ISC Chemistry 2024 Question Paper with Answers
All 35 questions of the ISC Chemistry 2024 Question Paper, in printed order. Open a question to read it in full and see its answer.
- Q1(A)(i) Choose the appropriate word(s) from the bracket [lead poisoning, zero, phosgene, dependent, cancer, independent, diethyl ether… 1 mark · Fill in
- Q1(A)(ii) Choose the appropriate word(s) from the bracket [lead poisoning, zero, phosgene, dependent, cancer, independent, diethyl ether… 1 mark · Fill in
- Q1(A)(iii) Choose the appropriate word(s) from the bracket [lead poisoning, zero, phosgene, dependent, cancer, independent, diethyl ether… 1 mark · Fill in
- Q1(A)(iv) Choose the appropriate word(s) from the bracket [lead poisoning, zero, phosgene, dependent, cancer, independent, diethyl ether… 1 mark · Fill in
- Q1(B)(i) Which one of the following statements is correct regarding the dry cell? (P) Zinc container acts as an anode in dry cell. (Q)… 1 mark · MCQ
- Q1(B)(ii) The metal complex ion that is paramagnetic is: (Atomic number of $\text{Fe} = 26$, $\text{Cu} = 29$, $\text{Co} = 27$ and… 1 mark · MCQ
- Q1(B)(iii) When $\text{KMnO}_4$ is heated with acidified oxalic acid, gas bubbles are evolved. These gas bubbles are evolved due to the… 1 mark · MCQ
- Q1(B)(iv) The reaction of ethanamide with alcoholic sodium hydroxide and bromine gives: 1 mark · MCQ
- Q1(B)(v) An equimolar solution of non-volatile solutes A and B, shows a depression in freezing point in the ratio of $2:1$. If A remains… 1 mark · MCQ
- Q1(B)(vi) Specific conductivity of all electrolytes decreases on dilution. 1 mark · Assertion-reason
- Q1(B)(vii) Ammonolysis of alkyl halides involves the reaction between alkyl halides and alcoholic ammonia. 1 mark · Assertion-reason
- Q1(C) When two solutions are separated by a semi-permeable membrane, the solvent molecules move from a solution of lower molar… 3 marks · Case based
- Q2 Write a chemical test to distinguish between ethanol and phenol. Give a chemical reaction to convert acetaldehyde into secondary… 2 marks · Short answer
- Q3 Give a reason for each of the following. Zinc, cadmium and mercury are considered as d-block elements but not regarded as… 2 marks · Short answer
- Q4 Convert the following by giving chemical equations for each. Ethyl bromide to diethyl ether Phenol to salicylaldehyde 2 marks · Short answer
- Q5 Account for each of the following. Zirconium (Zr) and Hafnium (Hf) are difficult to separate. Salts of Cupric ($\text{Cu}^{2+}$)… 2 marks · Short answer
- Q6 How will you bring the following conversions? Benzene to biphenyl Iodoform to acetylene 2 marks · Short answer
- Q7 Calculate the maximum possible electrical work that can be obtained from a galvanic cell under standard conditions at… 2 marks · Numerical
- Q8(i) Give a reason for each of the following. Ethoxy ethane does not react with sodium, but ethanol does. Methoxy ethane with conc… 2 marks · Short answer
- Q8(ii) An organic compound [A] having molecular formula $\text{C}_4\text{H}_{10}\text{O}$ forms a compound [B] with molecular formula… 2 marks · Short answer
- Q9 If $200\text{ cm}^3$ of an aqueous solution of a protein contains $1\cdot26\text{ g}$ of protein, the osmotic pressure of the… 2 marks · Numerical
- Q10 Benzaldehyde is less reactive than propionaldehyde. Why? In the preparation of ethanal by the oxidation of ethanol, ethanal… 2 marks · Short answer
- Q11 Why is $\text{Mn}^{2+}$ ion more stable than $\text{Fe}^{2+}$ ion? (Atomic number of $\text{Mn} = 25$ and $\text{Fe} = 26$)… 2 marks · Short answer
- Q12 For the reaction $\text{A} + \text{B} \rightleftharpoons \text{Product}$, following data was obtained: Experiment number Initial… 3 marks · Short answer
- Q13 Illustrate the following reactions by giving one suitable example in each case. (a) Coupling reaction (b) Acetylation of… 3 marks · Short answer
- Q14 Aradhana visits a physician as she is suffering from rickets and joint pain. Which fat-soluble vitamin should the physician… 3 marks · Short answer
- Q15 An aqueous solution containing $12\cdot50\text{ g}$ of barium chloride in $1000\text{ g}$ of water boils at… 3 marks · Numerical
- Q16 An organic compound $\text{C}_2\text{H}_4\text{O}$ gives red precipitate when heated with Fehling solution. It also undergoes… 3 marks · Short answer
- Q17(i) Identify the compounds [A], [B] and [C] in each of the following reactions… 3 marks · Short answer
- Q17(ii) Give a chemical test to distinguish between the following pairs of compounds. Ethanol and methanol Ethanol and Ethanal… 3 marks · Short answer
- Q18 The rate constant of a reaction at $500\text{ K}$ and $700\text{ K}$ are $0\cdot02\text{ sec}^{-1}$ and… 3 marks · Numerical
- Q19 An organic compound [A], having a specific smell forms two compounds [B] and [C] by reacting with conc. sodium hydroxide. The… 5 marks · Short answer
- Q20 A coordination compound has a formula $\text{CoCl}_3\cdot 4\text{NH}_3$. It precipitates silver ions as $\text{AgCl}$ and its… 5 marks · Short answer
- Q21(i) Study the diagram given below that represents Cu-Ag electrochemical cell and answer the questions that follow. Given… 5 marks · Numerical
- Q21(ii) A $0\cdot05\text{ M } \text{NH}_4\text{OH}$ solution offers the resistance of $30\cdot8\text{ ohms}$ to a conductivity cell at… 5 marks · Numerical