ICSE question bank

Every question in the vault, filterable by class, subject, chapter, topic, year, marks, difficulty, type and source. The filters live in the URL, so any view you build can be shared.

275 questions

Class 10 · Chemistry
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?
MCQ
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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.
MCQ
Class 10 · Chemistry
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?
MCQ
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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
Short answer
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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
Short answer
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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 and
3 marksShort answer
Class 10 · Chemistry
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
Diagram based
Class 10 · Chemistry
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.
MCQ
Class 10 · Chemistry
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 marksNumerical
Class 10 · Chemistry
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
Short answer
Class 10 · Chemistry
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 compound
5 marksLong answer
Class 10 · Chemistry
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 marksShort answer
Class 10 · Chemistry
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 chloride
3 marksShort answer