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11th Chemistry Weekly Test - 3 ( Fundamentals of Organic Chemistry )

MABS Institution

11th Chemistry Weekly Test - 3 ( Fundamentals of Organic Chemistry )-Aug 2020

Time : 1.00 Hours

Part - A

Multiple Choice Question - Answer All Question

Which of the following pair are called functional isomers?

methyl propyl ether and diethyl ether
2-pentanone & 3-pentanone
propanoic acid and methyl acetate
1-butanol and 2-butanol

Nitrobenzene and benzene can be separated by the method of

steam distillation
crystallization
fractional crystallization
chromatography

Statement 1. The tendency of an atom to form a chain of bonds with the atoms of the same element is called catenation.
Statement 2. The high strength of C--C bond is responsible for its catenation property.

Statement 1 & 2 are correct and statement 2 is the correct explanation of statement 1.
Statement 1 & 2 are correct but statement 2 is not the correct explanation of statement 1.
Statement 1 is correct but statement 2 is wrong
Statement 1 is wrong but statement 2 is correct.

When stationary phase is solid, then the compounds can be separated on the basis of

Adsorption
Partition
Both (a) & (b)
Neither (a) nor (b)

Which one of the following is used as a column in the separation of pigments of chlorophyll by chromatography technique?

Petroleum ether
CaCO₃
Activated charcoal
Ethanoic acid

Which of the following is used to decolourise the organic compounds?

Chlorine
Bleaching powder
Animal charcoal
Iodine

Number of structural isomers possible in C₃H₆O are

9
6
5
3

Which one of the following names does not fit a real name?

3 – Methyl –3–hexanone
4–Methyl –3– hexanone
3– Methyl –3– hexanol
2– Methyl cyclo hexanone

The IUPAC name of the compound \({ CH }_{ 3 }-\underset { \overset { | }{ OH } }{ CH } -COOH\) is

2 – Hydroxypropionic acid
2 – Hydroxy Propanoic acid
Propan – 2– ol –1 – oic acid
1 – Carboxyethanol

What is the method involved in purification of chloroform and aniline?

Sublimation
Crystallization
Distillation
Chromatography

Which of the following is used as moisture absorbent?

Potash
Soda
Cone. H₂SO₄
Na₂CO₃

The general molecular formula which represents the homologous series of alkanols is

C_nH_2nO₂
C_nH_2nO
C_nH_2n+lO
C_nH_2n+2O

How many cyclic and acyclic isomers are possible for the molecular formula C₃H₆O?

4
5
9
10

Which of the following does not show optical isomerism?

Glucose
Tartaric acid
Lactic acid
Methane

Which of the following is optically active?

3 – Chloropentane
2 Chloro propane
Meso – tartaric acid
Glucose

Compounds having boiling points widely apart 40k and above can be purified by________.

Crystallisation
Sublimating
Fractional distillation
Simple distillation

The IUPAC name ofthe compound

Cyclopentylethyne
Ethynyl cyclopentane
Cyclopentyl acetylene
Ethynyl pentane

Which one of the following is not identified by Lassaigne's test?

nitrogen
sulphur
halogens
phosphorous

The IUPAC name of is

2 – Bromo -3 – methyl butanoic acid
2 - methyl - 3- bromobutanoic acid
3 - Bromo - 2 - methylbutanoic acid
3 - Bromo - 2, 3 - dimethyl propanoic acid

Which one of the following shows geometrical isomerism?

n-Butane
1-butene
2-butene
butyne

Which one of the following indicates isothiocyanate functional group?

-NC
-NCS
-SCN
-NCO

Principle behind crystallization is

solubility difference
boiling point difference
refractive index difference
difference in vapour pressure

Which structure is named as 3-chlorocyclobut-1-ene?

Which of the following pair is an example of aromatic compounds?

Benzene, Toluene
Cyclopropane, Cyclobuane
Pyridine, Pyrrole
Propane, Butane

Which of the following will absorb CO₂?

Cone. H₂SO₄
KOH
HCl
Copper

Which of the following sodium fusion extract of organic compound gives brilliant violet colour with sodium nitroprusside solution?

Urea
Thiourea
Benzoic acid
Aniline

The correct order of increasing bond length of C-H, C-O, C-C, and C=C is

C-H < C-O < C-C < C=C
C-H < C=C < C-O < C-C
C-C < C=C < C-O < C-H
C-O < C-H < C-C < C=C

Nitrogen detection in an organic compound is carried out by Lassaigne’s test. The blue colour formed is due to the formation of.

Fe₃[Fe(CN)₆]₂
Fe₄[Fe(CN)₆]₃
Fe₄[Fe(CN)₆]₂
Fe₃ [Fe(CN)₆]₃

\( { CH }_{ 3 }-{ CH }_{ 2 }-{\underset { \underset { OH }{ | } }{ CH }-CH_{ 2 }-{ CH }_{ 2 }-{ CH }_{ 3 } } \) and \( { CH }_{ 3 }-{ CH }_{ 2 }- CH_{ 2 } -\underset{\overset{|}{OH}}{CH}-{ CH }_{ 3 } \) are

Functional isomers
Position isomers
Chain isomers
These are not isomers

Which one of the following is called benzylchloride?

C₆H₅CH₂Cl
C₆H₅CHCl₂
C₆H₅CCl₃
C₆H₅Cl

Ortho and para-nitro phenol can be separated by

azeotropic distillation
destructive distillation
steam distillation
cannot be separated

Identify the colour formed when Lassigne's extract of sulphur containing organic compound is mixed with sodium nitroprusside solution?

Prussian blue
Black
Green
Purple

The isomer of ethanol is

acetaldehyde
dimethyl ether
acetone
methyl carbinol

The IUPAC name of the compound \({ H }_{ 3 }C-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -CH=C{ \left( { CH }_{ 3 } \right) }_{ 2 }\) is

2,4,4 – Trimethylpent -2-ene
2,4,4 – Trimethylpent -3-ene
2,2,4 – Trimethylpent -3-ene
2,2,4 – Trimethylpent -2-ene

The purity of an organic compound is determined by

Chromatography
Crystallisation
melting or boiling point
both (a) and (c)

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