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

    Ordinary starch stirred with cold water will result in a

    Batra Sahab

    (a) Starch forms a colloidal solution in water. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

    (a) Starch forms a colloidal solution in water.

    https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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  2. Asked: In:

    Which of the following is not a colloid?

    Batra Sahab

    (b) Sulphur forms a true solution in CS2. Others form colloidal solution. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

    (b) Sulphur forms a true solution in CS2. Others form colloidal solution.

    https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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  3. Asked: In:

    The first atomic theory was put forward by

    Batra Sahab

    (b) John Dalton put forward the first atomic theory. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-3/

    (b) John Dalton put forward the first atomic theory.

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

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  4. Asked: In:

    The relative mass of a molecule is expressed in

    Batra Sahab

    (c) Relative mass of a molecule is expressed in atomic mass units. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-3/

    (c) Relative mass of a molecule is expressed in atomic mass units.

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

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  6. 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-curiosity-chapter-3/

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

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

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  7. 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-curiosity-chapter-3/

    (d) Al is the correct symbol for aluminium.

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

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  8. 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-curiosity-chapter-3/

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

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

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  9. 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-curiosity-chapter-3/

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

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

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  11. 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-curiosity-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-curiosity-chapter-3/

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  12. Asked: In:

    Alloys are mixtures of (i) two metals. (ii) a metal and a non-metal. (iii) two non-metals. (iv) a metal and mercury.

    Batra Sahab

    The correct answer is (c) (i) and (iv). https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

    The correct answer is (c) (i) and (iv).

    https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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