CBSE Questions for Class 12 Engineering Chemistry Amines Quiz 4 - MCQExams.com

Which of the following compound is amphoteric in nature?
  • $$CH_3COOH$$
  • $$CH_3CONH_2$$
Which of the following is more basic than aniline ?
  • Diphenylamine
  • Triphenylamine
  • p-nitroaniline
  • Benzylamine
The strongest base among the following is :
  • $$ C_6 H_5 NH_2 $$
  • $$ (C_6 H_5 )_2 NH $$
  • $$ NH_3 $$
  • $$ (C_2 H_5)_2 NH $$
Compare boiling point of isomeric alkyl amines.
  • $${ 1 }^{ o }>{ 2 }^{ o }>{ 3 }^{ o }$$
  • $${ 1 }^{ o }>{ 2 }^{ o }<{ 3 }^{ o }$$
  • $${ 1 }^{ o }<{ 2 }^{ o }<{ 3 }^{ o }$$
  • $${ 1 }^{ o }<{ 2 }^{ o }>{ 3 }^{ o }$$
$$C_3H_9N$$ reacts with Hinsberg reagent and the product is insoluble in alkali but soluble in ether. This nitrogen containing compound is:
  • primary amine
  • secondary amine
  • tertiary compound
  • nitrite compound
In case of substituted aniline the group which decreases the basic strength is :
  • $$- OCH_3$$
  • $$-CH_3$$
  • $$-NH_2$$
  • $$-C_6H_5$$
$$P$$ is
692350_ba3cd1f635df432289a16b832fbbcb3e.png
  • None of these
Which compound is more basic ?
  • all of them are equally basic
The basic character of amines is due to:
  • tetrahedral structure
  • presence of nitrogen atom
  • lone pair of electrons on nitrogen atom
  • high electronegativity of nitrogen
When ammonium cyanate is heated for  a long time, the product is:
  • Nitrous oxide
  • Ammonium cyanide
  • Nitrogen and water
  • Biuret
Choose the false statement.
  • $$-NH_2$$ is strongly activating while $$-NHCOCH_3$$ is activating
  • $$-NO_2$$ is strongly deactivating while $$-CHO$$ is deactivating
  • $$-NH\underset{\underset{\displaystyle O}{||}}{C}R$$ and $$-CH=O$$ are m-directing
  • $$-CF_3$$ and $$-\underset{\underset{\displaystyle O}{||}}{C}R$$ are m-directing
Compound $$C$$ in the above reaction is:
764266_e7e29a8400d841ac977e891a49e07095.png

Which nitrogen is maximum basic?
711484_a224f648063b491ba58434568568f8a3.png
  • $$1$$
  • $$2$$
  • $$3$$
  • All are equally basic
Half-life period of a radioactive element is 100 yr. How long will it take for its 93.75% decay ?
  • 400 yrs
  • 300 yrs
  • 200 yrs
  • 193 yrs
What is the molarity of 0.2 N Na2 CO3 solution ?
  • 0.1M
  • 0M
  • 0.4M
  • 0.2M
In the above reaction, the product $$B$$ is:
789508_2dcb642d4d8c4bac9dbd93d7a480baad.png
  • none of the above
Which of following statements is/are the not correct?
765638_b0bd7e86a01645c181069ca64cc39de6.png
  • $$II$$ is more soluble than $$I$$ in $${H}_{2}O$$
  • $$II$$ is more soluble than $$III$$ in $${H}_{2}O$$
  • $$II$$ is less soluble than $$III$$ in $${H}_{2}O$$
  • $$III$$ is more soluble than $$I$$ in $${H}_{2}O$$
What is the name for red azo dye?
  • p-hydroxy azo benzene
  • $$\beta$$- nathyl azo benzene
  • p-amino azo benzene
  • p- N, N dimethyl amino azo benzene
The correct statement among the following is:
  • boiling point of amine is more than that of alcohol of nearly same molecular mass
  • the solubility of amines in water increases with increase in molecular mass
  • the order of boiling point of isomeric amines is primary > secondary > tertiary
  • none of these
A definite amount of solid $${ NH }_{ 4 }HS$$ is placed in a flask already containing ammonia gas at a certain temperature and $$0.50atm$$ pressure. $${ NH }_{ 4 }HS$$ decomposes to give $${ NH }_{ 4 }HS$$ decomposes to give $${ NH }_{ 3 }$$ and $${ H }_{ 2 }S$$ and at equilibrium total pressure in flask is $$0.84atm$$. The equilibrium constant for the reaction is:
  • $$0.30$$
  • $$0.18$$
  • $$0.17$$
  • $$0.11$$
The following sequence of reaction on $$"A"$$ gives.
827143_89ecc8f0b9b543edae1ae694f48f346b.jpg
The correct order of basic strength of the following compounds is :
878847_35afdff73dfb42e9b07a9927ecbc6970.png
  • 2 > 1 > 3 > 4
  • 1 > 3 > 2 > 4
  • 3 > 1 > 2 > 4
  • 1 > 2 > 3 > 4
The correct order of increasing basicity of the given conjugate bases (R = $$CH_{3}$$) is:
  • $$RCO\bar{O} < HC \equiv \bar{C} < \bar{R} < \bar{N}H_{2}$$
  • $$\bar{R} < HC \equiv \bar{C} < RCO\bar{O} < \bar{N}H_{2}$$
  • $$RCO\bar{O} < NH_{2} < HC \equiv \bar{C} < \bar{R}$$
  • $$RCO\bar{O} < HC \equiv \bar{C} < \bar{N}H_{2} < \bar{R}$$
What is the correct order of basicity values of the following compounds?
  • $$NH_3\,>\,CH_3NH_2\,>\,CH_2\,=\,CH-NH_2\,>\,NH_2-CH_2-CH_2-N^+R_3$$
  • None
What would be the product for the following reaction ?

877087_a24ff8b0849f4c7f906a1010c0d3e869.png
  • Ph-Cl
  • $$Ph-N_2$$
The correct order of basicity of the following compounds is?
$$\underset {(3)}{(CH_{3})_{4}NH}$$
$$\underset {(4)}{CH_{3}CONH_{2}}$$

877302_069d76a8d12e4a0d8bd77673a817b0a3.jpg
  • $$2 > 1 > 3 > 4$$
  • $$1 > 3 > 2 > 4$$
  • $$3 > 1 > 2 > 4$$
  • $$1 > 2 > 3 > 4$$
Which of the following is not a primary amine?
  • tert - Butylamine
  • sec - Butylamine
  • Isobutylamine
  • Dimethylamine
Secondary amines can be prepared by:
  • reduction of nitro compounds
  • reduction of amides
  • reduction of isonitriles
  • reduction of nitriles
$$C_3H_9N$$ cannot represent:
  • $$1^o$$ amine
  • $$2^o$$ amine
  • $$3^o$$ amine
  • quaternary ammonium salt
Among the following which statement (s) is/are correct?
880855_b803f1e57cb64df3b861b96144b32632.png
  • Both N of pyrimidine are same basic strength.
  • In imidazole protonation take places on N-3.
  • In purine only one lone pair of N is delocalized.
  • Pyrimidine, imidazole and purine all are aromatic.
Which one of the following is aromatic amine?
  • Both $$A$$ and $$B$$
Identify $$X,\ Y$$ and $$Z$$ in the given reaction.
$$CH_2 \, =\, CH_2 \xrightarrow [CCl_4]{Br_2} \,X\, \xrightarrow[(2 \, moles)]{NaCN} \, Y \, \xrightarrow {LiAlH_4} \, Z$$
  • $$X \,=\, CH_2BrCH_2Br \, ,\, Y \, =\, CH_3CH_2CH_2CN$$
  • $$X \, =\, CH_2BrCH_2Br \, , \, Y \, =\, CH_3CH_2CN$$
  • $$X\, =\, CH_3CH_2Br \, ,\, Y\, = \, CH_3CH_2CN$$
  • $$X \, =\, CH_2BrCH_2Br \, ,\, Y \,=\, NCCH_2CH_2CN$$
Tertiary amines have lowest boiling points amongst isomeric amines because:
  • they have highest molecular mass
  • they do not form hydrogen bonds
  • they are more polar in nature
  • they are most basic in nature
Which of the following explode on heating?
  • Azides
  • Sulphates
  • Chlorides
  • Phosphides
Gabriel phthalimide reaction is used for the preparation of __________ amines.
  • primary aromatic
  • secondary
  • primary aliphatic
  • tertiary
The correct order of boiling points of the following isomeric amines is:
$$C_4H_9NH_2,(C_2H_5)_2NH,\, C_2H_5N(CH_3)_2$$
  • $$C_2H_5N(CH_3)_2 \, >\, (C_2H_5)_2NH \, >\, C_4H_9NH_2$$
  • $$(C_2H_5)_2NH\, >\, C_2H_5N(CH_3)_2 \,>\, C_4H_9NH_2$$
  • $$C_4H_9NH_2 \, >\, (C_2H_5)_2NH \, >\, C_2H_5N(CH_3)_2$$
  • $$(C_2H_5)_2 NH \, >\, C_4H_9NH_2 \, >\, C_2H_5N(CH_3)_2$$
Which of the following Diazonium salt is stable at room temperature?
Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride?
  • Aniline
  • Phenol
  • Anisole
  • Nitrobenzene
Which of the following is the weakest Bronsted base?
  • $$CH_3NH_2$$
The correct decreasing order of basic strength of the following species is:
$$H_2O, \,  NH_3, \, OH^-, \, NH_2^-$$
  • $$NH_2^- \, > \, OH^- \,>\, NH_3 \, > \, H_2O$$
  • $$OH^- \, >\, NH_2^- \,> \, H_2O \, > \, NH_3$$
  • $$NH_3 \, > \, H_2O \, > \, NH_2^- \,> \, OH^-$$
  • $$H_2O \, >\, NH_3 \, > \, OH^- \, > \, NH_2^-$$
Correct energy profile for amine inversion and hybridization of nitrogen in transition state is:
988124_29c242d2ba6b478d845c084b73cbbcd4.png
In order to prepare a 1 amine from an alkyl halide with simultaneous addition of one $$CH_2$$ group in the carbon chain, the reagent used as source of nitrogen is:
  • Sodium amide $$NaNH_2$$
  • Sodium azide $$NaN_3$$
  • Potassium cyanide $$KCN$$
  • Potassium phthalimide $$C_6H_4(CO)_2N^-K^+$$
Basic strength of different alkyl amines depends upon:
  • $$+I$$ effect
  • steric effect
  • solvation effect
  • all of these
Which of the following has highest $$pK_b$$ value?
  • $$(CH_3)_3CNH_2$$
  • $$NH_3$$
  • $$(CH_3)_2NH$$
  • $$CH_3NH_2$$
Among the following amines, the strongest Bronsted base is:
  • $$NH_3$$
The correct increasing order of basic strength for the following compounds is:
939575_07ca999fe4bb4378b4c3e63f1ac1281a.png
  • II < III < I
  • III < I < II
  • III < II < I
  • II < I < III
Which of the following cyclic amine has lowest $$\Delta G $$ for inversion?
Which (isomeric) amine has lowest boiling point?
  • $$1^o$$ amine
  • $$2^$$ amine
  • $$3^o$$ amine
  • cannot predict
In sets a - d, only one of the set is incorrect regarding basic strength. Select it:
Its basic strength is $$10^{10}$$ more than 1-dimethyl amino naphthalene due to:
989235_a8ddf89c55f7408d865c5f9b6986c7b6.PNG
  • resonance
  • steric inhibitation of resonance
  • ortho effect
  • hyperconjugation
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