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Question (11)

QN001051

Which of the following pairs represents physical changes only?

(A) Burning wood and rusting
(B) Melting ice and boiling water
(C) Cooking food and curdling milk
(D) Burning magnesium and melting wax

Correct Answer: B

Explanation:

Both involve only change of state.

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Question (12)

QN001052

A student cuts vegetables into smaller pieces. Which statement is correct?

(A) New vegetables are formed
(B) The composition changes completely
(C) Only size and shape change
(D) It becomes a chemical change

Correct Answer: C

Explanation:

Cutting changes only physical properties.

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Question (13)

QN001053

Which change can most easily be reversed?

(A) Burning paper
(B) Making popcorn
(C) Melting chocolate
(D) Cooking rice

Correct Answer: C

Explanation:

Melted chocolate can solidify again.

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Question (14)

QN001054

When water freezes into ice, the particles

(A) become a new substance
(B) disappear
(C) remain water particles
(D) change into oxygen

Correct Answer: C

Explanation:

Ice and water contain the same particles.

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Question (15)

QN001055

Which observation best indicates that only a physical change has occurred?

(A) Gas is produced
(B) A precipitate forms
(C) Only shape changes
(D) Colour changes permanently

Correct Answer: C

Explanation:

Shape change alone suggests a physical change.

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Question (16)

QN001056

A student melts candle wax and allows it to cool again. What is obtained?

(A) Ash
(B) A new substance
(C) Solid wax again
(D) Carbon dioxide

Correct Answer: C

Explanation:

Wax solidifies again on cooling.

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Question (17)

QN001057

Which of the following is NOT a physical property?

(A) Shape
(B) Size
(C) State
(D) Ability to rust

Correct Answer: D

Explanation:

Rusting is a chemical property.

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Question (18)

QN001058

Water exists in solid, liquid, and gaseous states. This shows that

(A) water changes into different substances
(B) physical changes can involve change of state
(C) gases are not matter
(D) water is chemically unstable

Correct Answer: B

Explanation:

Water changes state physically.

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Question (19)

QN001059

Which activity from daily life represents a physical change?

(A) Baking a cake
(B) Ripening mangoes
(C) Inflating a football
(D) Burning crackers

Correct Answer: C

Explanation:

Inflating changes only shape and size.

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Question (20)

QN001060

A student tears a sheet of paper into pieces. Which statement is correct?

(A) Chemical properties change
(B) New paper is formed
(C) Only physical properties change
(D) Heat is necessary for the change

Correct Answer: C

Explanation:

Tearing changes only the size and shape.

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Question (11)

Which of the following pairs represents physical changes only?

Explanation:

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Question (12)

A student cuts vegetables into smaller pieces. Which statement is correct?

Explanation:

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Question (13)

Which change can most easily be reversed?

Explanation:

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Question (14)

When water freezes into ice, the particles

Explanation:

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Question (15)

Which observation best indicates that only a physical change has occurred?

Explanation:

Link:

Question (16)

A student melts candle wax and allows it to cool again. What is obtained?

Explanation:

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Question (17)

Which of the following is NOT a physical property?

Explanation:

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Question (18)

Water exists in solid, liquid, and gaseous states. This shows that

Explanation:

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Question (19)

Which activity from daily life represents a physical change?

Explanation:

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Question (20)

A student tears a sheet of paper into pieces. Which statement is correct?

Explanation:

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