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Subjects
Science State Board
Class 7
Chemistry in everyday life
Textbook questions
2.
Choose the correct answers II
Exercise condition:
2
m.
1
.
The lowest temperature at which a substance catch the fire is called its
boiling point
melting point
critical temperature
ignition temperature
2
.
Which is the hottest part in the flame of candle?
Blue
Yellow
Black
Way part
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