A) \[X<Y<Z\]
B) \[Z<Y<X\]
C) \[Z<X<Y\]
D) \[Y<X<Z\]
Correct Answer: A
Solution :
The ignition temperature of a substance is the minimum temperature at which a substance catches fire or starts burning. While X burns on little heating, Y and Z do not burn. This shows that the ignition temperature of X is lower than that of Y and Z. On further heating of Y and Z, it was found that Y had caught fire at a temperature that was lower than Z (as the latter does not start burning). Thus, it can be concluded that the ignition temperature of Y is lower than that of Z. Hence, the correct arrangement of the substances (X, Y, and Z) in order of their increasing ignition temperatures is\[X<Y<Z\]. The correct answer is A.You need to login to perform this action.
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