Question

Classify each of the following as a physical or chemical change . Give reason . (a) Drying of a shirt in the sun. (b) Rising of hot air over a radiator. (c) Buring of kerosence in a lantern . (d) Change in the colour of black tea on adding lemon juice in it.

Answer 1

a) physical change
b) physical change
c) chemical change
d) chemical change

Answer 2

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HI FRIEND
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◆ HERE IS YOUR ANSWER ◆

1. PHYSICAL CHANGE

● REASON ●

➡ IN THIS CHANGE THERE IS NO NEW SUBSTANCE IS PRODUCED AND IT CAN BE REVERSED
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2. PHYSICAL CHANGE

● REASON ●

➡ IT IS ALSO INVOLVING ONLY MOVEMENT OF AIR, NO CHANGE IN COMPOSTION OF AIR
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3. ♣ FIRST PHYSICAL CHANGE, WHEN KEROSENE VAPORISES

♣ AFTER THAT, BURNING OF KEROSENE IS A CHEMICAL CHANGE AS NEW PRODUCTS ARE FORMED

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4. PHYSICAL CHANGE

● REASON ●

➡ AS THERE OCCURS ONLY THE DISSOLUTION

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{ HOPE IT HELPS }

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