2nd PUC Chemistry Answer Key 2025 Karnataka (Available): Unofficial key PDF download
Aspirants can check and download the unofficial 2nd PUC Chemistry Answer Key 2025 Karnataka for all short answer questions here. The 2nd PUC Chemistry 2025 paper was held on March 12.
2nd PUC Chemistry Answer Key 2025 Karnataka: Aspirants can download the unofficial 2nd PUC Chemistry Answer Key 2025 Karnataka for all short answer questions on this page. The 2nd PUC Chemistry exam was scheduled for March 12, 2025 . Overall, the question paper is divided into five parts, where all parts are compulsory to attempt. This answer key will enable students to verify their answers and estimate their scores. The unofficial answer key will be available for Part A Questions 1 and 2 comprising multiple choice questions and fill-in-the-blanks and Part B Question 3 comprising short answer type questions. The solutions of other parts will not be available as answering such questions varies from student to student and depends on their style of writing. By downloading the answer key, students can assess their performance and identify areas for improvement.
2nd PUC Chemistry Answer Key 2025 Karnataka
Aspirants can check the unofficial answer key for the Karnataka 2nd PUC Chemistry 2025 exam in the table below.
Part A Question 1 (Select the correct option)
Each question in Part A carries 1 marks with overall weightage of 20 marks.
Questions | 2nd PUC Chemistry Answer Key 2025 Karnataka |
1. Incorrect statements regarding vitamins. | (b) Most of the groups contain amino groups |
| 2. Camphor in nitrogen gas, is an example of | (c) gaseous solution |
| 3. Which of the following is not a subdivision of structural isomerism? | (d) Geometrical isomerism |
| 4. Cumene hydroperoxide on hydrolysis with dilute acid gives | (c) phenol and acetone |
| 5. An example for pseudo-first-order reaction is | (c) inversion of cane sugar |
| 6. The TUPAC name of | (a) sp 3 |
| 7. The hytridisation of Nato in trimethyl amines | (c) 3-bromobutanal |
| 8. Select non-semiconductor from the following | (c) gallium arsenid |
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9. Given below are two stalements:
Statement : Ammonolysis of alkyl halides has the disadvantage of yielding a midure of primary, secondary, tertiary amines and quaternary ammonium salt. Statement II: Tertiary amine is obtained as a major product by taking Large excess of ammonia in ammonolysis of alkyl halides. In the light of the above statements, choose the appropriate answer from the options given below: | (b) Both Statement I and Statement II are correct |
| 10. The structure of pentacarbonyliron(0) is. | (d) square pyramidal |
| 11. Two compounds 'A' and 'B' were being tested for their boiling points. It was observed that 'A' started boiling after 'B', when both were subjected to same conditions. If the compound 'B' is acetone, which of the following can be compound 'A'? | (b) Propan-1-ol |
| 12. Select the correct order of melting points of isomeric dichlorobenzenes. | (c) p-dichlorobenzene > o-dichlorobenzene >m-dichlorobenzene |
| 13. Match the following with correct options | (d) i (C) ii (A) iii (D) iv (B) |
| 14. Which of the following explains the increase in the reaction rate by a catalyst? | (c) catalyst provides an alternative pathway by reducing the active energy between the reactants and products. |
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15. Sufficient amount of 2-methylpropan-2-ol heated with 20% phosphoric acid at 358 K gives main product 'X' with the elimination of water and tert-butyl alcohol undergoes dehydration when it is passed over heated copper at 573 K gives Y
Pick the correct staternent regarding X and Y. | (c) The boiling point of 'X 'is lesser than the boiling point of 'Y'. |
Question 2 Fill in the Blanks
Questions | 2nd PUC Chemistry Answer Key 2025 Karnataka |
16. Arrhenius factor is also called ___________ factor | Pre-exponential |
| 17. Paramagnetism arised from the presence of __________electrons | Unpaired |
| 18. _________ is one of the most common freon in industrial use. | CCl 2 F 2 |
| 19. The electrophilic attack of H,O" on alkene forms __________ | Carbocation |
| 20. The hormone glucorticoids control the ___________ metabolism | Carbohydrate |
Part B Question 3
Each question in Part A carries 2 marks with overall weightage of 6 marks.
Questions | 2nd PUC Chemistry Answer Key 2025 Karnataka |
21. Explain Wurtz reaction with suitable chemical equation. | The general chemical equation is: 2R-X + 2Na → R-R + 2NaX, where R represents an alkyl group and X a halogen. |
| 22. Molarity (M), molality (m) and mole fraction (x) are some methods for expressing concentration of solutions. Which of these are temperature dependent? Give Reason. | mole fraction: it is the ratio of number of moles of particular component through the total number of moles of all the components present in the solution. |
| 23. What are non essential amino acids? Name an optically inactive naturally occurring α-amino acid | Non-essential amino acids are those the body can synthesize, while the only naturally occurring, optically inactive α-amino acid is glycine. |
| 24. Write any two characteristic properties of interstitial compounds |
(I) They have high melting points, higher than those of pure metals.
(II) They are very hard. |
| 25) While separating a mixture of ortho and para nitrophenols by s distillation, name the isomer which will be steam volatile. Give reason. | In a mixture of ortho- and para-nitrophenols, ortho-nitrophenol (o-nitrophenol) will be steam volatile because of the presence of intramolecular hydrogen bonding (chelation) while p-nitrophenol has intermolecular hydrogen bonding |
2nd PUC Karnataka Chemistry Exam Analysis 2025 Link
Candidates can check out the Karnataka 2nd PUC Chemistry Exam Analysis 2025 by clicking here:
2nd PUC Answer Key 2025 Karnataka Subject-Wise |
| Subject | Answer Key Link |
| Mathematics | 2nd PUC Mathematics Answer Key 2025 Karnataka |
| Business Studies | 2nd PUC Business Studies Answer Key 2025 Karnataka |
| Political Science | 2nd PUC Political Science Answer Key 2025 Karnataka |
| History | 2nd PUC History Answer Key 2025 Karnataka |
| Physics | 2nd PUC Physics Answer Key 2025 Karnataka |
| Accountancy | 2nd PUC Accountancy Answer Key 2025 Karnataka |
| Economics | 2nd PUC Economics Answer Key 2025 Karnataka |
| English | 2nd PUC English Answer Key 2025 Karnataka |
| Geography | 2nd PUC Geography Answer Key 2025 Karnataka |
| Biology | 2nd PUC Biology Answer Key 2025 Karnataka |
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