Purification, Classification and Nonemeclature of Organic Compound Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:An organic compound contains \(C = 36\% \) \(H = 6\% \) and rest oxygen. Its Empirical formula is

Answers Choices:

\(C{H_2}O\)

\({C_2}{H_3}{O_3}\)

\(C{H_2}{O_2}\)

\({C_2}{H_2}{O_2}\)

Questions 2 of 50

Question:Empirical formula of a compound is \(C{H_2}O\) and its vapour density is 30. Molecular formula of the compound is

Answers Choices:

\({C_3}{H_6}{O_3}\)

\({C_2}{H_4}{O_2}\)

\({C_2}{H_4}O\)

\(C{H_2}O\)

Questions 3 of 50

Question:An organic compound on analysis gave C = 48 gm, H = 8 gm and N = 56 gm. Volume of 1.0 g of the compound was found to be 200 ml at NTP. Molecular formula of the compound is

Answers Choices:

\({C_4}{H_8}{N_4}\)

\({C_2}{H_4}{N_2}\)

\({C_{12}}{H_{24}}{N_{12}}\)

\({C_{16}}{H_{32}}{N_{16}}\)

Questions 4 of 50

Question:Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is

Answers Choices:

350

470

560

940

Questions 5 of 50

Question:Which element is estimated by Carius method

Answers Choices:

Carbon

Hydrogen

Halogen

Nitrogen

Questions 6 of 50

Question:In Kjeldahl's method for the estimation of nitrogen, the formula used is

Answers Choices:

\(\% N = \frac{{1.4{\rm{ }}V{\rm{ }}W}}{N}\)

\(\% N = \frac{{1.4{\rm{ }}N{\rm{ }}W}}{V}\)

\(\% N = \frac{{V{\rm{ }}N{\rm{ }}W}}{{1.8}}\)

\(\% N = \frac{{1.4{\rm{ }}V{\rm{ }}N}}{W}\)

Questions 7 of 50

Question:An organic compound on analysis gave the following results : C = 54.5%, O = 36.4%, H = 9.1%. The Empirical formula of the compound is

Answers Choices:

\(C{H_3}O\)

\({C_2}{H_4}O\)

\({C_3}{H_4}O\)

\({C_4}{H_8}O\)

Questions 8 of 50

Question:An organic compound gave C = 92.31% and \(H = 7.69\% \). If molecular weight of the compound is 78, its molecular formula is

Answers Choices:

\({C_6}{H_6}\)

\({C_7}{H_7}\)

\({C_6}{H_{18}}\)

\({C_8}{H_{20}}\)

Questions 9 of 50

Question:An organic compound gave the following results \(C = 53.3\% ,{\rm{ }}H = 15.6,{\rm{ }}N = 31.1\% ,\) mol. wt. = 45, What is molecular formula of the compound ?

Answers Choices:

\({C_2}{H_5}{N_2}\)

\({C_2}{H_5}N\)

\({C_2}{H_7}N\)

\({C_2}{H_6}N\)

Questions 10 of 50

Question:A compound gave 80% carbon and 20 % hydrogen on analysis. The compound is possibly

Answers Choices:

\({C_6}{H_6}\)

\({C_2}{H_5}OH\)

\({C_2}{H_6}\)

\(CHC{l_3}\)

Questions 11 of 50

Question:If a compound on analysis was found to contain C = 18.5%, H = 1.55%, Cl = 55.04% and O = 24.81%, then its empirical formula is

Answers Choices:

\(CHClO\)

\(C{H_2}ClO\)

\({C_2}{H_2}OCl\)

\(ClC{H_2}O\)

Questions 12 of 50

Question:An organic compound has % of C and % of H in the ratio 6 : 1 and % of C and % of O in the ratio 3 : 4. The compound is

Answers Choices:

\(HCHO\)

\(C{H_3}OH\)

\(C{H_3}C{H_2}OH\)

\({H_2} \to {H^ \bullet } + {H^ \bullet }\)

Questions 13 of 50

Question:0.2595g of an organic substance in a quantitative analysis yielded 0.35 g of the barium sulphate. The percentage of sulphur in the substance is

Answers Choices:

18.52g

182.2 g

17. 5 g

175.2g

Questions 14 of 50

Question:In kjeldahl's method, \(CuS{O_4}\) acts as

Answers Choices:

Oxidising agent

Reducing agent

Hydrolysing agent

Catalytic agent

Questions 15 of 50

Question:The Empirical formula of a compound is \(C{H_2}O\) and its molecular weight is 120. The molecular formula of the compound is

Answers Choices:

\({C_2}{H_4}{O_2}\)

\({C_3}{H_6}{O_3}\)

\({C_4}{H_8}{O_4}\)

\(C{H_2}O\)

Questions 16 of 50

Question:In Victor Mayer's method 0.2 gm of an organic substance displaced 56 ml of air at STP the molecular weight of the compound

Answers Choices:

56

112

80

28

Questions 17 of 50

Question:If we want to study relative arrangement of atoms in a molecule we study

Answers Choices:

Empirical formula

Molecular formula

Structural formula

None of these

Questions 18 of 50

Question:Which one of the following reagents is used for detection of unsaturation in alkenes

Answers Choices:

\(NaOH + CaO\)

Cold dilute alkaline \(KMn{O_4}\)

\(C{l_2}/hv\)

\(KOH/{C_2}{H_5}OH\)

Questions 19 of 50

Question:The study of organic compounds even at present is done separate from other compounds because

Answers Choices:

The formation of organic compounds is not based on chemical combination

Organic compounds are covalent

Catenation is the main characteristics

It is the easiest method of study

Questions 20 of 50

Question:Which of the following pair of the species has the same percentage of carbon

Answers Choices:

\(C{H_3} - C{H_2} - \mathop {\mathop {C\,\,\,\,\,\,\,\, - \,\,\,\,\,\,}\limits_{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}^{\mathop {\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\limits^{\,C{H_3}C{H_2}\,\,\,\,} } }\limits_{\,\,C{H_2}C{H_3}\,\,\,\,\,} \mathop {CH\, - \,}\limits^{\mathop {|\,\,\,\,\,\,}\limits^{C{H_3}} \,\,\,\,\,\,} C{H_2} - {(C{H_2})_2} - C{H_3}\) and \({C_2}{H_5}OH\)

\({C_6}{H_{12}}{O_6}\) and \({C_{12}}{H_{22}}{O_{11}}\)

\({C_6}{H_{12}}{O_6}\) and \({C_{12}}{O_{22}}{O_{11}}\)

\({C_{12}}{O_{22}}{O_{11}}\) and \({C_6}{H_{12}}{O_6}\)

Questions 21 of 50

Question:In Kjeldahl's method of estimation of N,\(CuS{O_4}\)acts as

Answers Choices:

Oxidising agent

Reducing agent

Catalytic agent

Hydrolysis agent

Questions 22 of 50

Question:An organic compound having molecular mass 60 is found to contain C = 20%, H= 6.67% and N=46.67% while rest is oxygen. On heating it gives \(N{H_3}\) alongwith a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. the compound is

Answers Choices:

\(C{H_3}NCO\)

\(C{H_3}CON{H_2}\)

\({(N{H_2})_2}CO\)

\(C{H_3}C{H_2}CON{H_2}\)

Questions 23 of 50

Question:IUPAC name of the compound is \(C{H_3} - \mathop {\mathop {\mathop {\mathop {CH}\limits_{|\,\,\,\,\,} }\limits_{C{H_2}} }\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}} - C{H_2} - CH(OH) - C{H_3}\) is

Answers Choices:

4-ethyl-2-pentanol

4-methyl-2-hexanol

2-ethyl-2-pentanol

3-methyl-2-hexanol

Questions 24 of 50

Question:IUPAC name of the compound is \(C{H_3} - CH = \mathop {\mathop {C - C{H_3}}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_2} - C{H_2}} \)

Answers Choices:

2-ethyl-2-butene

3-ethyl-2-butene

3-Methyl-3-pentene

3-methyl-2-pentene

Questions 25 of 50

Question:The IUPAC name of \(C{H_3}C \equiv N\)is

Answers Choices:

Acetonitrile

Ethanenitrile

Methyl cyanide

Cyanoethane

Questions 26 of 50

Question:Which compound is 2, 2, 3-trimethylhexane

Answers Choices:

\(\begin{array}{*{20}{c}} {C{H_3}\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,} \\ {|\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3} - C - CH - C{H_2} - C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\\end{array}\)

\(\begin{array}{*{20}{c}} {\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,} \\ {C{H_3} - C - C{H_2} - CH - C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\\end{array}\)

\(\begin{array}{*{20}{c}} {C{H_3}\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {|\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3} - C - CH - C{H_2} - C{H_2} - C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\\end{array}\)

\(\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ {C{H_3} - CH - C{H_2} - C{H_2} - C - C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,} \\ {\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\\end{array}\)

Questions 27 of 50

Question:IUPAC name of the compound is \(C{H_3}C{H_2}C{H_2}C{H_2}C{H_2} - \mathop {\mathop {CH - }\limits_{|\,\,\,\,\,\,\,\,\,} }\limits_{C{H_3}\,\,} \mathop {\mathop {\mathop {\mathop {C - C{H_2}C{H_3}\,\,\,\,\,\,\,}\limits^{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits^{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_2}\,\,C{H_2}C{H_3}\,\,\,\,\,} \)

Answers Choices:

3, 4-dimethyl-3-n-propyl nonane

5, 7-dimethyl-7-n-propyl nonane

4, 5-dimethyl-4-ethyl decane

6, 7-dimethyl-7-ethyl decane

Questions 28 of 50

Question:IUPAC name of \(C{H_3} - \mathop {\mathop {CH - C{H_2}}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_3}\,\,\,\,\,\,\,\,\,\,\,} - CH = C{H_2}\) is

Answers Choices:

2-methyl pentene

4-methyl pentene-1

1-hexene

2-methyl pentene-1

Questions 29 of 50

Question:In the structure \(^1{H_3}C - \mathop {\mathop {\mathop {\mathop {^2C - {\,^3}C{H_2} - {\,^4}C{H_3}}\limits^{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits^{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \) Which one is quarternary carbon atom

Answers Choices:

C – 1

C – 2

C – 3

C – 5

Questions 30 of 50

Question:The IUPAC name of \(C{H_3} - C{H_2} - \mathop {\mathop {C = }\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}} C{H_2}\) is

Answers Choices:

2-methylbutene-1

3-methylbutene-1

Vinyl methylethane

Propylethene-1

Questions 31 of 50

Question:2-methyl-2-butene will be represented as

Answers Choices:

\(C{H_3} - \mathop {\mathop {CH}\limits_{|\,\,\,\,} }\limits_{C{H_3}} - C{H_2} - C{H_3}\)

\(C{H_3} - \mathop {\mathop {C = }\limits_{|\,\,\,\,} }\limits_{C{H_3}} CH - C{H_3}\)

\(C{H_3} - C{H_2} - \mathop {\mathop {C = }\limits^{|\,\,\,\,\,} }\limits^{C{H_3}} C{H_2}\)

\(C{H_3} - \mathop {\mathop {CH - }\limits_{|\,\,\,\,} }\limits_{C{H_3}} CH = C{H_2}\)

Questions 32 of 50

Question:\(Cl - C - Cl\) angle in 1, 1, 2, 2 - tetrachloroethene and tetrachloromethane respectively are about

Answers Choices:

\({120^o}\) and \({109.5^o}\)

\({90^o}\) and \({109.5^o}\)

\({109.5^o}\) and \({90^o}\)

\({109.5^o}\) and \({120^o}\)

Questions 33 of 50

Question:The IUPAC name of succinic acid is

Answers Choices:

1, 4-butanedioic acid

Dimethyl-2-acid

1, 2-dimethyldioic acid

None of these

Questions 34 of 50

Question:IUPAC name of \({(C{H_3})_2}CH - C{H_2} - C{H_2}Br\) is

Answers Choices:

1-bromopentane

2-methyl-4-bromobutane

1-bromo-3-methylbutane

2-methyl-3-romopropane

Questions 35 of 50

Question:IUPAC name of \(C{H_3} - \mathop {\mathop {\mathop {\mathop {C - }\limits^{|\,\,\,\,} }\limits^{OH} }\limits_{|\,\,\,\,\,} }\limits_{C{H_3}} C{H_2} - \mathop {\mathop {CH - }\limits_{|\,\,\,\,\,\,\,} }\limits_{C{H_3}\,} C{H_3}\) is

Answers Choices:

2, 4-dimethyl pentanol-2

2, 4-dimethyl pentanol-4

2, 2-dimethyl butanol-2

None of these

Questions 36 of 50

Question:Which is correct IUPAC name of the following compound \(C{H_3} - \mathop {\mathop {CH - }\limits^{|\,\,\,\,} }\limits^{C{H_3}} \mathop {\mathop {CH - \mathop {\mathop {CH - C{H_3}}\limits^{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits^{C{H_3}\,\,\,\,\,\,\,\,\,\,\,} }\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_2} - C{H_3}\,\,\,\,\,\,\,\,} \)

Answers Choices:

3-isopropyl-2-methylpentane

3-ethyl-2,4-dimethylpentane

2,4-dimethyl-3-ethylpentane

3-isopropyl-4-methylpentane

Questions 37 of 50

Question:IUPAC name of \(C{H_3} - CH = CH - C \equiv CH\) is

Answers Choices:

Pent-2-en-4-yne

Pent-3-en-1-yne

Pent-3-yne-1-en

Pent-2-yne-1-en

Questions 38 of 50

Question:The IUPAC name for the formula \(C{H_3} - \mathop {\mathop {C = \mathop {\mathop C\limits^| }\limits^H }\limits_{|\,\,\,\,\,\,\,\,\,} }\limits_{C{H_3}\,\,\,} - COOH\)

Answers Choices:

2-methyl-2-butenoic acid

3-methyl-3-butenoic acid

3-methyl-2-butenoic acid

2-methyl-3-butenoic acid

Questions 39 of 50

Question:Which of the following alkanes contains primary, secondary, tertiary and quaternary carbon atoms together

Answers Choices:

\({(C{H_3})_4}C\)

\(HCHO\)

\(C{H_3}CHO\)

\({(C{H_3})_4}C\)

Questions 40 of 50

Question:The number of tertiary carbon atoms in the compound \({(C{H_3})_2}CHC{H_2}C\;{(C{H_3})_3}\) is

Answers Choices:

2

3

1

4

Questions 41 of 50

Question:The compound which has one isopropyl group is

Answers Choices:

2, 2, 3, 3-tetramethyl pentane

3, 3-dimethyl pentane

2, 2, 3-trimethyl pentane

2-methyl pentane

Questions 42 of 50

Question:Write the IUPAC name of \(C{H_3} - \mathop {\mathop {\,C\, - \,}\limits_{|\,\,\,\,\,\,}^{|\,\,\,\,\,} }\limits_{OH\,}^{H\,} C{H_2} - C{H_2} - C{H_2} - \mathop {\mathop {C\,}\limits_{|\,\,\,}^{|\,\,\,\,} }\limits_{Br}^{Br} - C{H_3}\)

Answers Choices:

6, 6-dibromoheptane-2-ol

2, 2-dibromoheptane-6-ol

6, 6 dibromoheptane-2-ol

None of these

Questions 43 of 50

Question:The name of \(Cl{H_2}C - \mathop {\mathop C\limits_{|\,\,} }\limits_{Br} = \mathop {\mathop C\limits_{|\,\,} }\limits_{Br} - C{H_2}Cl\) according to IUPAC nomenclature system is :

Answers Choices:

2,3 dibromo-1, 4-dichlorobutene-2

1, 4-dichloro-2, 3-bromobutene-2

Dichlorodibromobutene

Dichlorodibromobutane

Questions 44 of 50

Question:The IUPAC name of acraldehyde is

Answers Choices:

Prop-2-ene–1–al

Propenyl aldehyde

But-2-ene–1–al

Propenal

Questions 45 of 50

Question:IUPAC name of the compound \(C{H_3} - \mathop {\mathop {CH}\limits_{|\,\,\,\,\,\,} }\limits_{OH} - C{H_2} - \mathop {\mathop {CH}\limits_{|\,\,\,\,\,\,\,} }\limits_{C{H_3}} - C{H_3}\) is.....

Answers Choices:

4-methyl pentene-2-ol

2-methyl pentanol-4

4, 4-dimethyl butan-2-ol

4-methyl pentane-2-ol

Questions 46 of 50

Question:Cycloalkane has the formula

Answers Choices:

\({C_n}{H_{2n + 2}}\)

\({C_n}{H_{2n - 2}}\)

\({C_n}{H_{2n}}\)

\({C_{2n}}{H_2}\)

Questions 47 of 50

Question:The IUPAC name of \(C{H_3} - \mathop {\mathop {CH}\limits^{|\,\,\,\,} }\limits^{Cl\,} - C{H_3}\) is

Answers Choices:

2-chloropropane

Chloropropane

1-chloropropane

2-chlorobutane

Questions 48 of 50

Question:The IUPAC name of \(C{H_3} - \mathop {\mathop {CH - }\limits_{|\,\,\,\,\,\,\,\,\,\,} }\limits_{OH\,\,\,} C{H_2} - \mathop {\mathop {\mathop {\mathop {C - }\limits_{|\,\,\,\,\,} }\limits_{OH} }\limits^{|\,\,\,\,\,} }\limits^{C{H_3}} C{H_3}\) and \(\mathop {\mathop {C{H_2} - CH - C{H_2}}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,} }\limits_{CN\,\,\,\,\,\,\,CN\,\,\,\,\,\,CN\,\,} \)

Answers Choices:

1, 1-dimethyl-1, 3-butanediol and propanetricarbyl amine

4-methyl-2, 4-pentanediol and 1, 2, 3 propanetrinitrile

2-methyl 2, 4-pentanediol and 3 cyano 1, 5-pentanedinitrile

1, 3, 3-trimethyl 1,3-propanediol and 1, 2, 3 tricyano propane

Questions 49 of 50

Question:The IUPAC name of \(C{H_3}C{H_2}C(Br) = CH - Cl\) is

Answers Choices:

2-bromo-1-chloro butane

1-chloro-2-bromo-butene

3-chloro-2-bromo butene-2

None of these

Questions 50 of 50

Question:Which of the following compounds is not chiral

Answers Choices:

1-chloro-2-methyl pentane

2-chloropentane

1-chloropentane

3-chloro-2-methyl pentane