ICSE Class X Board Examination
ICSE Chemistry (Science Paper 2) — Specimen Question Paper 2026
Official CISCE specimen question paper published ahead of the ICSE Class X Board Examination 2026.
Specimen2026Subject code 522
- Board
- ICSE Class X Board Examination
- Class
- Class 10
- Subject
- Chemistry
- Year
- 2026
- Total marks
- 80 marks
- Duration
- 2 hours
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Questions in this paper
Section A
- 1((i))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Which of the following will dissociate in aqueous solution, to give a
positive ion other than hydronium ion, and a negative ion other than
hydroxyl ion?
(a) KOH
(b) dil. HCl
(c) NaCl - 1((iii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Assertion (A): Aqueous solution of potassium chloride can conduct
electricity.
Reason (B): Conduction of electric current is due to the presence of
free ions. - 1((v))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Four reactions are shown below in the diagram:
1. 2.
3. 4.
Which reactions produce water?
(a) 1 and 2
(b) 1 and 3
(c) 3 and 4 - 1((vi))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
When compound X reacts with dilute sulphuric acid, it releases a gas that
turns acidified potassium dichromate solution from orange to green.
Which of the following could be compound X?
(a) Lead nitrate
(b) Copper carbonate
(c) Sodium chloride - 1((viii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Identify from the following metal oxide which can react with an acid as
well as an alkali. - 1((x))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Which element amongst the following has the largest atomic radius?
(a) Al
(b) S
(c) Mg - 1((xi))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
For which pH change is there the maximum increase in acidity?
Initial pH Final pH
(a) 1 3
(b) 2 6
(c) 3 1 - 1((xii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
The equation below shows the reaction between element ‘X’ and dilute
sulphuric acid.
X(s) + H2SO4 (aq.) XSO4 (aq.) + H2 (g)
Which particles are responsible for conducting electricity in dilute
sulphuric acid and compound XSO4? - 1((xiii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Methanol and ethanol belong to the same homologous series.
What does this statement mean? - 1((xiv))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
The ratio between the volumes occupied by 22 grams of carbon dioxide
and 10 grams of hydrogen gas is: - 1((xv))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
In the process of Electrorefining of Copper shown in the diagram below,
which of the following statements is correct? - 2((i))Electroplating steel objects with silver involves a three-step process.
step 1 A coating of copper is applied to the object.
step 2 A coating of nickel is applied to the object.
step 3 The coating of silver is applied to the object.
(a) A diagram of the apparatus used for step 1 is shown.
1. The chemical process taking place on the surface of the object
is Cu2 + (aq) + 2e- Cu(s)
What is the observation seen on the surface of the object?
2. Explain why the concentration of copper ions in the
electrolyte remains constant throughout step1.
(b) Give two changes which would be needed in order to coat nickel
onto the object in step 2.
during step 3.5 marks - 2((iv))Match Column A with Column B.
Column A Column B
(a) Aluminium 1. Covalent compound
(b) Sulphuric acid 2. Carbonate ore
(c) Calcination 3. Hall Heroult’s process
(e) Carbon tetrachloride 5. Electrovalent compound5 marks - 2((v))(a) Give the IUPAC name of the following organic compounds:
1.
2.
(b) Draw the structural diagram for the following compounds:
1. but-2-yne
2. 1, 1, 1, trichloro methane
3. pentan -2-ol
(Attempt any four questions.)5 marks
Section B
- 3((i))Give one significant observation when:
(a) Excess of chlorine gas reacts with ammonia.2 marks - 3((ii))Give reasons:
(a) When ammonia gas is passed over black copper oxide in a
combustion tube a reddish-brown substance is left behind.
(b) Quick lime is not used to dry hydrogen chloride gas.2 marks - 3((iv))Write balanced chemical equations for the following reactions:
(a) Ammonium chloride reacts with calcium hydroxide.
(b) Nitric acid reacts with zinc carbonate.
(c) Concentrated sulphuric acid is added to hydrated copper sulphate.3 marks - 4((i))Name the main metal present in the following alloys:
(a) Duralumin
(b) Brass2 marks - 4((ii))Write balanced chemical equations for the following:
(a) Laboratory preparation of hydrochloric acid from a less volatile
acid.
tetrachloride.2 marks - 4((iii))Abhishek was given a salt ‘X’ for analysis which was white in colour. On
strong heating it produced a yellow residue, a colourless gas, and also a
reddish-brown gas. The solution of the salt ‘X’ when tested with excess
of ammonium hydroxide produced a chalky white insoluble precipitate.
(a) Name the coloured gas evolved when Abhishek heated the salt
strongly.
(b) Which cation was present in the sample given to Abhishek?
(c) Identify the salt given to Abhishek for analysis.3 marks - 4((iv))In a round bottom flask, a mixture of ethanol, acetic acid and concentrated
sulphuric acid was heated:
(a) Name the type of reaction occurring in the above set up.
(b) What is the role of sulphuric acid in this reaction?
(c) State one observation that takes place during the reaction.3 marks - 5((i))Identify the reactant and write the balanced equation for the following:
Nitric acid reacts with compound Q to give a salt Calcium nitrate, water
and carbon dioxide.2 marks - 5((ii))What will be the mass of carbon dioxide that will contain the same
number of molecules as present in 3.2g of oxygen gas?
[At. Wt: O=16, C=12] & Application]2 marks - 5((iii))State the property exhibited by sulphuric acid in each of the following
reactions:
(a) Sulphur with concentrated sulphuric acid.
(b) Conversion of ferrous sulphide to hydrogen sulphide gas using
sulphuric acid.3 marks - 6((i))A student was asked to perform two experiments in the laboratory based
on the instructions given:
Observe the picture given below and state one observation for each of the
Experiments 1 and 2 that you would notice on mixing the given solutions.
(a) Experiment 1
(b) Experiment 22 marks - 6((ii))You are provided with the list of chemicals mentioned below in the box:
Sodium hydroxide solution, copper carbonate, zinc,
hydrochloric acid, copper, dilute sulphuric acid
Using suitable chemicals from the list given, write balanced chemical
equation for the preparation of the salts mentioned below:
(a) copper sulphate2 marks - 6((iii))Solid ammonium dichromate decomposes as under:
(NH4)2Cr2O7 N2 + Cr2O3 + 4H2O
If 126 g of ammonium dichromate decomposes, calculate:
(a) the number of moles of ammonium dichromate that undergoes
decomposition.
(b) the mass of chromic oxide formed at the same time.
(c) the volume of nitrogen gas evolved at STP.
[At. Wt: N=14, Cr =52, O=16, H=1] & Application]3 marks - 6((iv))Identify the reactants P, Q and R in the following reactions:
(a) Copper oxide + P Copper + water
(b) Iron pyrite + Q Iron oxide + Sulphur dioxide
(c) Sodium chloride + R Sodium nitrate + Silver chloride3 marks - 7((i))Give reasons for the following:
(a) Nitric acid does not normally liberate hydrogen gas when it reacts
with active metals.
(b) Silver-plated cutlery is not considered as pure silver.2 marks - 7((ii))The following questions relate to the extraction of Aluminium by
electrolysis.
(a) Name the other compound which contains aluminium added to
alumina.
(b) Give a balanced equation for the reaction that takes place at the
cathode.2 marks - 7((iii))Give balanced equations for each of the following:
(a) Action of warm water on aluminium nitride.
(b) Oxidation of carbon with conc. nitric acid.
(c) Laboratory preparation of ethanol by using chloroethane and3 marks - 7((iv))Rohit has solution X, Y and Z that has pH 2, 7 and 13 respectively.
Which solution:
(a) will liberate sulphur dioxide gas when heated with sodium sulphite?
(b) will liberate ammonia gas when reacted with ammonium chloride?
(c) will not have any effect on litmus paper?3 marks - 8((i))State giving reasons if:
(a) zinc metal and aluminium metal can be distinguished by heating the
metal powders separately in two different test tubes with
concentrated sodium hydroxide solution.
(b) calcium nitrate and lead nitrate can be distinguished by adding
ammonium hydroxide solution to the salt solution.2 marks - 8((ii))Draw the electron dot diagram of ammonium ion.
[Atomic No.: N = 7, H = 1]
Understanding]2 marks - 8((iii))Write balanced chemical equation for the following conversions (A to C):
ZnSO4 Zn ZnS
Zn(OH)23 marks - 8((iv))L, M and N are three elements with atomic numbers 13, 7 and 10
respectively. Answer the following questions using only the alphabets
given. Do not identify the elements.
Which element:
(a) can combine with hydrogen to form a gas which produces dense
white fumes with concentrated HCl?
(b) has zero electron affinity?
(c) can form an ionic compound with oxygen?
ICSE 2026 SPECIMEN3 marks