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Chemistry

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

The Language of Chemistry (Symbols, Valency, Chemical Formulae, Equations)

Subtopic

The Language of Chemistry (Symbols, Valency, Chemical Formulae, Equations) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following elements exhibits variable valency?

    A.

    Sodium

    B.

    Magnesium

    C.

    Copper

    D.

    Aluminium

  2. 2.

    What is the symbol of the element Fluorine?

    A.

    Fl

    B.

    F

    C.

    Fu

    D.

    Fe

  3. 3.

    Which of these represents a balanced equation for the formation of water?

    A.

    H2+O2→H2OH_{2} + O_{2} \rightarrow H_{2}O

    B.

    2H2+O2→2H2O2H_{2} + O_{2} \rightarrow 2H_{2}O

    C.

    H2+O→H2OH_{2} + O \rightarrow H_{2}O

    D.

    2H+O→H2O2H + O \rightarrow H_{2}O

Download the worksheet for Chemistry - The Language of Chemistry (Symbols, Valency, Chemical Formulae, Equations) to practice offline. It includes additional chapter-level practice questions.

Chemical Changes and Reactions (Types of Reactions, Energy Changes)

Subtopic

Chemical Changes and Reactions (Types of Reactions, Energy Changes) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is an example of a chemical combination reaction?

    A.

    Burning of magnesium in oxygen

    B.

    Heating calcium carbonate

    C.

    Reaction of zinc with acid

    D.

    Electrolysis of water

  2. 2.

    A reaction that involves the decomposition of a compound by passing an electric current through it is called:

    A.

    Photolysis

    B.

    Thermolysis

    C.

    Electrolysis

    D.

    Neutralization

  3. 3.

    When iron nails are placed in a blue copper sulfate solution, the color of the solution changes to:

    A.

    Red

    B.

    Light green

    C.

    Yellow

    D.

    Colorless

Download the worksheet for Chemistry - Chemical Changes and Reactions (Types of Reactions, Energy Changes) to practice offline. It includes additional chapter-level practice questions.

Water (Physical/Chemical Properties, Hard and Soft Water)

Subtopic

Water (Physical/Chemical Properties, Hard and Soft Water) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the color of hydrated Ferrous sulphate (FeSO4.7H2OFeSO_4.7H_2O)?

    A.

    Blue

    B.

    White

    C.

    Green

    D.

    Pink

  2. 2.

    Adding impurities like common salt to water ______ its boiling point.

    A.

    Decreases

    B.

    Increases

    C.

    Does not change

    D.

    First increases then decreases

  3. 3.

    Which substance is used to test for the presence of water because it turns from white to blue?

    A.

    Anhydrous cobalt chloride

    B.

    Anhydrous copper sulphate

    C.

    Magnesium ribbon

    D.

    Pink litmus paper

Download the worksheet for Chemistry - Water (Physical/Chemical Properties, Hard and Soft Water) to practice offline. It includes additional chapter-level practice questions.

Atomic Structure and Chemical Bonding (Subatomic Particles, Isotopes, Octet Rule, Electrovalent/Covalent Bonds)

Subtopic

Atomic Structure and Chemical Bonding (Subatomic Particles, Isotopes, Octet Rule, Electrovalent/Covalent Bonds) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The bond in Carbon tetrachloride (CCl4CCl_4) is:

    A.

    Ionic

    B.

    Covalent

    C.

    Hydrogen bond

    D.

    Metallic

  2. 2.

    How many electrons are present in the valence shell of an Oxygen atom?

    A.

    2

    B.

    4

    C.

    6

    D.

    8

  3. 3.

    Which shell is closest to the nucleus?

    A.

    L shell

    B.

    M shell

    C.

    K shell

    D.

    N shell

Download the worksheet for Chemistry - Atomic Structure and Chemical Bonding (Subatomic Particles, Isotopes, Octet Rule, Electrovalent/Covalent Bonds) to practice offline. It includes additional chapter-level practice questions.

The Periodic Table (Modern Periodic Law, Groups and Periods)

Subtopic

The Periodic Table (Modern Periodic Law, Groups and Periods) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the valency of the Noble gases in Group 18?

    A.

    1

    B.

    8

    C.

    Zero

    D.

    2

  2. 2.

    Which of these elements is an Alkaline Earth Metal located in Period 2?

    A.

    Magnesium

    B.

    Calcium

    C.

    Beryllium

    D.

    Lithium

  3. 3.

    Which of these elements is a Halogen located in Period 2?

    A.

    Chlorine

    B.

    Fluorine

    C.

    Bromine

    D.

    Iodine

Download the worksheet for Chemistry - The Periodic Table (Modern Periodic Law, Groups and Periods) to practice offline. It includes additional chapter-level practice questions.

Study of the First Element - Hydrogen (Preparation, Properties, Oxidation/Reduction)

Subtopic

Study of the First Element - Hydrogen (Preparation, Properties, Oxidation/Reduction) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the mass of one mole of hydrogen atoms (approximately)?

    A.

    1 g

    B.

    2 g

    C.

    16 g

    D.

    4 g

  2. 2.

    Which of the following describes the bond formed between two hydrogen atoms in an H2H_2 molecule?

    A.

    Ionic bond

    B.

    Covalent bond

    C.

    Metallic bond

    D.

    Coordinate bond

  3. 3.

    During the Bosch process, how is carbon dioxide removed from the mixture of gases?

    A.

    By liquefaction

    B.

    By dissolving in water under high pressure

    C.

    By passing through ammoniacal cuprous chloride

    D.

    By passing through concentrated sulphuric acid

Download the worksheet for Chemistry - Study of the First Element - Hydrogen (Preparation, Properties, Oxidation/Reduction) to practice offline. It includes additional chapter-level practice questions.

Atmospheric Pollution (Acid Rain, Greenhouse Effect, Ozone Depletion)

Subtopic

Atmospheric Pollution (Acid Rain, Greenhouse Effect, Ozone Depletion) under Chemistry for Grade 9 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which gas is primarily produced by the combustion of high-sulfur coal?

    A.

    Methane

    B.

    Sulfur dioxide

    C.

    Nitrous oxide

    D.

    Helium

  2. 2.

    Which of the following reactions describes the formation of ozone?

    A.

    O2+O→O3O_{2} + O \rightarrow O_{3}

    B.

    O2+H2→H2OO_{2} + H_{2} \rightarrow H_{2}O

    C.

    CO+O→CO2CO + O \rightarrow CO_{2}

    D.

    N2+O2→2NON_{2} + O_{2} \rightarrow 2NO

  3. 3.

    Which part of the plant is most directly damaged by the acidity of acid rain?

    A.

    The fruit

    B.

    The waxy cuticle of leaves

    C.

    The root hair only

    D.

    The seeds

Download the worksheet for Chemistry - Atmospheric Pollution (Acid Rain, Greenhouse Effect, Ozone Depletion) to practice offline. It includes additional chapter-level practice questions.

Chemistry - ICSE Class 9 Science Notes & Revision | Krit.club