MCQ
During which of the following changes a new substance is formed?
- ✓Cooking.
- BMelting.
- CFreezing.
- DCrushing.
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|
Bar
|
Part $P$
|
Part $Q$
|
|
$I$
|
Pushed
|
Pulled
|
|
$II$
|
Nothing happened
|
Nothing happened
|
|
$III$
|
Pulled
|
Pushed
|
|
$IV$
|
Pulled
|
Pulled
|
|
$(i)$
|
Respiration
|
|
$(ii)$
|
Combustion
|
|
$(iii)$
|
Burning
|