ISC Chemistry 2027 Specimen Paper with Answers
All 38 questions of the ISC Chemistry 2027 Specimen Paper, in printed order. Open a question to read it in full and see its answer.
- Q1(A)(i) Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [methyl alcohol, ethyl alcohol, paired… 1 mark · Fill in
- Q1(A)(ii) Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [methyl alcohol, ethyl alcohol, paired… 1 mark · Fill in
- Q1(A)(iii) Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [methyl alcohol, ethyl alcohol, paired… 1 mark · Fill in
- Q1(A)(iv) Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [methyl alcohol, ethyl alcohol, paired… 1 mark · Fill in
- Q1(B)(i) The correct order of freezing point of $0\cdot5\text{ M}$ solution of urea, $\text{AlCl}_3$, $\text{KCl}$ and $\text{MgCl}_2$ is: 1 mark · MCQ
- Q1(B)(ii) Glucose molecules react with (x) number of molecules of phenyl hydrazine to yield glucosazone. The melting point of glucosazone… 1 mark · MCQ
- Q1(B)(iii) Which among the following coordination compound does not give white precipitate of $\text{AgCl}$ when treated with… 1 mark · MCQ
- Q1(B)(iv) The following data was obtained for a hypothetical reaction $2A + B \rightarrow 2AB$ S. No. $[A]$ (mol $L^{-1}$) $[B]$ (mol… 1 mark · MCQ
- Q1(B)(v) Which of the following organic compound on reduction with $\text{LiAlH}_4$ gives secondary amine? 1 mark · MCQ
- Q1(B)(vi) When an ether containing a primary alkyl group and tertiary alkyl group is treated with hydrogen iodide, tertiary alkyl iodide is… 1 mark · Assertion-reason
- Q1(B)(vii) In a Daniell cell, during the passage of current, copper gets deposited at cathode. 1 mark · Assertion-reason
- Q1(C) The hydroxy derivatives of aliphatic hydrocarbons are called alcohols. Ethanol is perhaps the most important aliphatic alcohol… 3 marks · Case based
- Q2 The standard reduction electrode potential ($E^\circ$) of some metals is given below: Metal $E^\circ$ $\text{Ag}^+/\text{Ag}$… 2 marks · Short answer
- Q3 An alkene [A] with molecular formula, $\text{C}_5\text{H}_{10}$ on ozonolysis and subsequent hydrolysis gives a mixture of two… 2 marks · Short answer
- Q4(i) Answer the following questions with respect to the coordination complex ion $[\text{Cr}(\text{NH}_3)_6]^{3+}$ What is the… 2 marks · Short answer
- Q4(ii) Observe the diagram below of splitting of d-orbital in octahedral field and answer the following questions. Identify the… 2 marks · Short answer
- Q5 Rohan, a patient of thyroid disorder, was given certain amount of radioactive Iodine-131 as a part of his treatment. The… 2 marks · Numerical
- Q6 How can the following conversions be carried out? (Write the chemical equations): Aniline to chlorobenzene Chloroethane to… 2 marks · Short answer
- Q7 Substantiate the following statements with reasons. Cobalt is attracted in a magnetic field whereas Zinc is not. (Atomic number… 2 marks · Short answer
- Q8 Write the Nernst equation and calculate the emf of the following cell at 298K… 2 marks · Numerical
- Q9(i) Illustrate the following reactions with an example in each case: Coupling reaction Balz-Schiemann reaction 2 marks · Short answer
- Q9(ii) An organic compound [A] with molecular formula $\text{C}_3\text{H}_7\text{NO}$ forms compound [B] on heating with $\text{Br}_2$… 2 marks · Short answer
- Q10 In general, it is observed that the rate of a reaction becomes double with every $10^\circ\text{C}$ rise in temperature. If this… 2 marks · Numerical
- Q11 The students of Class XII were on a study trip. They visited a nearby lake and took some water samples which were rich in sodium… 2 marks · Numerical
- Q12 Two students Rehan and Ananya were given the same compound, alkyl halide ($\text{C}_2\text{H}_5\text{Cl}$) by their chemistry… 3 marks · Short answer
- Q13 Answer the following questions: For a given first order reaction, it takes 5 minutes for the initial concentration of… 3 marks · Numerical
- Q14(i) Answer the following: Compounds [X] and [Y] are functional isomers of each other with molecular formula… 3 marks · Short answer
- Q14(ii) How will the following be converted? (Give chemical equations) Diethyl ether from sodium ethoxide Propan-2-ol from Grignard’s… 3 marks · Short answer
- Q15 Answer the following questions: Complete and balance the following chemical equation… 3 marks · Short answer
- Q16 Answer the following questions: Identify the non-reducing sugar which on hydrolysis gives two reducing monosaccharides. Which… 3 marks · Short answer
- Q17(i) Three electrolytic cells (X), (Y) and (Z) containing solutions of $\text{AgNO}_3$, $\text{CuSO}_4$ and $\text{ZnSO}_4$… 3 marks · Numerical
- Q17(ii) The molar conductivities at infinite dilution for $\text{NaI}$, $\text{CH}_3\text{COONa}$ and… 3 marks · Numerical
- Q18 Write the chemical equations for the following conversions: Nitrobenzene to benzene Aniline to bromobenzene Methyl cyanide to… 3 marks · Short answer
- Q19(i) An organic compound [A] with molecular formula $\text{C}_2\text{Cl}_3\text{O}_2\text{H}$ is obtained when compound [B] reacts… 5 marks · Short answer
- Q19(ii) Answer the following: Identify the compounds [A], [B] and [C] in the following reaction sequence… 5 marks · Short answer
- Q20 Answer the following questions: The compound $[\text{PtCl}_2(\text{NH}_3)_2]$ also known as cis-platin, is used in chemotherapy… 5 marks · Short answer
- Q21(i) Answer the following: $300\text{ ml}$ of aqueous solution of protein contains $1\cdot85\text{ g}$ of protein, the osmotic… 5 marks · Numerical
- Q21(ii) Answer the following: Arrange the following aqueous solutions in increasing order of osmotic pressure. Give reasons in support of… 5 marks · Numerical