Organic Chemistry Some Basic Principles and Techniques Test

Question 1
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In which of the following compounds the carbon marked with asterisk is expected to have greatest positive charge?

A
\(^*CH_3-CH_2-Cl\)

B
\(^*CH_3-CH_2-Mg^+Cl^-\)

C
\(^*CH_3-CH_2-Br\)

D
\(^*CH_3-CH_2-CH_3\)

Question 2
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Ionic species are stabilized by the dispersal of charge. Which of the following carboxylate ion is the most stable?

A
\(CH_3-\overset{\overset{O}{||}}{C}-O^-\)

B
\(Cl-CH_2-\overset{\overset{O}{||}}{C}-O^-\)

C
\(F-CH_2-\overset{\overset{O}{||}}{C}-O^-\)

D
\(^{^F\backslash}_{_F/}CH-\overset{\overset{O}{||}}{C}-O^-\)

Question 3
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Note : Consider the following four compounds for answering questions

I. \(CH_3-CH_2-CH_2-CH_2-\overset{\overset{O}{||}}{C}-H\)

II. \(CH_3-CH_2-CH_2-\overset{\overset{O}{||}}{C}-CH_3\)

III. \(CH_3-CH_2-\underset{\underset{O}{||}}{C}-CH_2-CH_3\)

IV. \(CH_3-\underset{\underset{CH_3}{|}}{CH}-CH_2-\underset{\underset{O}{||}}{C}-H\)

Which of the following pairs are not functional group isomers?

(i) II and III

(ii) II and IV

(iii) I and IV

(iv) I and II

A
(i),(ii)

B
(ii),(iii)

C
(iii),(iv)

D
(i),(iv)

Question 4
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Match the intermediates given in Column I with their probable structure in Column II.

Column I Column II

(i) Free radical (a) Trigonal planar

(ii) Carbocation (b) Pyramidal

(iii) Carbanion (c) Linear

A
(i) → (a), (ii) → (c) (iii) → (b)

B
(i) → (a), (ii) → (a) (iii) → (b)

C
(i) → (a), (ii) → (a) (iii) → (c)

D
(i) → (c), (ii) → (a) (iii) → (b)

Question 5
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Nucleophile is a species that should have

(i) a pair of electrons to donate

(ii) positive charge

(iii) negative charge

(iv) electron deficient species

A
(i),(iv)

B
(ii),(iii)

C
(i),(iii)

D
(i),(ii)

Question 6
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In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Sulphur present in an organic compound can be estimated quantitatively by Carious method.

Reason (R): Sulphur is separated easily from other atoms in the molecule and gets precipitated as light yellow solid.

A
Both A and R are correct and R is the correct explanation of A

B
Both A and R are correct but R is not the correct explanation of A

C
Both A and R are not correct

D
A is not correct but R is correct

Question 7

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Match the ions given in Column I with their nature given in Column II.

Column I	Column II
(i) \(CH_3-\underset{..}{\overset{..}{O}}-\overset{\oplus}{C}H-CH_3\)	(a) Stable due to resonance
(ii) \(F_3-C^{\oplus}\)	(b) Destabilized due to inductive effect
(iii) \(CH_3-\underset{CH_3}{\overset{\overset{\overset{CH_3}{\|}}{C^{\ominus}}}{\|}}\)	(c) Stabilized by hyperconjugation
(iv) \(CH_3-\overset{\oplus}{C}H-CH_3\)	(d) A secondary carbocation

(i) → (a), (b), (d) (ii) → (d) (iii) → (b) (iv) → (c), (d)

(i) → (a), (c), (d) (ii) → (b) (iii) → (b) (iv) → (c), (d)

(i) → (a), (b), (d) (ii) → (b) (iii) → (b) (iv) → (c), (d)

(i) → (c), (b), (d) (ii) → (b) (iii) → (b) (iv) → (a), (d)

Question 8
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In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Components of a mixture of red and blue inks can be separated by distributing the components between stationary and mobile phases in paper chromatography.

Reason (R): The colored components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases.

A
Both A and R are correct and R is the correct explanation of A

B
Both A and R are correct but R is not the correct explanation of A

C
Both A and R are not correct

D
A is not correct but R is correct

Question 9
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The branch of chemistry which deals with the separation, identification and quantitative determination of the composition of different substances is called.......... chemistry.

A
Organic

B
Inorganic

C
Analytical

D
Bio

Question 10
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......... chemistry deals with the chemistry of elements other than carbon and of their compounds.

A
Organic

B
Inorganic

C
Physical

D
Bio

Submit Test

Column I	Column II
(i) Free radical	(a) Trigonal planar
(ii) Carbocation	(b) Pyramidal
(iii) Carbanion	(c) Linear

Organic Chemist...

Question 1

\(^*CH_3-CH_2-Cl\)

\(^*CH_3-CH_2-Mg^+Cl^-\)

\(^*CH_3-CH_2-Br\)

\(^*CH_3-CH_2-CH_3\)

Question 2

\(CH_3-\overset{\overset{O}{||}}{C}-O^-\)

\(Cl-CH_2-\overset{\overset{O}{||}}{C}-O^-\)

\(F-CH_2-\overset{\overset{O}{||}}{C}-O^-\)

\(^{^F\backslash}_{_F/}CH-\overset{\overset{O}{||}}{C}-O^-\)

Question 3

(i),(ii)

(ii),(iii)

(iii),(iv)

(i),(iv)

Question 4

(i) → (a), (ii) → (c) (iii) → (b)

(i) → (a), (ii) → (a) (iii) → (b)

(i) → (a), (ii) → (a) (iii) → (c)

(i) → (c), (ii) → (a) (iii) → (b)

Question 5

(i),(iv)

(ii),(iii)

(i),(iii)

(i),(ii)

Question 6

Both A and R are correct and R is the correct explanation of A

Both A and R are correct but R is not the correct explanation of A

Both A and R are not correct

A is not correct but R is correct

Question 7

(i) → (a), (b), (d) (ii) → (d) (iii) → (b) (iv) → (c), (d)

(i) → (a), (c), (d) (ii) → (b) (iii) → (b) (iv) → (c), (d)

(i) → (a), (b), (d) (ii) → (b) (iii) → (b) (iv) → (c), (d)

(i) → (c), (b), (d) (ii) → (b) (iii) → (b) (iv) → (a), (d)

Question 8

Both A and R are correct and R is the correct explanation of A

Both A and R are correct but R is not the correct explanation of A

Both A and R are not correct

A is not correct but R is correct

Question 9

Organic

Inorganic

Analytical

Bio

Question 10

Organic

Inorganic

Physical

Bio

User

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