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Some Basic Concepts of Chemistry

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

Mole Concept and Molar Masses

Subtopic

Mole Concept and Molar Masses under Some Basic Concepts of Chemistry for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Calculate the mass of 10 moles of Hydrogen gas (H2H_{2}).

    A.

    10 g

    B.

    20 g

    C.

    1 g

    D.

    5 g

  2. 2.

    What is the molar mass of Magnesium Oxide (MgOMgO)? (Atomic masses: Mg=24,O=16Mg=24, O=16)

    A.

    40 g/mol

    B.

    32 g/mol

    C.

    56 g/mol

    D.

    48 g/mol

  3. 3.

    How many molecules are present in 2.2 grams of CO2CO_{2}? (Molar mass of CO2=44CO_{2} = 44 g/mol)

    A.

    0.05×6.022×10230.05 \times 6.022 \times 10^{23}

    B.

    0.5×6.022×10230.5 \times 6.022 \times 10^{23}

    C.

    0.1×6.022×10230.1 \times 6.022 \times 10^{23}

    D.

    2.2×6.022×10232.2 \times 6.022 \times 10^{23}

Download the worksheet for Some Basic Concepts of Chemistry - Mole Concept and Molar Masses to practice offline. It includes additional chapter-level practice questions.

Stoichiometry and Stoichiometric Calculations

Subtopic

Stoichiometry and Stoichiometric Calculations under Some Basic Concepts of Chemistry for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the molar mass of Nitric Acid (HNO3HNO_{3})? (Atomic masses: H=1,N=14,O=16H = 1, N = 14, O = 16)

    A.

    63 g/mol

    B.

    48 g/mol

    C.

    31 g/mol

    D.

    52 g/mol

  2. 2.

    Which of the following has the same empirical formula as Ethyne (C2H2C_{2}H_{2})?

    A.

    Methane (CH4CH_{4})

    B.

    Ethane (C2H6C_{2}H_{6})

    C.

    Benzene (C6H6C_{6}H_{6})

    D.

    Ethene (C2H4C_{2}H_{4})

  3. 3.

    In the reaction Zn+2HCl→ZnCl2+H2Zn + 2HCl \rightarrow ZnCl_{2} + H_{2}, what volume of H2H_{2} at STP is produced from 1 mole of Zinc?

    A.

    11.2 L

    B.

    22.4 L

    C.

    44.8 L

    D.

    5.6 L

Download the worksheet for Some Basic Concepts of Chemistry - Stoichiometry and Stoichiometric Calculations to practice offline. It includes additional chapter-level practice questions.

Empirical and Molecular Formula

Subtopic

Empirical and Molecular Formula under Some Basic Concepts of Chemistry for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Find the molecular formula of a substance with empirical formula CHCH and a molecular mass of 78.

    A.

    C2H2C_2H_2

    B.

    C4H4C_4H_4

    C.

    C6H6C_6H_6

    D.

    C10H8C_{10}H_8

  2. 2.

    Diborane has the molecular formula B2H6B_2H_6. What is its empirical formula?

    A.

    BHBH

    B.

    BH2BH_2

    C.

    BH3BH_3

    D.

    B2H3B_2H_3

  3. 3.

    What is the empirical formula of the sulfur molecule S8S_8?

    A.

    SS

    B.

    S2S_2

    C.

    S4S_4

    D.

    S8S_8

Download the worksheet for Some Basic Concepts of Chemistry - Empirical and Molecular Formula to practice offline. It includes additional chapter-level practice questions.

Laws of Chemical Combination

Subtopic

Laws of Chemical Combination under Some Basic Concepts of Chemistry for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Avogadro's Law provides a relationship between:

    A.

    Volume and Temperature

    B.

    Volume and Pressure

    C.

    Volume and Number of Molecules

    D.

    Mass and Temperature

  2. 2.

    Which law was given by Richter in 1792?

    A.

    Law of Multiple Proportions

    B.

    Law of Definite Proportions

    C.

    Law of Reciprocal Proportions

    D.

    Gay-Lussac's Law

  3. 3.

    According to the Law of Conservation of Mass, in the reaction: 2H2+O2→2H2O2H_{2} + O_{2} \rightarrow 2H_{2}O, if 44 g of H2H_{2} reacts with 3232 g of O2O_{2}, the mass of H2OH_{2}O produced is:

    A.

    18 g

    B.

    32 g

    C.

    36 g

    D.

    40 g

Download the worksheet for Some Basic Concepts of Chemistry - Laws of Chemical Combination to practice offline. It includes additional chapter-level practice questions.

Some Basic Concepts of Chemistry - Class 11 Chemistry (ICSE) | Krit.club