Home/ Batra Sahab/Answers
  1. Asked: In:

    Mass can neither be created nor destroyed in a chemical reaction. This is the statement of a law called

    Batra Sahab

    (c) Law of conservation of mass is the correct answer. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

    (c) Law of conservation of mass is the correct answer.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

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    • 16
  2. Asked: In:

    The correct way of writing the symbol of aluminium is

    Batra Sahab

    (d) Al is the correct symbol for aluminium. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

    (d) Al is the correct symbol for aluminium.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

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    • 11
  3. Asked: In:

    According to Greek philosophers, the smallest particle of matter that could not be further subdivided was called

    Batra Sahab

    (b) Atom was the smallest particle of matter according to Greek philosophers. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

    (b) Atom was the smallest particle of matter according to Greek philosophers.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

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    • 23
  4. Asked: In:

    The law of constant proportion states :

    Batra Sahab

    (b) This is the correct statement of law of constant proportion. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

    (b) This is the correct statement of law of constant proportion.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

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    • 7
  6. Asked: In:

    The formula of calcium phosphate is

    Batra Sahab

    (d) Ca has the valency 2 and phosphate has the valency 3. Therefore, calcium phosphate has the formula Ca₃(PO₄)₂. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

    (d) Ca has the valency 2 and phosphate has the valency 3. Therefore, calcium phosphate has the formula Ca₃(PO₄)₂.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

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