Four substances P, Q, R, and S were brought one by one near a lighted – McqOptions

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1.	Four substances P, Q, R, and S were brought one by one near a lighted candle. It was observed that only substance Q bums readily. Substances P and R burn after sustained heating and substance S does not bum at all. Among all the substances given, which substance has the lowest ignition temperature?
A.	P
B.	Q
C.	R
D.	S
Answer» C. R

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