NEET 2025 Chemistry Past Paper PDF

For NEET-2025 Corp. Office :Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph.011-47623456 Poll CHEMISTRY: (C-02) Syllabus:...

For NEET-2025 Corp. Office :Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph.011-47623456 Poll CHEMISTRY: (C-02) Syllabus: Hydrocarbons ( ) Choose the correct answer. 1. 1. (1) 30 g/mol (2) 28 g/mol (1) 30 g/mol (2) 28 g/mol (3) 26 g/mol (4) 105 g/mol (3) 26 g/mol (4) 105 g/mol Hg2 /H Isomerisation 2. CH3–C CH + H2O 2 Hg /H (X) leko;ohdj.k (Y) 2. CH3–C CH + H2O 333 K (X) (Y) 333 K compound (Y) is (Y) (1) CH3CH2CH2OH (2) CH3COCH3 (1) CH3CH2CH2OH (2) CH3COCH3 (3) CH3C(OH)=CH2 (4) CH3CH2CHO (3) CH3C(OH)=CH2 (4) CH3CH2CHO 3. HCC-069 In the following reaction HCC-069 HCC-069 HCC-069 3. The major product ‘A’ is ‘A’ (1) (2) (1) (2) (3) (4) (3) (4) 4. Given below are two statements: 4. : Statement I: The repulsive interaction between I: , the electron clouds, which affects stability of a , conformation is called torsional strain. Statement II: Magnitude of torsional strain depends upon the angle of rotation about II: C-C C-C bond. In the light of above statements, choose the most , appropriate answer from the options given below [Page 1] Poll-02 Chemistry (1) Statement I is incorrect but statement II is (1) I II correct (2) I II (2) Statement I is correct but statement II is incorrect (3) I II (3) Both statement I and statement II are incorrect (4) I II (4) Both statement I and statement II are correct 5. C6H5–CH2CH=CH2 HBr 5. The reaction of C6H5–CH2CH=CH2 with HBr produces majorly (1) (1) (2) (2) (3) C6H5–CH2–CH2–CH2–Br (3) C6H5–CH2–CH2–CH2–Br (4) C6H5–CH2–CH2–CH3 (4) C6H5–CH2–CH2–CH3 6. , 6. In the following reaction, The major product A is a/an A (1) Primary alcohol (2) Secondary alcohol (1) (2) (3) Tertiary alcohol (4) Ether (3) (4) 7. Which of the following is not a HCC-069 HCC-069 possible product of HCC-069 HCC-069 acid catalyzed dehydration of ? 7. ? (1) (2) (1) (2) (3) (4) 8. A single compound with the given structure (3) (4) 8. ‘A’ is obtained by reductive ozonolysis of an alkene ‘A’. Alkene ‘A’ will be ‘A’ (1) (2) (1) (2) (3) (4) (3) (4) [Page 2] Chemistry Poll-02 9. In the following reactions, 9. , (A) (B) The major products (A) and (B) respectively are (1) Butane-2, 3-diol, Ethanoic acid (1) -2, 3- , (2) Butane-1, 2-diol, Ethanoic acid (2) -1, 2- , (3) Ethanal, Ethanoic acid (3) , (4) Butanoic acid, Butane-1, 4-dial (4) , -1, 4- 10. The most suitable reagent for the following conversion is 10. CH3–C C–CH3 CH3–C C–CH3 (1) Zn/HCl (1) Zn/HCl (2) Hg2+/H+, H2O (2) Hg2+/H+, H2O (3) H2, Pd/C, quinoline (3) H2, Pd/C, (4)HCC-069 Na/liquid NH3 HCC-069 HCC-069 HCC-069 11. Which one is the correct order of acidity of H (4) Na/ NH3 atoms? 11. H ? (1) CH3–CH3 > CH2=CH2 > CH3–C CH > CH CH (1) CH3–CH3 > CH2=CH2 > CH3–C CH > CH CH (2) CH CH > CH3–C CH > CH2=CH2 > CH3–CH3 (2) CH CH > CH3–C CH > CH2=CH2 > CH3–CH3 (3) CH CH > CH3–C CH > CH3–CH3 > CH2 CH2 (3) CH CH > CH3–C CH > CH3–CH3 > CH2 CH2 (4) CH CH > CH2 CH2 > CH3–C CH > CH3–CH3 12. The major product B obtained in the following (4) CH CH > CH2 CH2 > CH3–C CH > CH3–CH3 reaction sequence is 12. B HBr CH3–CH2–C CH + HCl A B CH3–CH2–C CH + HCl A HBr B (1) (1) (2) (2) (3) (3) (4) (4) [Page 3] Poll-02 Chemistry 13. Which compound amongst the following is not an 13. ? aromatic compound? (1) (2) (1) (2) (3) (4) (3) (4) 14. -I -II 14. Match the List-I with List-II List I (Reaction) List-II -I ( ) -II (Major ( ) product) (a) (i) (a) (i) (b) (ii) (b) (ii) (c) (iii) (c) (iii) (d) (iv) (d) (iv) HCC-069 HCC-069 HCC-069 HCC-069 : Choose the correct answer from the options given (1) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) below: (1) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) (2) (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv) (2) (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv) (3) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) (3) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) (4) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i) (4) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i) 15. 15. Which amongst the following aromatic compound ? gives fastest electrophilic substitution? (1) (2) (1) (2) (3) (4) (3) (4) 16. ( 16. Total number of monochloro derivates (only structural isomers) of methyl cyclohexane is ) (1) 3 (2) 4 (1) 3 (2) 4 (3) 5 (4) 6 (3) 5 (4) 6 [Page 4] Chemistry Poll-02 17. Total number of alkenes which on hydrogenation 17. 2- give 2-methylbutane is (1) 3 (2) 2 (1) 3 (2) 2 (3) 4 (4) 1 (3) 4 (4) 1 18. Given below are two statements: One is labelled as 18. : (A) Assertion (A) and other is labelled as Reason (R). (R) Assertion(A): The boiling points of three isomeric pentanes follows the order n-pentane > isopentane > neopentane. (A): n- > > Reason (R): When branching increases, the molecule attains a shape of sphere. This results in (R): , smaller surface area of contact, due to which the intermolecular forces between the spherical , - molecules are weak, therefore lowering the boiling , points. In the light of above statements, choose the most , appropriate answer from the options given below. (1) Both (A) and (R) are true and (R) is the correct (1) (A) (R) (R), (A) explanation of (A) (2) Both (A) and (R) are true but (R) is not the (2) (A) (R) (R), (A) correct explanation of (A) (3) (A) is true but (R) is false (3) (A) (R) HCC-069 (4) (A) is false but (R) is true HCC-069 HCC-069 HCC-069 (4) (A) (R) 19. Which of the following alkanes cannot be prepared 19. in good yield by Wurtz reaction? ? (1) n-butane (2) 2, 3-dimethylbutane (1) n- (2) 2, 3- (3) n-hexane (4) n-pentane (3) n- (4) n- 20. Consider the following statements: 20. : (a) The rate of reaction of alkanes with halogens is (a) F2 > F2 > Cl2 > Br2 > I2. Cl2 > Br2 > I2 (b) In halogenation, the rate of replacement of (b) , hydrogens of alkanes is 1° > 2° > 3°. 1° > 2° > 3° (c) Fluorination of alkanes is too violent to be (c) controlled. Choose the correct statements. (1) (a) and (b) only (2) (b) and (c) only (1) (a) (b) (2) (b) (c) (3) (a) and (c) only (4) (a), (b) and (c) (3) (a) (c) (4) (a), (b) (c) [Page 5]