [ Roorkee 1994]
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a) 2-phenylpropanamide
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b) 3-phenylpropanamide
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c) 2-phenylethanamide
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d) N-phenylethanamide
Explanation
Answer : (a)
Q.2
Which one of the following does not have sp2 hybridized carbon? [ AIEEE 2004]
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a) Acetone
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b) Acetic acid
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c) Acetonitrile
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d) Acetamide
Explanation
Answer : (c)
Q.3
ion Q62) The correct oder of basicities of the following compounds isCH3CH2-NH2 (CH3)2NH
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a) 2 > 1 > 3 > 4
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b) 1 > 2 > 3 > 4
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c) 3 > 2 > 1 > 4
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d) 3 > 1 > 2 > 4
Explanation
Answer : (c)
Q.4
Reaction of cyclohexanone with dimethylamine in the presence of cataltic amount of an acid forms a compound if water during the reaction is continously removed. The compound is generally known as ... ... [ AIEEE 2005]
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a) A Schiff's base
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b) An enamine
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c) An imine
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d) An amine
Explanation
Answer : (b)
Q.5
A primary amine heated with CS2 in presence of excess of HgCl2 gives isothiocyanate. The reaction is called
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a) Hoffmann elimination reaction
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b)Perkin condensation
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c) Hoffmann mustard oil reaction
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d) Hoffmann bromamide reaction
Explanation
Answer : (c)
Q.6
Acetamide and ethyl amine can be distinguished by reacting with
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a) Aqueous HCl and Heat
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b) Acidified NaOH and Heat
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c) Aqueous NaOH and heat
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d) Bromine water
Explanation
Ethyl amine do not react with NaOH while Acetamide react with NaOH to give amonia gas Answer : (c)
Q.7
ion Q67) What is Y isn following equation
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a) Acetanilide
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b) Benzanilide
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c) Azobenzene
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d) Hydrazobenzene
Explanation
Answer : (b)
Q.8
than one correct answers Q68) In the reaction 2X + B2H6 → [BH2(X)2]+ [ BH4]- the amine(s) X is (are) .... .. [ IIT 2009]
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a) NH3
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b) CH3NH2
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c) (CH3)2NH
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d) (CH3)3N
Explanation
Answer : (a,b,c)
Q.9
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains ... ..[ AIEEE 2008]
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a) Mixture of o- and m-bromotoluenes
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b) Mixture of o- and p-bromotoluenes
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c) Mixture of o- and p-dibromobenzenes
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d) Mixture of o- and p-bromoanilines
Explanation
Answer : (b)
Q.10
The pri. sec. and ter. amines can be distinguished by ... [ Roorkee 1991]
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a) Hinsberg's reagent
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b) Grignard reagent
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c) Fehling's solution
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d) Tollens reagent
Explanation
Hisenber reagent C6H5SO2Cl reacts with primary amines and gives alkali soluble benzene sulphoamide; with secondary amine it gives alkali insoluble benzene sulphonamide, with tertiary amines it does not react Answer : (a)
Q.11
ion Q71) Identify end product in the reaction given below
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a)
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b)
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c)
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d)
Explanation
Answer : (d)
Q.12
Which of the following is not an explosive?
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a) Dynamite
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b) Trinitrotoluene
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c) Nitroglycerine
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d) o-Aminotoluene
Explanation
Answer : (d)
Q.13
Which has higest pKb value? ... [ DCE 2006]
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a) R3C - NH2
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b) R2NH
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c) RNH2
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d) NH3
Explanation
Higher the basicity, higher is the Kb value and lower is the pKb value. Here NH3 is the weakest base, hence it has highest pKb value Answer : (d)
Q.14
Gabriels phtalimide reaction is used to prepare
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a) p-amine
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b) s-amine
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c) t-amine
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d) all of these
Explanation
Answer : (a)
Q.15
A primary amine can be distinguished from secondary and tertiary amines by
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a) Reaction with acetyl chloride
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b) Reaction with methyl iodide
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c) Carbylamine reaction
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d) None of the above reactions
Explanation
Carbylamine reaction is a characteristic reaction of primay amines R-NH2 + CHCl3 + 3KOH → R-NC + 3KCl + 3H2O Answer : (c)
Q.16
Which of the following reactions does not yield an amine?
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a) R - X + NH3
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b)
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c)
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d)
Explanation
Answer : (c)
Q.17
In the chemical reaction CH3CH2NH2 + CHCl3 + 3KOH → (A) + (B) + 3H2O the compound (A) and (B) are respectively ... ..[ AIEEE 2007]
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a) C2H5NC and 3KCl
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b) C2H5CN and 3KCl
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c) CH3CH2CONH2 and 3KCl
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d) C2H5NC and K2CO3
Explanation
Given reation is carbylamine reaction Answer : (a)
Q.18
Assertion: Acylation of aniline increases the reactivity of C6H6 ring Reason: Acylation of aniline decreases the eleectron density at C6H6 ring
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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
- NHCOCH3 has lesser activating nature than -NH2 Answer : (d)
Q.19
Allyl isocyanide contains .... and .... bonds [ IIT 1995]
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a) 9σ, 3π
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b) 9σ, 9π
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c) 3σ, 4π
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d) 5σ, 7π
Explanation
Answer : (a)
Q.20
Hinsberg's method to separate amines is based on the use of
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a) benzene sulphonyl chloride
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b) benzene sulphonic acid
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c) ethyl oxalate
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d) acetyl chloride
Explanation
Answer : (a)
Q.21
An organic compound (A) on reduction gives compound (B) , (B) on treatment with CHCl3 and alcoholic KOH gives (c). (C) on catalytic reduction gives N-methylaniline. The compound (A) is
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a) Nitrobenzene
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b) Nitromethane
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c) Aniline
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d) Methyl amine
Explanation
Answer : (a)
Q.22
Tertiary nitro compounds do not tautomerise because
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a) There is no double bond
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b) There is no α-hydrogen
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c) Oxygen is more electronegative than hydrogen
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d) All of the avove
Explanation
Tertiary nitro compounds do not have any α-hydrogen atom hence does not exhibit tautomerism Answer : (b)
Q.23
Carbonyl chloride reacts with ammonia to form
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a) NH2CONH2
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b) CH3COCNH2
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c) CO2
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d) CH3COONH4
Explanation
Answer : (a)
Q.24
he reaction by which a primary amine is formed from a primary amide is called
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a) Hofmann bromamide reaction
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b) Gabriel phthalimide reaction
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c) Carbylamine reaction
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d) Liebermann nitrosoamine reaction
Explanation
Preparation of primary amine from primary amide is called Hofmann bromamide reaction Answer : (a)
Q.25
A secondary amine is ... ... [ KCET 1992]
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a) a compound with two -NH2 groups
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b) a compound with 2 carbon atoms and a -NH2 group
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c) a compound with a -NH2 group on the carbon atom in number 2 position
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d) a compound in which 2 of the hydrogens of NH3 have been replaced by alkyl or aryl groups
Explanation
Answer : (d)
Q.26
Benzoyl chloride does not react with
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a) primary or secondary amines
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b) aliphatic compounds
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c) aromatic compounds
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d) carboxylic acids
Explanation
Answer : (d)
Q.27
Which amine amongest the following will positively answer the carbylamine test ( i.e. heating with CHCl3 and KOH)?
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a) C6H5-N(C2H5)2
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b) C6H5 -NH - C4H9
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c) C6H5-NH-CH3
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d) CH3 - C6H4-NH2
Explanation
Answer : (d)
Q.28
Phenol on treatment with dil. HNO3 at room temperature gives
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a)
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b)
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c)
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d)
Explanation
Phenol reacts with dinlute nitric acid to produce 2-nitrophenol and 4-nitrophenol Answer : (b)
Q.29
Which one of the following will be most basic?
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a) Benzylamine
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b) p-Methoxyaniline
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c) p-Methylaniline
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d) p-Nitroaniline
Explanation
In benzyamine ( arylalkyl amines) lone pair of nitrogen atom is not conjugated with benzene ring, hence available for donation hence is basic While remaining three option are arylamines lone pair of nitrogen atom is conjugated with benzene ring, hence less eaily available for donation hence less basic Answer : (a)
Q.30
hich of the following statement is not correct?
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a) Methyl amine is more basic than NH3
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b) Ethyl amine has higher boiling point than propane
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c) Dimethyl amine is less basic than methyl amine
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d) Amines form hydrogen bonds
Explanation
Dimethyl amine is more basic than methyl amine Answer : (c)
0 h : 0 m : 1 s
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