KCET Chemistry Answer Key 16 April 2025: The Karnataka Examination Authority (KEA) conducted the KCET Chemistry Examination 2025 today, April 16, 2025. The examination was held from 2:30 PM to 3:50 PM. The KCET Chemistry 2025 question paper had a weightage of 60 marks. Students who appeared for the KCET Chemistry 2025 examination and are eager to estimate their scores can access the unofficial KCET Chemistry Answer Key 16 April 2025 available here.
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KCET Chemistry Answer Key 16 April 2025: Questions and Answers
The KCET Chemistry 2025 questions and answers are given below.
| KCET April 16 Chemistry Questions 2025 | KCET Chemistry Answer Key 16 April 2025 |
|---|---|
| Question 1: For a given half cell, Al 3+ + 3e - → Al on increasing the concentration of aluminium ion, the electrode potential will | Increase |
| Question 2: Match the following and select the correct option for the quantity of electricity, in Cmol-¹, required to deposit various metals at cathode. | a-iii, b-iv, c-ii, d-i |
| Question 3: Catalysts are used to increase the rate of a chemical reaction. Because it | Decreases the activation energy of the reaction |
| Question 4: Half-life of a first order reaction is 20 seconds and initial concentration of reactant is 0.2M. The concentration of reactant left after 80 seconds is | 0.0125 M |
| Question 5: In the given graph, E a for the reverse reaction will be | 125 KJ |
| Question 6: For the reaction 2N 2 O 5(g) → 4NO 2(g) + O 2(g) initial concentration of N 2 O 5 is 2.0 mol L -1 and after 300 min. it is reduced to 1:4 mol L -1 . The rate of production of NO 2 (in mol L -1 min -1 ) is | 4 * 10 -3 |
| Question 7: Which of the following methods of expressing concentration are unitless? | Mole fraction and Mass percent (W/W) |
| Question 8: Select the INCORRECT statement/s from the following: (a) 22 books have infinite significant figures. (b) In the answer of calculation 2.5 × 1.25 has four significant figures. (c) Zero's preceding to first non-zero digit are significant. (d) In the answer of calculation 12.11 + 18.0+ 1.012 has three significant figures |
(b) and (c) only |
| Question 9: Given below are the atomic masses of the elements: Which of the following doesn't form triad? |
Cl, K, Ca |
| Question 10: The change in hybridisation (if any) of the 'Al' atom in the following reaction is AlCl 3 + Cl - → AlCl - 4 |
sp 2 to sp 3 |
| Question 11: Match List-I and List-II and select the correct option: (a) NO - (i) 1.5 (b) CO - (ii) 2.0 (c) O - 2 - (iii) 2.5 (d) O 2 - (iv) 3.0 |
a-iii, b-iv, c-i, d-ii |
| Question 12: The electronic configuration of X and Y are given below: X: 1s 2 2s 2 2p 6 3s 2 3p 3 Y: 1s 2 2s 2 2p 6 3s 2 3p 5 Which of the following is the correct molecular formula and type of bond formed between X and Y? |
XY 3 , covalent bond |
| Question 13: Match List-I with List-II | a-iii, b-iv, c-i, d-ii |
| Question 14: In the following pairs, the one in which both transition metal ions are colourless is | Sc 3+ , Zn 2+ |
| Question 15: In the reaction between hydrogen sulphide and acidified permanganate solution, | H 2 S is oxidised to S, MnO - 4 is reduced to Mn 2+ |
| Question 16: A member of the Lanthanoid series which is well known to exhibit +4 oxidation state is | Cerium |
| Question 17: In which of the following pairs, both the elements do not have (n-1) d 10 ns 2 configuration? | Ag, Cu |
| Question 18: A ligand which has two different donor atoms and either of the two ligates with the central metal atom/ion in the complex is called | Ambidentate ligand |
| Question 19: Which of the following statements are true about [NiCl¸] 2- ? (a) The complex has tetrahedral geometry. (b) Co-ordination number of Ni is 2 and oxidation state is +4. (c) The complex is sp 3 hybridised (d) It is a high spin complex. (e) The complex is paramagnetic. |
a, c, d and e |
| Question 20: Which formula and its name combination is incorrect? | [Co(NH 3 ) 5 , (CO 3 )]Cl, Pentaamine carbonylcobalt (III) chloride |
| Question 21: In the complex ion [Fe (C 2 O 4 ) 3 ] 3- , the Co-ordination number of Fe is | 6 |
| Question 22: Match List-I with List-II for the following reaction pattern. | a-iii, b-i, c-ii, d-iv |
| Question 23: The correct sequence of α-amino acid, hormone, vitamin, carbohydrates respectively is | Aspartic acid, Insulin, Ascorbic acid, rhamnose |
| Question 24: Which examples of carbohydrates exhibit α–link (α–glycosidic link) in their structure? | Amylose and Amylopectin |
| Question 25: In the titration of potassium permanganate (KMnO 4 ) against Ferrous ammonium sulphate (FAS) solution, dilute sulphuric acid but not nitric acid is used to maintain acidic medium, because | Nitric acid itself is an oxidising agent. |
| Question 26: The group reagent NH 4 Cl(s) and aqueous NH 3 will precipitate which of the following ions? | Al 2+ |
| Question 27: In the preparation of sodium fusion extract, the purpose of fusing organic compound with a piece of sodium metal is to | Convert the elements of the compound from covalent form to ionic form |
| Question 28: The sodium fusion extract is boiled with concentrated nitric acid while testing for halogens. By doing so, it | decompasses Na 2 S and NaCN, if formed |
| Question 29: Which of the following is not an aromatic compound? | Option 3 |
| Question 30: The IUPAC name of the given organic compound is HC ≡ C - CH = CH - CH = CH 2 |
Hexa - 1, 3 - dien - 5 - yne |
| Question 31: Among the following, identify the compound that is not an isomer of hexane. | Option 2 |
| Question 32: The organic compound can be classified as... | Benzyl halide |
| Question 33: Chlorobenzene reacts with bromine gas in the presence of Anhyd AlBr 3 , to yield p-Bromochlorobenzene. This reaction is classified as _______. | Electrophilic substitution reaction |
| Question 34: The organometallic compound (CH 3 ) 3 CMgBr on reaction with D 2 O produces ______. | (CH 3 ) 3 CD |
| Question 35: The major product formed when 1-Bromo-3-Chlorocyclobutane reacts with metallic sodium in dry ether is | Option 1 |
| Question 36: Ethyl alcohol is heated with concentrated sulphuric acid at 413 K. The major product formed is | C 2 H 2 - O - C 2 H 5 |
| Question 37: Phenol can be distiguished from propanol by using the reagent. | Bromine water |
| Question 38: Match the following with their pKa values | I-c, II-d, III-a, IV-b |
| Question 39: CH3-C-OCH3 | Option 4 |
| Question 40: Oxidation of Toluene with chromyl chloride followed by hydrolysis gives Benzaldehyde. This reaction is known as ______. | Etard Reaction |
The KCET Chemistry Answer Key 16 April 2025 available above is taken from the Collegedekho website.
KCET Chemistry Answer Key 16 April 2025: PDF Link
The PDF link to download the KCET unofficial Chemistry Answer Key 2025 is given in the table below.
| KCET Chemistry Answer Key 16 April 2025 PDF Link (to be added) |
The KCET Chemistry Answer Key 16 April 2025 available here is only for reference and is completely unofficial. KEA will release the KCET 2025 Provisional Answer Key soon after the exam concludes. Visit the official website of the Karnataka Examination Authority (KEA) for more updates.
KCET Expected Marks vs Rank 2025
|
165 Marks |
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