Organic Chemistry — NEET Chemistry practice

Question 1

Benzene does not undergo addition reactions easily because:

Accepted Answer

Its resonance-stabilised (aromatic) system must be preserved

Answer

It has six hydrogen atoms

Answer

It has a cyclic structure

Answer

Its double bonds are strong

Question 2

Neopentyl bromide reacts with sodium ethoxide in ethanol. The major substitution product is:

Accepted Answer

CH₃CH₂C(CH₃)₂OC₂H₅

Answer

(CH₃)₃CCH₂OC₂H₅

Answer

CH₃CH(OC₂H₅)CH(CH₃)₂

Answer

(CH₃)₂CHCH₂CH₂OC₂H₅

Question 3

Cl–(CH₂)₄–Cl reacts with excess NH₃ to give A. A with NaOH gives B + H₂O + NaCl. B is:

Accepted Answer

H₂N–(CH₂)₄–NH₂

Answer

H₂N–(CH₂)₄–OH

Answer

HO–(CH₂)₄–OH

Answer

H₃N⁺–(CH₂)₄–N⁺H₃

Question 4

Compound A reacts with Na metal to give B. A also reacts with PCl₅ to give C. B and C react together to give dimethyl ether. A, B and C are respectively:

Accepted Answer

CH₃OH, CH₃ONa, CH₃Cl

Answer

CH₃OH, CH₃ONa, CH₃COCl

Answer

CH₃OH, CH₄, CH₃Cl

Answer

CH₃Cl, CH₄, CH₃OH

Question 5

Read Statement A and Statement B carefully and choose the correct option. Statement A: Pure aniline and other arylamines are usually colourless. Statement B: Arylamines get coloured on storage due to atmospheric reduction.

Accepted Answer

Statement A is true, but Statement B is false.

Answer

Both Statement A and Statement B are true.

Answer

Statement A is false, but Statement B is true.

Answer

Both Statement A and Statement B are false.

Question 6

C₆H₅–CH(OH)–CH(CH₃)–CH₂–CHO is heated with Zn(Hg)/conc. HCl. Possible products: A) C₆H₅–CH(OH)–CH(CH₃)–C₂H₅; B) C₆H₅–CH=C(CH₃)–C₂H₅; C) C₆H₅–C(CH₃)=CH–C₂H₅; D) a 2-phenyl-3-methyltetrahydrofuran. The major product is:

Accepted Answer

B only

Answer

D only

Answer

C only

Answer

A only

Question 7

Read Statement A and Statement B carefully and choose the correct option. Statement A: Differential extraction separates the components of a mixture on the basis of their different boiling points. Statement B: Differential extraction is based on the principle of differential solubility in two immiscible solvents.

Accepted Answer

Statement A is false, but Statement B is true.

Answer

Both Statement A and Statement B are true.

Answer

Statement A is true, but Statement B is false.

Answer

Both Statement A and Statement B are false.

Question 8

Match each reaction (Column I) with its major product (Column II). Column I: CH₃CH=CH₂ + HI; Ethylbenzene + Br₂, heat/light; Styrene (C₆H₅CH=CH₂) + HBr Column II: 1-Bromo-2-phenylethane; 1-Iodopropane; 2-Iodopropane; 1-Bromo-1-phenylethane

Accepted Answer

A→R, B→S, C→S

Answer

A→Q, B→P, C→S

Answer

A→R, B→P, C→P

Answer

A→Q, B→S, C→P

Question 9

Read Statement A and Statement B carefully and choose the correct option. Statement A: The SN2 mechanism involves a backside attack by the nucleophile. Statement B: In an SN2 reaction, the configuration at the carbon undergoing substitution remains the same.

Accepted Answer

Statement A is true, but Statement B is false.

Answer

Both Statement A and Statement B are true.

Answer

Statement A is false, but Statement B is true.

Answer

Both Statement A and Statement B are false.

Question 10

Read the Assertion and Reason carefully and choose the correct option. Assertion: Alkenes can be converted into aldehydes and ketones by ozonolysis. Reason: Ozonolysis of alkenes followed by reductive work-up (Zn/H₂O) produces aldehydes and/or ketones.

Accepted Answer

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.

Answer

Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.

Answer

Assertion is true, but Reason is false.

Answer

Assertion is false, but Reason is true.

Organic Chemistry: NEET practice questions

Choose how you want to practise

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