11th Chemistry Weekly Test - 1 ( Fundamentals of Organic Chemistry )

MABS Institution

11th Chemistry Weekly Test - 1 ( Fundamentals of Organic Chemistry )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Which of the following is an example of carbocyclic alicyclic compound?

Pyrrole
Thiophene
Cyclopropane
Phenol

Which of the following compounds gives curdy white precipitate in Lassaigne's test?

CH₃Br
C₂H₅I
CH₃Cl
C₆H₅NO₂

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

Which one of the following is the formula of sodium nitroprusside?

Na₄[Fe(CN)₅NO₅
Na₄[Fe(CN)₅SON]
Na₄[Fe(CN)₆]
Fe₄[Fe(CN)₆]₃

A sample of 0.5g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50mL of 0.5M H₂SO₄. The remaining acid after neutralisation by ammonia consumed 80mL of 0.5 MNaOH, The percentage of nitrogen in the organic compound is.

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.

Assertion: is 3– carbethoxy -2- butenoicacid
Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.

both the assertion and reason are true and the reason is the correct explanation of assertion
both assertion and reason are true and the reason is not the correct explanation of assertion
ssertion is true but reason is false
both the assertion and reason are false

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

Which one of the following is not used as air adsorbent in chromatography?

Alumina
Silica gel
Magnesia
Sucrose

Which of the following compound has maximum number of primary H-atoms?

CH₄
CH₃-CH₂-CH₃
\(\underset { \underset { { CH }_{ 3 } }{ | } }{ { H }_{ 5 }{ C }_{ 2 }-{ CH }-{ CH }_{ 3 } } \)
C (CH₃)₄

Part - B

Generic 2 - Answer All Question

What are the methods used for representing the structure of an organic compound?

Define sublimation. Give two examples.

Which of the following selected chains is correct to name the given compound according to IUPAC system?
Give the general characteristics of organic compounds?

How will you prepare Lassaigne's extract?

Part - C

Generic 3 - Answer All Question

0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg₂P₂O₇ by the analysis. Calculate the percentage of P in the compound.

0.3780 g of an organic compound gave 0.5740 g of silver chloride in Carius estimation. Calculate the percentage of chlorine in the compound.

Explain about the oxidation test for sulphur.

In an estimation of sulphur by Carius method, 0.468 of an organic sulphur compound gave 0.668 g of barium sulphate. Find the percentage of sulphur in the compound.
Draw the structures of:
(i) 3-methylhepta 1, 3, 5-triene,
(ii) pent-l-yne,
(iii) 2-methylpropan-2-ol

Part - D

Generic 5 - Answer All Question

Explain about the estimation of halogens by carius method.

How will you estimate phosphorous in an organic compound?

Consider the structures I to VII and answer the following questions (i) to (v)
(i) CH₃-CH₂-CH₂-CH₂-OH
(ii) \({ CH }_{ 3 }-{ CH }_{ 2 }-\underset { \overset { | }{ OH } }{ CH } -{ CH }_{ 3 }\)
(iii) \({ CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -{ CH }_{ 3 }\)
(iv) \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ { CH }_{ 3 } } -{ CH }_{ 2 }-OH\)
(v) CH₃ -CH₂ -O-CH₂ -CH₃
(vi) CH₃ - O - CH₂ - CH₂ - CH₃
(vii) \({ CH }_{ 3 }-O-\underset { \overset { | }{ { CH }_{ 3 } } }{ { CH } } -{ CH }_{ 3 }\)
(i) Which of the above compounds form pairs of metamers?
(ii) Identify the pairs of compounds which are functional isomers.
(iii) Identify the pairs of compounds that represent position isomerism.
(iv) Identify the pairs of compounds that represent chain isomerism.
(v) Does any of these compounds possess geometrical isomerism? If yes identify them. If no, give reason.
0.50 g of an organic compound was Kjeldahlished. The ammonia evolved was passed in 50 cm³of IN H₂S0₄, The residual acid required 60 cm³ of N/2 NaOH solution. Calculate the percentage of nitrogen in the compound.

Give an account on the estimation of phosphorus by Carius method.

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11th Chemistry Weekly Test - 1 ( Fundamentals of Organic Chemistry )

MABS Institution

11th Chemistry Weekly Test - 1 ( Fundamentals of Organic Chemistry )-Aug 2020

Part - A

Multiple Choice Question - Answer All Question

Which of the following is an example of carbocyclic alicyclic compound?

Which of the following compounds gives curdy white precipitate in Lassaigne's test?

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

Which one of the following is the formula of sodium nitroprusside?

A sample of 0.5g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50mL of 0.5M H2SO4. The remaining acid after neutralisation by ammonia consumed 80mL of 0.5 MNaOH, The percentage of nitrogen in the organic compound is.

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.

Assertion: is 3– carbethoxy -2- butenoicacid Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.

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

Which one of the following is not used as air adsorbent in chromatography?

Which of the following compound has maximum number of primary H-atoms?

Part - B

Generic 2 - Answer All Question

What are the methods used for representing the structure of an organic compound?

Define sublimation. Give two examples.

Which of the following selected chains is correct to name the given compound according to IUPAC system?

Give the general characteristics of organic compounds?

How will you prepare Lassaigne's extract?

Part - C

Generic 3 - Answer All Question

0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg2P2O7 by the analysis. Calculate the percentage of P in the compound.

0.3780 g of an organic compound gave 0.5740 g of silver chloride in Carius estimation. Calculate the percentage of chlorine in the compound.

Explain about the oxidation test for sulphur.

In an estimation of sulphur by Carius method, 0.468 of an organic sulphur compound gave 0.668 g of barium sulphate. Find the percentage of sulphur in the compound.

Draw the structures of: (i) 3-methylhepta 1, 3, 5-triene, (ii) pent-l-yne, (iii) 2-methylpropan-2-ol

Part - D

Generic 5 - Answer All Question

Explain about the estimation of halogens by carius method.

How will you estimate phosphorous in an organic compound?

0.50 g of an organic compound was Kjeldahlished. The ammonia evolved was passed in 50 cm3 of IN H2S04, The residual acid required 60 cm3 of N/2 NaOH solution. Calculate the percentage of nitrogen in the compound.

Give an account on the estimation of phosphorus by Carius method.

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A sample of 0.5g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50mL of 0.5M H₂SO₄. The remaining acid after neutralisation by ammonia consumed 80mL of 0.5 MNaOH, The percentage of nitrogen in the organic compound is.

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.

Assertion: is 3– carbethoxy -2- butenoicacid
Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.

0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg₂P₂O₇ by the analysis. Calculate the percentage of P in the compound.

Draw the structures of:
(i) 3-methylhepta 1, 3, 5-triene,
(ii) pent-l-yne,
(iii) 2-methylpropan-2-ol

0.50 g of an organic compound was Kjeldahlished. The ammonia evolved was passed in 50 cm³of IN H₂S0₄, The residual acid required 60 cm³ of N/2 NaOH solution. Calculate the percentage of nitrogen in the compound.