# Purification, Classification and Nonemeclature of Organic Compound Test 1

Total Questions:50 Total Time: 75 Min

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## Questions 1 of 50

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

$$C{H_2}O$$

$${C_2}{H_3}{O_3}$$

$$C{H_2}{O_2}$$

$${C_2}{H_2}{O_2}$$

## 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

$${C_3}{H_6}{O_3}$$

$${C_2}{H_4}{O_2}$$

$${C_2}{H_4}O$$

$$C{H_2}O$$

## 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

$${C_4}{H_8}{N_4}$$

$${C_2}{H_4}{N_2}$$

$${C_{12}}{H_{24}}{N_{12}}$$

$${C_{16}}{H_{32}}{N_{16}}$$

## Questions 4 of 50

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

350

470

560

940

## Questions 5 of 50

Question:Which element is estimated by Carius method

Carbon

Hydrogen

Halogen

Nitrogen

## Questions 6 of 50

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

$$\% N = \frac{{1.4{\rm{ }}V{\rm{ }}W}}{N}$$

$$\% N = \frac{{1.4{\rm{ }}N{\rm{ }}W}}{V}$$

$$\% N = \frac{{V{\rm{ }}N{\rm{ }}W}}{{1.8}}$$

$$\% N = \frac{{1.4{\rm{ }}V{\rm{ }}N}}{W}$$

## 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

$$C{H_3}O$$

$${C_2}{H_4}O$$

$${C_3}{H_4}O$$

$${C_4}{H_8}O$$

## 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

$${C_6}{H_6}$$

$${C_7}{H_7}$$

$${C_6}{H_{18}}$$

$${C_8}{H_{20}}$$

## 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 ?

$${C_2}{H_5}{N_2}$$

$${C_2}{H_5}N$$

$${C_2}{H_7}N$$

$${C_2}{H_6}N$$

## Questions 10 of 50

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

$${C_6}{H_6}$$

$${C_2}{H_5}OH$$

$${C_2}{H_6}$$

$$CHC{l_3}$$

## 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

$$CHClO$$

$$C{H_2}ClO$$

$${C_2}{H_2}OCl$$

$$ClC{H_2}O$$

## 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

$$HCHO$$

$$C{H_3}OH$$

$$C{H_3}C{H_2}OH$$

$${H_2} \to {H^ \bullet } + {H^ \bullet }$$

## 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

18.52g

182.2 g

17. 5 g

175.2g

## Questions 14 of 50

Question:In kjeldahl's method, $$CuS{O_4}$$ acts as

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

$${C_2}{H_4}{O_2}$$

$${C_3}{H_6}{O_3}$$

$${C_4}{H_8}{O_4}$$

$$C{H_2}O$$

## 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

56

112

80

28

## Questions 17 of 50

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

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

$$NaOH + CaO$$

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

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

$$C{H_3} - C{H_2} - \mathop {\mathop {C\,\,\,\,\,\,\,\, - \,\,\,\,\,\,}\limits_{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}^{\mathop {\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\limits^{\,C{H_3}C{H_2}\,\,\,\,} } }\limits_{\,\,C{H_2}C{H_3}\,\,\,\,\,} \mathop {CH\, - \,}\limits^{\mathop {|\,\,\,\,\,\,}\limits^{C{H_3}} \,\,\,\,\,\,} C{H_2} - {(C{H_2})_2} - C{H_3}$$ 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

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

$$C{H_3}NCO$$

$$C{H_3}CON{H_2}$$

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

$$C{H_3}C{H_2}CON{H_2}$$

## 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

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

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

Acetonitrile

Ethanenitrile

Methyl cyanide

Cyanoethane

## Questions 26 of 50

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

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

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

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

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

## Questions 27 of 50

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

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

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

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

2-methylbutene-1

3-methylbutene-1

Vinyl methylethane

Propylethene-1

## Questions 31 of 50

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

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

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

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

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

## Questions 32 of 50

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

$${120^o}$$ 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

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

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

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 $$C{H_3} - \mathop {\mathop {CH - }\limits^{|\,\,\,\,} }\limits^{C{H_3}} \mathop {\mathop {CH - \mathop {\mathop {CH - C{H_3}}\limits^{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits^{C{H_3}\,\,\,\,\,\,\,\,\,\,\,} }\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_2} - C{H_3}\,\,\,\,\,\,\,\,}$$

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

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 $$C{H_3} - \mathop {\mathop {C = \mathop {\mathop C\limits^| }\limits^H }\limits_{|\,\,\,\,\,\,\,\,\,} }\limits_{C{H_3}\,\,\,} - COOH$$

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

$${(C{H_3})_4}C$$

$$HCHO$$

$$C{H_3}CHO$$

$${(C{H_3})_4}C$$

## 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

2

3

1

4

## Questions 41 of 50

Question:The compound which has one isopropyl group is

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 $$C{H_3} - \mathop {\mathop {\,C\, - \,}\limits_{|\,\,\,\,\,\,}^{|\,\,\,\,\,} }\limits_{OH\,}^{H\,} C{H_2} - C{H_2} - C{H_2} - \mathop {\mathop {C\,}\limits_{|\,\,\,}^{|\,\,\,\,} }\limits_{Br}^{Br} - C{H_3}$$

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 :

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

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.....

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

$${C_n}{H_{2n + 2}}$$

$${C_n}{H_{2n - 2}}$$

$${C_n}{H_{2n}}$$

$${C_{2n}}{H_2}$$

## Questions 47 of 50

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

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 $$\mathop {\mathop {C{H_2} - CH - C{H_2}}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,} }\limits_{CN\,\,\,\,\,\,\,CN\,\,\,\,\,\,CN\,\,}$$

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

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