ICSE Class X Board Examination
ICSE Chemistry (Science Paper 2) — Specimen Question Paper 2024
Specimen2024Subject code 522
- Board
- ICSE Class X Board Examination
- Class
- Class 10
- Subject
- Chemistry
- Year
- 2024
- Total marks
- Not verified
- Duration
- Not verified
Verification and rights
Checked against a named, citable source that is recorded with the record.
Imported specimen paper from CollegeDekho (mirror of CISCE PDF) on 2026-08-29.
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.)
An aqueous solution of copper sulphate turns colourless on electrolysis.
Which of the following could be the electrodes?
P. anode: copper; cathode: copper
Q. anode: platinum; cathode: copper
R. anode: copper; cathode: platinum - 1((ii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
A compound P is heated in a test tube with sodium hydroxide solution. A red litmus
paper held at the mouth of the test tube turns blue.
Which of the following could compound P be? - 1((iii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
The atomic masses of sulphur (S), oxygen (O), and helium (He) are approximately
32, 16, and 4 respectively.
Which of the following statements regarding the number of atoms in 32 g of sulphur,
16 g of oxygen, and 4 g of helium is correct?
P. 16 g of oxygen contains four times the number of atoms as 4 g of helium.
Q. 16 g of oxygen contains half the number of atoms as 32 g of sulphur. - 1((iv))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
Ammonia gas is passed through quicklime and then collected in a jar. Red and blue
litmus papers are placed in the jar. W, X, Y and Z are the four observations.
Which of the above observations correctly shows the reaction of the litmus papers
to ammonia?
Red litmus paper Blue litmus paper
W turns blue remains blue
X remains red remains blue
Y remains red turns red
Z turns blue turns red - 1((viii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
A A+3; B B-1
Number of electrons present in the outermost shell of atoms A and B respectively are: - 1((ix))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
A __________ solution is observed after placing Magnesium metal in a solution of
Copper sulphate for half an hour. - 1((xi))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 is NOT true with respect to nitric acid? - 1((xiii))Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.)
The process of electrolysis is an example of: - 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 catalyst used in Ostwald’s process is ___________. - 2((i))The setup shown below is that of the fountain experiment with hydrogen chloride
gas in the flask.
The fountain starts when a few drops of water from the dropper are introduced into
the flask. Instead of the drops of water, Pooja started the fountain by introducing a
few drops of Sodium hydroxide into the flask.
(a) Explain why the litmus solution gets sucked up when Sodium hydroxide is
used.
(b) What will be the colour of the fountain when Sodium hydroxide is used?
Justify your answer.
(c) If instead of HCl gas, ammonia gas is filled in the flask and water is introduced
from the dropper, will there be a different observation? Justify your answer.5 marks - 2((ii))Match the following Column A with Column B.
Column A Column B5 marks - 2((v))(a) Draw the structural diagram for the following compounds:
1. 1- propanal
2. 1, 2 dichloro ethane
3. But-2-ene
(b) Give the IUPAC name of the following organic compounds:
1. 2.
(Attempt any four questions.)5 marks
Section B
- 3((i))Identify the reactant and write the balanced equation for the following:
Nitric acid reacts with compound Q to give a salt Ca(NO3)2, water and carbon
dioxide.2 marks - 3((ii))What property of Sulphuric acid is exhibited in each of the following cases:
(a) In the preparation of HCl gas when it reacts with Sodium chloride.
(b) When conc. Sulphuric acid reacts with Copper to produce Sulphur dioxide gas.2 marks - 3((iii))The electron affinity of an element X is greater than that of element Y.
(a) How is the oxidising power of X likely to compare with that of Y?
(b) How is the electronegativity of X likely to compare with that of Y?
(c) State whether X is likely to be placed to the left or to the right of Y in the
periodic table?3 marks - 3((iv))(a) State wether the following statements are TRUE or FALSE. Justify your
answer.
1. In an electrovalent compound, the cation attains the electronic
configuration of the noble gas that comes after it in the periodic table.
2. In the formation of a compound PQ2, atom P gives one electron to each
atom of Q. The compound PQ2 is a good conductor of electricity.
(b) Calculate the number of moles in 22 grams of carbon dioxide .3 marks - 4((i))The following questions relate to the extraction of Aluminium by electrolysis.
(a) Name the other aluminum containing compound added to alumina.
(b) Give a balanced equation for the reaction that takes place at the cathode.2 marks - 4((ii))A gas cylinder of capacity 40 dm3 is filled with gas X the mass of which is 20 g.
When the same cylinder is filled with hydrogen gas at the same temperature and
pressure the mass of hydrogen is 2 g. Find the relative molecular mass of the gas.2 marks - 4((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) Dehydration of ethanol by conc. Sulphuric acid at a temperature of 170oC.3 marks - 4((iv))With respect to Haber’s process answer the following:
(a) Temperature of the reaction
(b) Catalyst used
(c) Balanced equation for the reaction occurring3 marks - 5((i))(a) Ranjana wants to prove that ammonia is a reducing agent. To demonstrate this,
she passes ammonia gas over heated copper oxide. What will she observe?
(b) Write a balanced chemical equation for the above reaction.2 marks - 5((ii))Name the alloy which is made up of:
(a) Copper, Zinc and Tin
(b) Lead and Tin2 marks - 5((iii))Seema takes a blue crystalline salt P in a test tube. On heating it produces a white
anhydrous powder. P is dissolved in water. Zinc is added to one part of the solution
and to another part of the solution Barium chloride is added.
(a) Name the compound P.
(b) Mention one observation when zinc is added to the solution of P.
(c) State the colour of the precipitate formed when barium chloride is added to the
solution of P.3 marks - 5((iv))Give reasons:
(a) Ethene undergoes addition reaction.
(b) Hydrocarbons can be used as fuels.
(c) Hydrogen chloride gas cannot be collected over water.3 marks - 6((i))Name the following:
(a) The ore of Zinc containing its sulphide .
(b) The most commonly used oxide ore of Aluminium.2 marks - 6((ii))State one observation in the following cases:
(a) Sodium chloride solution is added to a solution of lead nitrate.
(b) Barium chloride solution is added to a solution of Zinc sulphate.2 marks - 6((iii))Copper sulphate solution is electrolysed using copper electrodes.
(a) Which electrode [cathode or anode] is the oxidizing electrode? Why?
(b) Write the equation for the reaction occurring at the above electrode.3 marks - 6((iv))X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information complete the
following:
(a) __________ is the metallic element.
(b) Metal atoms tend to have a maximum of __________ electrons in the
outermost shell.
(c) ___________ is the reducing agent.3 marks - 7((i))The empirical formula of an organic compound is C3H4N. Its molecular weight is 108.
Find the amount of carbon in one mole of the compound. Show all the steps involved.
(Atomic weights: C- 12; H- 1; N- 14)3 marks - 7((ii))(a) Mahesh prepared a basic solution X that has a pH 7.
How will the pH of the solution X change on addition of the following:
1. Hydrochloric acid
2. a solution of a base
(b) The atomic number of an element is 15. To which group will this element
belong to?3 marks - 7((iii))8.2 grams of calcium nitrate is decomposed by heating according to the equation
2Ca (NO3)2 _____ 2CaO +4NO2 + O2
Calculate the following:
(a) Volume of nitrogen dioxide obtained at STP
(b) Mass of CaO formed
[Atomic weights: Ca –40 , N—14, O—16]4 marks - 8((i))State giving reasons if:
(a) zinc and aluminium can be distinguished by heating the metal powder 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 Hydronium ion.2 marks
- 8((iii))Give balanced equations for the following:
(a) Laboratory preparation of ethyne from calcium carbide.
(b) Conversion of acetic acid to ethyl acetate.
(c) Laboratory preparation of nitric acid.3 marks - 8((iv))Identify the following substances:
(a) An alkaline gas which produces dense white fumes when reacted with HCl
gas.
(b) The anion present in the salt, which produces a gas with the smell of rotten
eggs when reacted with dil. HCl.
(c) The particles present in strong electrolytes.3 marks