I. Yellow flames are ideal for heating. |
II. The substances which vaporise during burning give flames. |
III. Luminous zone contains unburnt carbon particles. |
IV. The non-luminous zone has highest temperature. |
A) I, II and III
B) I, II and IV
C) II, III and IV
D) I, III and IV
Correct Answer: C
Solution :
Blue flame is much hotter than yellow flame. Yellow flame is not hot enough and it will leave blackish ring at the bottom of the substance on heating.You need to login to perform this action.
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