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Students can access CBSE Class 12 Chemistry answer key 2024 here and evaluate their tentative marks in the February 27 exam. The answer key is provided for all question paper sets.
CBSE Class 12 Chemistry Answer Key 2024 (Image Credit: Pexels)CBSE Class 12 Chemistry Answer Key 2024: Students can check answers to all the questions of CBSE Class 12 Chemistry examination conducted on February 27, 2024. The Chemistry paper comprised a total of 33 questions of 70 marks. The students can find answer keys for Section A (multiple choice questions) of different paper codes on this page. For the rest of the sections (descriptive questions), the marking will depend on the content written by the student as well as the style of writing.
Also Read | CBSE Class 12 Result Expected Release Date 2024
CBSE Class 12 Chemistry Answer Key 2024
The answers to all the questions and sub-questions of Sections A and C are available for Class 12th students below.
Answer keys available for: i. Set Code: 56/3/3, ii. Set Code: 56/1/1, iii. Set Code: 56/5/3, iv. Set Code: 56/5/2, and v. Set Code: 56/2/1.
CBSE Class 12 Chemistry Answer Key 2024 Set Code: 56/3/3
Section A comprises 16 multiple-choice questions of 1 mark each, the answers to which for QP Code: 56/3/3 are provided here in tabular format.
| Question Number | QP Code: 56/3/3 |
|---|---|
| 1. Which of the following ligands is an ambidentate ligand? | (B) SCN – |
| 2. On adding AgNO 3 solution to 1 mole of CoCl 3 . 4NH 3 , one mole of AgCl is precipitated. The secondary valency of Co is: | (A) 6 |
| 3. Which of the following elements of 3d series of transition elements has the lowest ∆ a H°? | (D) Zn |
| 4. The major product obtained in the given reaction is: | (B) CH 2 –Cl–C 6 H 6 –OH |
| 5. Which of the following Grignard reagent will be used with methanal to prepare C 6 H 6 –CH 2 –OH? | (A) C 6 H 6 –CH 2 MgBr |
| 6. CH3-O-CH3 when treated with excess HI gives | (C) 2CH3–I |
| 7. Which of the following compounds will not react with benzene sulphonyl chloride? | (A) (C 2 H 5 ) 3 N |
| 8. Scurvy' is caused by the deficiency of vitamin: | (C) C |
| 9. A 1% solution of solute 'X' is isotonic with a 6% solution of sucrose (molar mass = 342 g mol -1 ). The molar mass of solute 'X' is: | (B) 57 g mol -1 |
| 10. The half life of a first order reaction with rate constant (k) of 3 min -1 is: | (D) 0.231 min |
| 11. Which of the following cell is used in hearing aids? | (B) Mercury cell |
| 12. Aniline on reaction with Bromine water gives: | (B) 2,4,6-tribromoaniline |
|
13. Assertion (A): ∆mix H and ∆mix V are zero for an ideal solution.
Reason (R): The solution which obeys Raoult's law over the entire range of concentration is called an ideal solution. | (A) Both A and R are true and R is the correct explanation of A |
|
14. Assertion (A): Rate of reaction decreases with increase in temperature.
Reason (R): Number of effective collisions increases with increase in temperature. | (A) Both A and R are true and R is the correct explanation of A |
|
15. Assertion (A): Phenol on reaction with aqueous NaOH gives sodium phenoxide.
Reason (R): This reaction supports the acidic nature of phenol | (A) Both A and R are true and R is the correct explanation of A |
|
16. Assertion (A): Boiling point of butan-1-ol is higher than that of butan-1-amine.
Reason (R): Being more polar, butan-1-ol forms intermolecular hydrogen bonds butan-1-amine. | (A) Both A and R are true and R is the correct explanation of A |
CBSE Class 12 Chemistry Answer Key 2024 Set Code: 56/1/1
Section A comprises 16 multiple-choice questions of 1 mark each, the answers to which for QP Code: 56/1/1 are provided here in tabular format.
| Question | QP Code: 56/1/1 |
|---|---|
| 1. Which one of the following first row transition elements is expected to have the highest third ionization enthalpy? | (D) Vanadium (Z = 23) |
| 2. Which of the following compounds will give a ketone on oxidation with chromic anhydride (CrO 3 )? | (D) CH 3 –CH 2 –(CH–OH)–CH 3 |
| 3. Two among the three components of DNA are beta-D 2-deoxyribose and a heterocyclic base. The third component is: | (A) Adenine |
| 4. For an electrolyte undergoing association in a solvent, the van't Hoff factor | (A) is always greater than one |
| 5. For the reaction X + 2Y → P. the differential form equation of the rate | (A) 2d[P]/dt = -d[Y]/dt |
| 6. The compound which undergoes SN1 reaction most rapidly is | To be updated |
| 7. Acetic acid reacts with PCl 5 to give: | (C) CH 3 –COCl |
| 8. The formation of cyanohydrin from an aldehyde is an example of : | (C) nucleophilic reaction |
| 9. In the Arrhenius equation, when log k is plotted against 1/T, a straight line is obtained whose : | (D) slope is -E a /2.303R and intercept is log A. |
| 10. The reaction of an alkyl halide with sodium alkoxide forming ether in known as: | (C) Williamson synthesis |
| 11. The correct order of the ease of dehydration of the following alcohols by the action of conc. H 2 SO 4 is: | (A) (CH 3 ) 3 C–OH > (CH 3 ) 2 CH–OH > CH 3 CH 2 –OH |
| 12. Which functional groups of glucose interact to form cyclic hemiacetal leading to pyranose structure? | (A) Aldehyde group and hyroxyl group at C–4 |
CBSE Class 12 Chemistry Answer Key 2024 Set Code: 56/5/3
Section A comprises 16 multiple-choice questions of 1 mark each, the answers to which for QP Code: 56/5/3 are provided here in tabular format.
| Question Number | QP Code: 56/5/3 |
|---|---|
| 1. Van't Hoff factor for K 2 SO 4 solution, assuming complete ionization is | (B) 3 |
| 2. Dilution affects both conductivity as well as molar conductivity. Effect of dilution on both is as follows: | (C) conductivity increases whereas molar conductivity decreases |
| 3. Which of the following species can act as the strongest base? | (C) RO – |
| 4. In which of the following molecules, C atom marked with asterisk is chiral? | (A) I, II, III |
| 5. The rate of a reaction increases sixteen times when the concentration of the reactant increases four times. The order of the reaction is | (B) 2.0 |
| 6. Which of the following cell is used in hearing aids? | (A) Mercury cell |
| 7. Isotonic solutions have the same | (C) Osmotic pressure |
| 8. Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal | (A) more hard |
| 9. Auto-oxidation of chloroform in air and light produces a poisonous gas known as | (C) Phosgene |
| 10. Out of the following alkenes, the one which will produce tertiary butyl alcohol on acid catalysed hydration is | (D) (CH 3 ) 2 C = CH 2 |
| 11. The correct name of the given reaction is | (A) Sandmeyer's Reaction |
| 12. The specific sequence in which amino acids are arranged in a protein is called its | (A) Primary Structure |
|
13. Assertion (A): The units of rate constant of a zero order reaction and rate of reaction are the same.
Reason (R) : In zero order reaction, the rate of reaction is independent of the concentration of reactants. | (C) A is true but R is false. |
|
14. Assertion (A): Zr and Hf are of almost similar atomic radii.
Reason (R): This is due to Lanthanoid contraction. | (A) Both A and R are true and R is the correct explanation of A |
|
15. Assertion (A): p-methoxyphenol is a stronger acid than m-methoxy phenol,
Reason (R): Methoxy group exerts +R effect at both ortho and para position. | (D) A is false but R is true. |
| 16. | To be updated |
CBSE Class 12 Chemistry Answer Key 2024 Set Code: 56/5/2
Section A comprises 16 multiple-choice questions of 1 mark each, the answers to which for QP Code: 56/5/2 are provided here in tabular format.
| Question Number | QP Code: 56/5/2 |
|---|---|
| 1. Which of the following species can act as the strongest base? | (C) RO – |
| 2. Auto-oxidation of chloroform in air and light produces a poisonous gas known as | (C) Phosgene |
| 3. Isotonic solutions have the same | (C) Osmotic pressure |
| 4. The specific sequence in which amino acids are arranged in a protein is called its | (A) Primary Structure |
| 5. Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal | (A) more hard |
| 6. The correct name of the given reaction | (D) Gatterman reaction |
| 7. | To be updated |
| 8. Van’t Hoff factor for KCI solution assuming the complete dissociation is | (B) 2 |
| 9. Dilution affects both conductivity as well as molar conductivity. Effect of dilution on both is as follows: | (B) conductivity increases whereas molar conductivity decreases |
CBSE Class 12 Chemistry Answer Key 2024 Set Code: 56/2/1
Section A comprises 16 multiple-choice questions of 1 mark each, the answers to which for QP Code: 56/2/1 are provided here in tabular format.
| Question Number | QP Code: 56/2/1 |
|---|---|
| 1. When MnO 2 is fused with KOH in air, it gives: | (B) K 2 MnO 4 |
| 2. Ligand EDTA is an example of a: | (D) Polydentate ligand |
| 3. Which of the following ligand forms chelate complex? | (A) C 2 O 4 2- |
| 4. Which of the following contains sp 2 hybridised carbon bonded to X ? | (C) CH 2 = CH–X |
| 5. Which of the following is most acidic? | (D) Cl–C 6 H 6 –OH |
| 6. Anisole reacts with HI to give : | (A) C 6 H 6 –OH + CH 3 –I |
| 7. Ethanol on heating with cone, H 2 SO 4 at 413 K gives | (C) C 2 H 5 –O–C 2 H 5 |
| 8. An azeotropic solution of two liquids has boiling point lower than either of them when it: | (B) shows positive deviation from Raoult's law |
| 9. The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0225. The mole fraction of the non-volatile solute is : | (D) 0.0225 |
| 10. During electrolysis of aqueous solution of NaCl : | (A) H 2 (g) is liberated at cathode |
| 11. Nucleophilic addition of Grignard reagent to ketones followed by hydrolysis with dilute acids forms | (A) Tertiary alcohol |
|
12. Match the reagents required for the given reactions:
I. Oxidation of primary alcohols to NaBH, aldehydes II. Butan-2-one to Butan-2-ol III. Bromination of Phenol to 2, 4, 6- Tribromophenol IV. Dehydration of propan-2-ol to propene (p) NaBH4 (q) 85% phosphoric acid at 440 K (r) PCC (s) Bromine water | (A) I – (r), II – (p) III – (s), IV – (q) |
CBSE Class 12 Chemistry 2024: Analysis and Question Paper
The analysis and question paper for CBSE Class 12 Chemistry 2024 held on February 27, 2024, can be checked at the following links:
CBSE Class 12 Answer Key 2024 Links |
The question papers for the respective day-wise exams are available at the links below:
CBSE Class 12 2024 Weightage Subject-Wise |
Access CBSE Class 12 weightage 2024 for the upcoming papers here in the given table:
| Subject | Weightage Link |
|---|---|
| Geography | CBSE Class 12 Geography Weightage 2024 |
| Physics | CBSE Class 12 Physics Weightage 2024 |
| Mathematics | CBSE Class 12 Mathematics Weightage 2024 |
| Home Science | CBSE Class 12 Home Science Weightage 2024 |
| Psychology | CBSE Class 12 Psychology Weightage 2024 |
| Economics | CBSE Class 12 Economics Weightage 2024 |
| Biology | CBSE Class 12 Biology Weightage 2024 |
| Political Science | CBSE Class 12 Political Science Weightage 2024 |
| Accountancy | CBSE Class 12 Accountancy Weightage 2024 |
| Business Studies | CBSE Class 12 Business Studies Weightage 2024 |
| History | CBSE Class 12 History Weightage 2024 |
| Sociology | CBSE Class 12 Sociology Weightage 2024 |
| Computer Science | CBSE Class 12 Computer Science Weightage 2024 |
| Informatics Practices | CBSE Class 12 Informatics Practices Weightage 2024 |
