ICSE CHEMISTRY CLASS 10 Multiple Choice questions

ICSE CHEMISTRY - MCQs from The Periodic Table Chemical Bonding and gases

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a) Choose the correct answer from A, B, C and D for each of the following statements.  

 

i) The number of valence electrons present in Sodium atom:

A) 1                             B) 2                             C) 3                                         D) 4

 

ii) Which of the following periodic property decreases across a period in the periodic table?

A) Electron affinity                B) Electronegativity                           

C) Metallic character               D) Ionization Potential

 

iii) The statement which is not true about Electrovalent Bond?

A) Ions are formed                             B) Molecules are formed                               

C) Electron transfer takes place          D) It is formed between a metal and a non-metal

 

iv) The electronic configuration of Oxide ion is:

A) 2,6                          B) 2,8                          C) 2,8,6                       D) 2

 

v) In the formation of Sodium chloride:

A) Sodium loses 1 electron and oxidized                   B) Sodium loses 1 electron and reduced

C) Sodium gains 1 electron and reduced                    D) Sodium gains 1 electron and oxidized

 

vi) Magnesium atom loses _____ electrons and attains the electronic configuration of _______.

A) 2, Argon                 B) 1, Neon                  C) 2, Neon                  D) 1, Argon

 

vii) The Noble gas which does not possess Octet Configuration:

A) Neon                      B) Helium                   C) Argon                     D) Krypton

 

viii) A gas turns lime water milky but has no effect on acidified KMnO₄ solution:

A) Oxygen gas            B) Hydrogen gas         C) Carbon dioxide      D) Sulphur dioxide

 

ix) An acidic gas with reddish brown colour:

A) Nitrogen dioxide               B) Hydrogen sulphide                       

C) Hydrogen chloride             D) All of the above

 

x) A compound which contains molecules in it?

A) Sodium chloride                B) Methane

C) Calcium oxide                    D) Magnesium chloride

ICSE CLASS 10 EMPIRICAL FORMULA AND PERCENTAGE COMPOSITION MCQs for Practice

ICSE CHEMISTRY MCQs on EMPIRICAL FORMULA  AND PERCENTAGE COMPOSITION

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Choose the correct answer from A,B,C and D for each of the following statements.

Question 1

A Hydrocarbon is found to contain 75% of Carbon. Then the percentage of Hydrogen that compound has:

A) 75%

B) 25%

C) 30%

D) 50%

 

Question 2

The Relative Molecular Mass (RMM) of a compound is 180. What will be its Vapour Density?

A) 90

B) 180

C) 45

D) 10

 

Question 3

A gaseous compound has the formula X₂Y. The atomic weights are X-5 and Y-10. Find its Vapour Density (VD):

A) 5

B) 15

C) 20  

D) 10

 

Question 4

The Vapour Density of a substance is :

i) Half of RMM

ii) equal to RMM

iii) Twice the RMM

iv) 3 times the RMM

 

 

Question 5

The simplest whole number ratio of the number of atoms of each element present in a given compound.

A) Molecular formula

B) Unit formula

C) Empirical formula

D) Formula weight

 

Question 6

The molecular weight is equal to:

A) (Empirical Formula weight) / n

B) (Empirical formula weight) x n

C) Twice the Empirical formula weight

D) Half of empirical formula weight

 

Question 7

The Empirical formula of a compound is C₂H₅. Given n= 2, What is the Molecular formula of that compound?

A) C₂H₅

B) C₄H₈

C) C₂H₁₀
D) C₄H₁₀

 

Question 8

Which of the following compounds has the empirical formula CH₃?

A) CH₄

B) C₃H₆

C) C₂H₆

D) C₈H₁₂

 

Question 9

The Empirical formula of CH₃COOH:

A)    CHO

B)    COOH

C)    CO₂H

D)    CH₂O

 

Question 10

6.4g of Sulphur combines with Oxygen to form 12.8 g of its oxide. Find the percentage of Oxygen in it.

A) 15%

B) 25%
C) 50%

D) 75%

 

Question 11

19.2g of Carbon combines with 4.8g of Hydrogen completely to form a Hydrocarbon. Calculate percentage composition of that compound.

 

A) C-25% and H-75%

B) C-75% and H-25%

C) C-20% and H-80%

D) C-80% and H-20%

 

Question 12

The empirical formula formula of a compound is CH₂O and n=2. Find the molecular formula :

A) C₂H₄O₂

B) CHO

C) C₂H₂O₂

D) CH₂O₄

 

Question 13

The Molecular formula and Empirical formula of a compound are C₂H₄ and CH₂ respectively. What is the ratio between its Molecular weight and the Empirical Formula weight?

A) 1

B) 2

C) 3

D) 4

 

Question 14

Find the Relative Molecular Mass of Copper Sulphate crystals.

At. wt. H-1, O-16, S-32, Cu-64

A) 160

B) 200

C) 260

D) 250

 

Question 15

Find the percentage of Oxygen in Magnesium nitrate crystals [Mg(NO₃)₂.6H­₂O]

At.wt. H-1, N-14, O-16, Mg-24

A) 43.75%

B) 37.5%

C) 57%

D) 75%

 

Question 16

Calculate the RMM of Sulphuric acid and Sodium carbonate.

At. wt. H-1, C-12, O-16, Na-23, S-32

A) 98 and 100

B) 100 and 106

C) 98 and 106

D) 98 and 83

Question 17

A compound has the following percentage composition. Find its Empirical Formula and Molecular formula. Given n=2. N-87.5% and H – 12.5% (at. wt. H-1, N-14)

A) NH₂ and NH₄

B) NH and N₂H₄

C) N₂H and NH₄

D) NH₂ and N₂H₄

ICSE CHEMISTRY MCQs on Practical Chemistry

ICSE Multiple choice Questions on Practical Chemistry

 

Choose the correct answer from A, B, C and D for each of the following statements.

Question 1

The gas with greenish yellow colour

A) Hydrogen gas

B) Oxygen gas

C) Chlorine gas

D) Ammonia gas

 

Question 2

The observation when Sodium chloride is heated with Conc. Sulphuric acid:

A) A colourless pungent odour gas which turns Nessler’s reagent to brown

B) A colourless gas which gives dense white fumes with Ammonia gas

C) A gas with rotten egg smell which turns Lead acetate paper to silvery black

D) Reddish brown vapours evolved

 

Question 3

When dilute Hydrochloric acid is added to Silver nitrate solution

A) A white precipitate is formed which dissolves in excess Ammonium hydroxide

B) A white precipitate is formed which is insoluble in excess Ammonium hydroxide

C) A white precipitate which dissolves on heating

D) No precipitate is formed

 

Question 4

A salt ‘X’ gives brisk effervescence of a colourless gas which turns lime water milky but has no effect on acidified KMnO₄ solution. The anion present in the salt ‘X’ is

A) Sulphide ion

B) Nitrate ion

C) Carbonate ion

D) Sulphite ion

 

 

Question 5

The cation present in the salt which gives lilac flame in flame test:

A) Potassium ion

B) Calcium ion

C) Copper ion

D) Sodium ion

 

Question 6

The gas which turns lime water milky and acidified Potassium dichromate to clear green solution:

A) Sulphur dioxide gas

B) Carbon dioxide gas

C) Hydrogen chloride gas

D) Carbon dioxide gas

 

Question 7

Which of the following salts would give a bluish white precipitate with barium chloride solution and the precipitate is insoluble in dilute Nitric acid?

A) Zinc sulphate

B) Copper (II) sulphate

C) Silver nitrate
D) Copper chloride

 

Question 8

Which of the following gases turns moist red litmus to blue?

A) Hydrogen chloride gas

B) Chlorine gas

C) Ammonia gas

D) Oxygen gas

 

Question 9

Which of the following reagents gives a white precipitate with dilute Hydrochloric acid but not with dilute Nitric acid?

A)    Lead chloride

B)    Lead nitrate solution

C)    Sodium chloride solution

D)    Nessler’s reagent

 

Question 10

Which of the following cations would give a white precipitate with Sodium hydroxide but not with Ammonium hydroxide?

A) Calcium ion

B) Zinc ion
C) Ferrous ion

D) Lead ion

 

Question 11

Which of the following precipitates dissolves in excess Ammonium hydroxide and gives a deep blue solution?

A) Zinc hydroxide

B) Lead hydroxide

C) Ferrous hydroxide

D) Copper hydroxide

 

Question 12

The ion present in the salt solution which gives a Gelatinous white precipitate with small amount of Ammonium hydroxide

 

A) Cu²⁺

B) Zn²⁺

C) Fe²⁺

D) Pb²⁺

 

Question 13

Sodium hydroxide solution is added to Lead nitrate solution in small amounts first  and then in excess amount:

A) White precipitate is formed then dissolved

B) White precipitate is formed and remains precipitate

C) Blue precipitate is formed which dissolves in excess NaOH

D) Blue precipitate insoluble in excess NaOH

 

Question 14

Ferrous hydroxide:

A) dissolves in excess NaOH but not in Excess Ammonium hydroxide

B) dissolves in excess Ammonium hydroxide but not in Excess Sodium hydroxide

C) Soluble in both NaOH and NH₄OH in excess

D) insoluble in both of NaOH and NH₄OH

 

Question 15

Which of the following compounds is soluble in excess Sodium hydroxide but not in Ammonium hydroxide?

A) Cu(OH)₂

B) Pb(OH)₂

C) Zn(OH)₂

D) Fe(OH)₂

ICSE CLASS 10 ELECTROLYSIS Multiple Choice Questions - MCQs for Practice

ICSE CHEMISTRY ELECTROLYSIS Multiple Choice Questions

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Electrolysis MCQs - ICSE CHEMISTRY

Choose the correct answer from A, B, C and D for each of the following statements.

Question 1

The presence of the following is mandatory for the conduction of electric current though an electrolyte:

A) electrons

B) ions

C) molecules

D) free ions

 

Question 2

Which of the following statements is true about a strong electrolyte?

A) undergoes partial dissociation

B) undergoes complete dissociation

C) does not undergo dissociation

D) does not conduct electricity in its aqueous solution

 

Question 3

Arrange these cations in the decreasing order of their tendency to get reduced Mg²⁺, Cu²⁺, Ag¹⁺, Zn²⁺

A) Mg²⁺ > Cu²⁺ > Ag¹⁺ > Zn²⁺

B) Mg²⁺ > Zn²⁺> Cu²⁺  > Ag¹⁺

C) Ag¹⁺ >  Cu²⁺ > Zn²⁺ > Mg²⁺  

D) Ag¹⁺ <  Cu²⁺ < Zn²⁺ < Mg²⁺  

 

Question 4

An example of inert electrode

i) Graphite

ii) Nickel

iii) Silver

iv) Copper

 

 

Question 5

The selective discharge of ions does not depend on

A) concentration of ions

B) position of the ion in the electro-chemical series

C) electrolyte

D) nature of the electrode

 

Question 6

Which of the following ions is called a spectator ion?

A) Chloride ion

B) hydroxide ion

C) sulphate ion

D) Bromide ion

 

Question 7

The anode used in the electrolysis of fused Lead bromide

A) Iron

B) Graphite

C) Copper
D) Silver

 

 

Question 8

The electrolyte added to water during the  electrolysis of water:

A) dil. Hydrochloric acid

B) dil. Sulphuric acid

C) dilute Nitric acid

D) Conc. HCl

 

Question 9

When acidified water is electrolysed using platinum electrodes ________ gas is released at cathode and __________ gas at  anode in the ratio _______ by volume.

A)    Oxygen, Hydrogen, 2:1

B)    Hydrogen, Oxygen, 1:2

C)    Hydrogen, Oxygen, 2:1

D)    Oxygen, Hydrogen, 1:2

 

Question10

 Which of the following statements is not true about the cathode in electrolysis process?

A) Reduction electrode

B) attracts cations
C) accepts electrons from cation

D) donates electrons to cation

 

Question 11

A weak electrolyte:

 

A) Fused Lead bromide

B) Aqueous solution of Sodium chloride

C) dilute Acetic acid

D) Sugar solution

 

Question 12

During electrolysis of Copper sulphate solution using Copper electrodes

i) blue colour of the solution fades

ii) pinkish brown coating on cathode

iii) anode diminishes in size

iv) cations discharged at cathode are replaced by anode

 

A) i) only correct

B) i) and ii) are correct

C) ii) and iii) are correct

D) i) is incorrect and rest all are correct

 

Question 13

The ions present in acidified water during electrolysis:

A) H⁺ , OH^1-

B) H¹⁺, OH^1- and SO₄^2-

C) H¹⁺ and SO₄^2-

D) H⁺ only

 

Question 14

The ion which gets discharged at cathode during the electrolysis of Conc. Sodium chloride:

A) Sodium ion

B) Hydrogen ion

C) Chloride ion

D) Hydroxyl ion

 

Question 15

During electro-refining a metal that the anode is made of:

A) pure block of the metal

B) impure block of the metal

C) impure sheet of the metal

D) pure sheet of the metal

 

Question 16

Anode reaction in electrolysis of Copper sulphate solution using  Copper electrodes:

A) Cu²⁺ + 2e^- à Cu

B) 2H⁺ + 2e^- à H₂

C) Cu – 2e^- à Cu²⁺

D) 4OH^- - 4e^- à O₂ + 2H₂O

 

Question 17

Which of the following compounds can conduct large amounts of electric current through their aqueous solutions?

A) Sodium chloride

B) Ammonium hydroxide

C) Alcohol

D) Sodium bicarbonate

 

Question 18

The electrolyte preferred in the electroplating an article with Silver

A) Silver chloride

B) Sodium Argento (Silver) Cyanide

C) Silver nitrate

D) Silver sulphate

 

Question 19

During electrolysis process the electrons lost by the cathode is ________  the electrons gained by the anode.

A) equal to

B) less than

C) greater than

D) independent of

 

Question 20

Electroplating is the process in which an _______ metal is coated on a __________ metal.

A) inert, expensive

B) expensive, baser

C) baser, inert

D) active, inert