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CBSE Questions for Class 12 Medical Chemistry Organic Compounds Containing Nitrogen Quiz 1 - MCQExams.com

Which of the following is the most stable diazonium salt?
  • C6H5CH2N+2X
  • CH3N+2X
  • CH3CH2N+2X
  • C6H5N+2X
Which of the following amines yields foul smelling product with haloform and alcoholic KOH?
  • Ethylamine
  • Diethyl amine
  • Triethylamine
  • Ethyl methylamine
Which of the following is a secondary amine ?
  • Aniline
  • Diphenyl amine
  • Sec. butyl amine
  • Tert. butyl amine
Which of the following will not undergo diazotisation ?
  • m-toluidine
  • Aniline
  • p-aminophenol
  • Benzyl amine
Which of the N atoms is least basic in the given compound ?
1103633_74a7ad0018824d6a9f5e5dbcb1c90e42.png
  • a
  • b
  • c
  • d
Which of the following is the least basic?
  • All are equally basic
Which is most basic?
Which of the following compound is expected to be most basic 
  • Aniline
  • Methylamine
  • Hydroxylamine
  • Ethylamine
Which of the following is obtained by reducing methyl cyanide with Na+C2H5OH?
  • Methyl alcohol
  • Acetic acid
  • Ethyl amine
  • Methane
What is the_decreasing order of basicity of pri., sec., tert., ethyl amines and NH3?
  • NH3>C2H5NH2>(C2H5)2NH>(C2H5)3N
  • (C2H5)3N>(C2H5)2NH>C2H5NH2>NH3
  • (C2H5)2NH>C2H5NH2>NH3>(C2H5)3N>NH3
  • (C2H5)2NH>C2H5NH2>NH3>(C2H5)3N
The correct increasing order of basic strengths in,
CH3CH2CN,
CH3CH2NH2,
4CH3N=CHCH3$ is:
  • CH3N=CHCH3,CH3CH2NH2,CH3CH2CN
  • CH3CH2NH2,CH3N=CHCH3,CH3CH2CN
  • CH3CH2CN,CH3N=CHCH3,CH3CH2NH2
  • CH3CH2CN,CH3CH2NH2,CH3N=CHCH3
The boiling points of amines and their corresponding alcohols and acids vary in the order:
  • RCH2NH2>RCOOH>RCH2OH
  • RCH2NH2>RCH2OH>RCOOH
  • RCH2NH2 < RCOOH < RCH2OH
  • RCH2NH2 < RCH2OH < RCOOH
The correct order of basic nature of CH3NH2,(CH3)2NH,(CH3)3N and NH3 is:
  • CH3NH2>(CH3)2NH>(CH3)3N>NH3
  • (CH3)3N>(CH3)2NH>CH3NH2>NH3
  • (CH3)2NH>CH3NH2>(CH3)3N>NH3
  • NH3>(CH3)3N>CH3NH2>(CH3)2NH
Choose the correct order for the boiling points of amines:
  • CH3¨NH2>(CH3)2¨NH>(CH3)3¨N
  • (CH3)2¨NH>(CH3)3¨N>CH3¨NH2
  • (CH3)3¨N<CH3¨NH2<(CH3)2¨NH
  • CH3¨NH2<(CH3)2¨NH<(CH3)3¨N
Among following the weakest base is:
  • C6H5CH2NH2
  • C6H5CH2NHCH3
  • O2NCH2NH2
  • CH3NHCHO
Which has the highest pKb value?
  • R3CNH2
  • R2NH
  • RNH2
  • NH3
The correct order of basic nature in aqueous solution is:
  • C6H5NH2>NH3>CH3NH2>(CH3)2NH
  • NH3>C6H5NH2>CH3NH2>(CH3)2NH
  • (CH3)2NH>CH3NH2>NH3>C6H5NH2
  • CH3NH2>(CH3)2NH>NH3>C6H5NH2
Which one of the following is most basic?
  • FCH2NH2
  • FCH2CH2NH2
  • C6H5NH2
  • C6H5CH2NH2
Which of the following amines would undergoes diazotisation
  • Primary aliphatic amines
  • Primary aromatics amines
  • Both (a) and (b)
  • None of these
The correct increasing order of basic strength of the labeled N is?
1315965_dd8c03d0cbd749ddb302ec1349e57ba1.PNG
  • 1 < 2 < 3 <4
  • 4 < 3 < 2 < 1
  • 1 < 3 < 4 < 2
  • 1 < 2 < 4 < 3
Amines are basic in nature because
  • They produce OH ions when treated with H2O
  • They have polar H atom attached to nitrogen atom
  • They have lone pair of electrons on nitrogen atom
  • They have alkyl group attached with nitrogen atom
The most stable diazonium salt is ........
  • CH3N2X
  • C6H5N2X
  • C2H5N2X
  • C6H5CH2N2X
Which of the following order for basic strength of amines is correct?

74900_983e8f8b3bdb4cdc93af1b54acd8ae3c.png
  • I>III>IV>II
  • IV>I>II>III
  • I>IV>II>III
  • I>II>IV>III
In the following compound the order of basicity is ?
1314179_c379a71f91344a72b3155e4459aea165.PNG
  • IV>I>III>II
  • III>I>IV>II
  • II>I>III>IV
  • I>III>II>IV
Among the following amines, the strongest Bronsted base is 
Which of the following order of basic character are correct ?
  • pCH3O.C6H4NH2>oCH3O.C6H4NH2>mCH3O.C6H4NH2
  • pCH3O.C6H4NH2>mCH3O.C6H4NH2>oCH3O.C6H4NH2
  • oCH3O.C6H4NH2>pCH3O.C6H4NH2>mCH3O.C6H4NH2
  • oCH3O.C6H4NH2>mCH3O.C6H4NH2>pCH3O.C6H4NH2
The correct increasing order of basic strength of the labelled N ?
1311682_a66d3671ad454fdf8e68b84e444a7417.PNG
  • II
  • IV
  • I
  • III
HCONRPOCl3pyridine(a)+H2O; (a) in the above reaction is:
  • RCH=NOH
  • RN=C=O
  • RC=N
  • RN=C
The correct order of decreasing basicity of the given compounds is :
1040877_a7402be6ee15467587a99ebd6641312f.png
  • I > II > III > IV
  • II > I > IV > III
  • III > IV > II > I
  • II > I > III > IV
Amoung the following compounds, the increasing order of their basic strength is :
1317330_ab61279d0e2e4449b4777236f1da89b6.png
  • (I)>(II)<(IV)<(III)
  • (I)>(II)<(III)<(IV)
  • (II)>(I)<(IV)<(III)
  • (II)>(I)<(III)<(IV)
What is the decreasing order of basicity ?
  • NH3>C2H5NH2>(C2H5)2NH>(C2H5)3N
  • (C2H5)3N>(C2H5)2NH>C2H5NH2>NH3
  • (C2H5)2NH>C2H5NH2>(C2H5)3N>NH3
  • (C2H5)2NH>C2H5NH2>NH3>(C2H5)3N
The relationship between the values of osmotic pressure of 0.1 M solutions of KNO3(P1)CH3COOH(P2) is
  • p1>p2
  • p2>p1
  • p1=p2
  • p1p1+p2=p2p1+2p2
RX can be converted into RCH2NH2 by treatment with KCN and 
  • reduction with reducing agent as Na in alcohol
  • hydrolysis with dil. HCl
  • hydrolysis with alkaline H2O2
  • none of these
Which one of the following is the strongest base in aqueous solution?
  • Dimethylamine
  • Methylamine
  • Trimethylamine
  • None of these
Diazonium salts are used:
  • after storing for a few days after preparation
  • immediately after its preparation
  • after storing for 23 hours
  • difficult to prepare commercially
A primary amine {B), on treatment with a solution of AuCl3 in conc. HCl yields a compound whose formula would be?
  • (BH)+.AuCl4
  • (BH2)+.AuCl24
  • (BH)+.HAuCl4
  • B.AuCl4
Which of the following is NOT a correct method of the preparation of benzylamine from cyanobenzene?
  • (i) HCl/H2O (ii) NaBH4
  • (i) LiAlH4 (ii) H3O+
  • (i) SnCl2+HCl(gas) (ii) NaBH4
  • H2/Ni
Considering the basic strength of amines in aqueous solution, which one has the smallest pKb value?
  • (CH3)3N
  • C6H5NH2
  • (CH3)2NH
  • CH3NH2
In the following reactions, the major product W is:
351972.png
Consider the following four compounds I, II, III, and IV.
Choose the correct statement(s).

1950134_4990fe7d31a948cfb48a5d30d2432bb5.png
  • The order of basicity is II>I>III>IV.
  • The magnitude of pKb difference between I and II is more than that between III and IV.
  • Resonance effect is more in III than in IV.
  • Steric effect makes compound IV more basic than III.
The correct statement regarding the basicity of arylamines is:
  • arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring π electron system.
  • arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring π electron system.
  • arylamines are generally more basic than alkylamines because of aryl group.
  • arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridized.
Which of the following will be most stable diazonium salt RN+2X?
  • CH3N+2X
  • C6H5N+2X
  • CH3CH2N+2X
  • C6H5CH2N+2X
What is the decreasing order of strengths of the following bases?
 OH,NH2,HCC and CH3CH2
  • CH3CH2>NH2>HCC>OH
  • HCC>CH3CH2>NH2>OH
  • OH>NH2>HCC>CH3CH2
  • NH2>HCC>OH>CH3CH2
Which of the following compounds is most basic?

In the following reaction, the product (A) is:
313373_a949be68a51e4c7bbac2154d0578f815.png
The major product of the following reaction is:
1618797_ebf66becdb3b46099b6de3464acd274c.png
The correct order of the basic strength of methyl substitited amines in aqueous solution is :
  • (CH3)2NH>CH3NH2>(CH3)3N
  • (CH3)3N>CH3NH2>(CH3)2NH
  • (CH3)3N>(CH3)2NH>CH3NH2
  • CH3NH2>(CH3)2NH>(CH3)3N
In the given replacement reaction, the reaction will be most favourable if M happens to be:
311421_5f9c0b5435ed4b6eb322f99c3f252b44.png
  • K
  • Rb
  • Li
  • Na
Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?
  • H2(excess)/Pt
  • LiAlH4 in ether
  • Fe and HCl
  • Sn and HCl

The correct decreasing order of pKb is:

471189_cb5754fc59624f4080b1e42a4e5f615e.png
  • I>II>III>IV
  • III>IV>III>I
  • II>III>IV>I
  • IV>II>I>III
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