True False[1 Marks ]

Question 11 Mark

Mixing baking soda with lemon juice is a chemical change.

Answer

true

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Question 21 Mark

The process of converting leaves into compost is a chemical change.

Answer

true

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Question 31 Mark

Collecting water vapour by condensing involves a chemical change.

Answer

false : collecting water vapour by condensing involves a physical change.

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Question 41 Mark

Melting of wax is necessary for burning a candle.

Answer

true

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Question 51 Mark

Combustion occurs in presence of carbon dioxide.

Answer

false

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Question 61 Mark

Burning of candle involves physical change only.

Answer

false

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Question 71 Mark

In physical changes, new substances are formed.

Answer

false

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Question 81 Mark

Formation of clouds is a reversible change.

Answer

true

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Question 91 Mark

Cooking of rice is a physical change.

Answer

false

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Question 101 Mark

The rusting of iron is reversible.

Answer

false

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Question 111 Mark

Crushing a chalk piece is a physical change.

Answer

true

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Question 121 Mark

The process of making curd from milk is a chemical change.

Answer

true

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Question 131 Mark

Boiling water results in a chemical change.

Answer

false

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Question 141 Mark

Combustion is a chemical change.

Answer

true

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Question 151 Mark

Rusting of iron is a physical change.

Answer

false

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Question 161 Mark

Cutting vegetables is a physical change.

Answer

true

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Question 171 Mark

The melting of ice is a chemical change.

Answer

false

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Science True False[1 Marks ]

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