If you are a Bihar Board Class 12th Chemistry student preparing for the 2024 exam, this blog will be beneficial for you. In this post, you are provided with the Download Class 12 Chemistry Previous Year Questions 2024 – With Easy Explanations (Part 2) with Solutions, which will further strengthen your preparation.
Class 12 Chemistry Previous Year Questions 2024
1. Milk is
(A) fat dispersed in water
(B) water dispersed in fat
(C) water dispersed in oil
(D) fat dispersed in fat
Answer: fat dispersed in water
2. Which of the following is a lyophilic colloid?
(A) Milk
(B) Gum
(C) Fog
(D) Blood
Answer: gum
3. Which of the following catalysts is used in the manufacture of ammonia by Haber’s process?
(A) Al₂O₃
(B) Fe + Mo
(C) CuO
(D) Pt
Answer: Fe + Mo
3. With which of the following does acetic acid not form acetyl chloride?
(A) PCl₅
(B) PC13
(C) SOCI2
(D) Cl₂
Answer: Cl₂
4. Acetamide is
(A) Acidic
(B) Alkaline
(C) Amphoteric
(D) Neutral
Answer: amphoteric
5. CH3-C(CH3)(CH3)-NH2 is a
(A) Primary amine
(C) Tertiary amine
(B) Secondary amine
(D) Quaternary salt
Answer: primary amine
6. Methylamine, on heating with chloroform and alcoholic KOH, gives
(A) CH₂OH
(B) CH₃CN
(C) CH₃CHO
(D) CH₃NC
Answer: CH₃CN
7. Which of the following is the most basic?
(A) C6H5NH2
(B) (C6H5)2NH
(C) C₂H₅NH₂
(D) (C₂H₅)₂NH
Answer: (C₂H₅)₂NH
8. The helical structure of protein is stabilized by which of the following?
(A) Ionic bond
(B) Covalent bond
(C) van der waals forces
(D) Hydrogen bond
Answer: Hydrogen bond
9. Which of the following is a ketohexose?
(A) Glucose
(B) Fructose
(C) Sucrose
(D) STARCH
Answer: fructose
10. Which of the following is the molecular formula of orthophosphoric acid?
(A) H₃PO₃
(B) H₃PO₄
(C) HPO₃
(D) H4P207
Answer: H₃PO₄
11. The structure of XeF₄ is
(B) Octahedral
(C) Square planar
(D) None of these
Answer: square planar
12. Which of the following halogens does not exhibit a positive oxidation state?
(A) Tetrahedral
(A) I
(B) Br
(C) Cl
(D) F
Answer: F
13. Which of the following has the smallest bond angle?
(A) H₂O
(B) H₂S
(C) H₂Se
(D) H₂Te
Answer: H₂Te
14. Which of the following has the maximum number of unpaired electrons?
(A) MG2+
(B) Ti³⁺
(C)V3+
(D) Fe³⁺
Answer: Fe³+
15. The maximum oxidation state of chromium is
(A)+2
(B) 3+
(C) 4+
(D) 6+
Answer: +6
16. The number of unpaired electrons in Cu
ion (Z = 29)
(A) 0
(B) 1
(C) 2
(D) 3
Answer: 3
17. Isotonic solutions have the same
(A) Normality
(B) Strength
(C) Density
(D) Molar concentration
Answer: molecular concentration
18. An azeotropic mixture of HCL and H₂O has
(A) 48% HCl
(B) 36% HCL
(C) 22.2% HCl
(D) 20.2% HCI
Answer: 20.2% HCL
19. A charge of 96500 coulombs liberates… from the solution of CuSO₄.
(A) 63.5 gm copper
(B) 31.76 gm copper
(C) 96500 gm copper
(D) 100 gm copper
Answer: 31.76 gm copper
20. The cell constant of a conductivity cell is
(A) L/A
(B) A/L
(C) L. A
(D) R/A
Answer: L/A
21. The electromotive force of the cell Zn | ZnSO₄ || CuSO₄ | Cu is 1.1 volts. Its cathode is
(A) Zn
(B) Cu
(C) ZnSO₄
(D) CuSO₄
Answer: Cu
22. Who gave the theory of ionization?
(A) Faraday
(B) Arrhenius
(C) Ostwald
(D) Rutherford
Answer: Arrhenius
23. The rate of reaction of a substance depends upon
(A) Atomic mass
(B) Equivalent mass
(C) Molecular mass
(D) Active mass
Answer: Active mass
24. A vitamin that plays a vital role in the coagulation property of blood is
(A) Vitamin A
(B) Vitamin D
(C) Vitamin E
(D) Vitamin K
Answer: Vitamin K
25. Chloramine-1 is an
(A) Disinfectant
(B) Antiseptic
(C) Analgesic
(D) Antipyretic
Answer: Disinfectant
26. Hydrazine is a drug that is used in the treatment of which of the following?
(A) Malaria
(B) Typhoid
(C) Cholera
(D) Tuberculosis
Answer: Tuberculosis
27. Which of the following is an alkaloid?
(A) Nicotine
(B) Atropine
(C) Cocaine
(D) All of these
Answer: All of these
28. Which of the following is a natural rubber?
(A) Isoprene
(B) Nitrocellulose
(C) Polyethylene
(D) Bakelite
Answer: Isoprene
29. A raw material used in making nylon is
(B) butadiene
(C) adipic acid
(A) ethylene
(D) isoprene
Answer: Adipic acid
30. F2C=CF2 is a monomer of which of the following?
(A) Teflon
(B) Glyptal
(C) Nylon-6
(D) Buna-S
Answer: Teflon
31. Which of the following metals is generally found in the free state?
(A) Cu
(B) Au
(C) Al
(D) Fe
Answer: Au
32. Which of the following statements is true?
(A) All ores are minerals
(B) All minerals are ores
(C) A mineral cannot be an ore
(D) An ore cannot be a mineral
Answer: All ores are minerals
33. Electrometallurgical process is used for the extraction of which of the following
(A) Iron
(B) Lead
(C) Silver
(D) Sodium
Answer: sodium
34. An ore having two different metal atoms is
(A) Haematite
(B) Galena
(C) Magnetite
(D) Copper pyrite
Answer: copper Pyrite
Download BSEB Class 12 Chemistry 2024: Paper and Step‑by‑Step Solutions (Part 2)
Disclaimer: The questions and answers used in this post are taken from the book “Golden Publication”. We give credit to Golden Publication for this, and this blog has been created for educational purposes only.
BSEB 12th Physics 2024 Questions, Last Year’s Paper (Part 2)