ICSE Class 11 Chemistry by Pavan | Practice Test to Test Your Knowledge
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ICSE Class 11 Chemistry

ICSE Class 11 Chemistry

Complete mock test including Atomic Structure, Chemical Bonding, and Organic Chemistry basics. Contains theory questions and numerical problems.

2025-07-19
Pavan Pavan
ICSE Class 11 Chemistry Grade 11

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

Why is chemistry considered an important science?

A
It deals with the study of living organisms
B
It helps in understanding the composition and properties of matter
C
It studies the behavior of planets
D
It focuses on economic systems

What is matter?

A
Anything that has mass and occupies space
B
A form of energy
C
Only solids
D
Substances that do not have mass

What does Dalton’s atomic theory primarily explain?

A
The behavior of gases
B
The structure of the atom
C
The concept of elements, atoms, and molecules
D
The concept of ions and their formation

Which of the following is true according to Dalton’s atomic theory?

A
Atoms of different elements are identical in size and mass
B
Atoms cannot combine to form compounds
C
Atoms of the same element are identical in mass and properties
D
Atoms can be divided into smaller particles

What are molecules?

A
The smallest indivisible particles of an element
B
Atoms of different elements bonded together
C
The smallest unit of a chemical compound formed from atoms
D
Only the atoms of gases

What is the molecular mass of a substance?

A
The mass of a molecule of a substance relative to the mass of a carbon-12 atom
B
The mass of a substance's atoms added together
C
The number of moles of molecules in a given mass
D
The mass of one mole of a substance

What is the mole concept?

A
A method to measure the volume of a substance
B
A concept that relates the amount of substance to its mass
C
A method to calculate the number of atoms in a given volume
D
A method to convert grams into moles

What is the value of one mole of a substance?

A
6.022 x 10^23 atoms or molecules
B
22.4 liters of gas at STP
C
The atomic mass of a substance
D
The molecular mass of the substance

What is the molar mass of a substance?

A
The number of moles in a given sample of the substance
B
The mass of one mole of a substance
C
The mass of one molecule of a substance
D
The total mass of atoms in a molecule

What is percentage composition in chemistry?

A
The ratio of the total mass of a substance to its volume
B
The mass of each element in a compound divided by the total mass of the compound
C
The ratio of the mass of a substance to its density
D
The mass of each element in a compound multiplied by 100

What is the empirical formula?

A
The formula showing the simplest ratio of elements in a compound
B
The formula showing the exact number of atoms of each element in a molecule
C
The formula representing a compound's molecular mass
D
The formula showing the percentage composition of elements

What is the molecular formula?

A
The formula showing the simplest ratio of elements in a compound
B
The formula showing the actual number of atoms of each element in a molecule
C
The ratio of mass of elements in a compound
D
The formula used to calculate the moles of atoms in a sample

What does stoichiometry in chemistry refer to?

A
The study of the quantities involved in chemical reactions
B
The measurement of the volume of a substance
C
The calculation of the density of a substance
D
The study of chemical properties

What is the first step in stoichiometric calculations?

A
Balancing the chemical equation
B
Measuring the mass of reactants
C
Converting moles to grams
D
Finding the molar mass of reactants

Which of the following is the correct unit for molar mass?

A
kg/mol
B
mol/kg
C
g/mol
D
mol

How do you calculate the amount of a substance in moles?

A
By dividing the mass of the substance by its molar mass
B
By multiplying the mass of the substance by its molar mass
C
By dividing the volume of the substance by its molar mass
D
By multiplying the volume of the substance by its molar mass

What is the formula to calculate the number of molecules in a given mole of a substance?

A
Number of molecules = Moles x Avogadro's number
B
Number of molecules = Moles x Mass
C
Number of molecules = Moles / Mass
D
Number of molecules = Mass / Avogadro's number

What is the empirical formula of a compound?

A
The formula that shows the simplest whole-number ratio of elements
B
The formula that shows the actual number of atoms of each element
C
The formula that shows the percentage composition of elements
D
The formula that shows the mass of elements in a compound

Which of the following is an example of a mole-to-mole stoichiometric ratio?

A
2 moles of A react with 1 mole of B
B
1 mole of A reacts with 2 moles of B
C
1 mole of A reacts with 1 mole of B
D
2 moles of A react with 3 moles of B

What is the molar volume of an ideal gas at STP?

A
22.4 L
B
1 L
C
10 L
D
0.5 L

What does the term 'stoichiometry' refer to?

A
The calculation of relative atomic masses
B
The study of the relationship between the amounts of reactants and products in a chemical reaction
C
The calculation of energy released in a reaction
D
The determination of the molecular structure of compounds

How do you calculate the empirical formula from the percentage composition of elements?

A
Convert mass percentages to moles and find the simplest ratio
B
Multiply the mass percentages by the atomic masses
C
Find the molecular formula and divide by the molar mass
D
Determine the molar volume and divide by the atomic masses

What is the primary purpose of stoichiometric calculations?

A
To determine the number of molecules in a sample
B
To determine the mass and volume of reactants and products
C
To calculate the concentration of a solution
D
To identify the molecular structure of substances

Which of the following is a correct way to express a mole-to-mole relationship?

A
1 mole of A reacts with 2 moles of B
B
The relationship between reactants and products is based on their masses
C
1 mole of A reacts with 3 moles of B
D
The reaction does not depend on the number of moles of substances

Which of the following is true for the empirical formula of a compound?

A
It gives the actual number of atoms of each element in the compound
B
It shows the simplest whole-number ratio of elements
C
It is the same as the molecular formula
D
It is calculated from the molar mass of a substance

Which of the following is a primary use of the mole concept?

A
To calculate the volume of a solution
B
To calculate the number of atoms or molecules in a sample
C
To calculate the chemical properties of elements
D
To calculate the temperature of a substance

How do you calculate the empirical formula from the molecular formula?

A
By dividing the molecular formula by the molar mass
B
By finding the simplest whole-number ratio of elements
C
By multiplying the molecular formula by the atomic masses
D
By determining the molecular volume

What is the formula for calculating the number of moles of a substance?

A
Number of moles = Mass / Molar mass
B
Number of moles = Volume / Molar volume
C
Number of moles = Density / Volume
D
Number of moles = Molar mass / Mass

What is the molecular formula for a compound?

A
It represents the actual number of atoms of each element in a molecule
B
It represents the simplest whole-number ratio of elements in a compound
C
It is the ratio of mass of the elements in the compound
D
It gives the density of the compound

What is the primary goal of stoichiometric calculations?

A
To find the temperature of the reaction
B
To determine the amount of reactants and products involved in a reaction
C
To calculate the volume of gases involved
D
To measure the heat released in the reaction