Question
Can there be a time-temperature graph as follows? Justify your answer.
Image

Answer

We know that if time is increasing, then temperature will either be increase or decrease or constant.
(i) Yes, it is the time-temperature graph, because it shows increase in temperature with increase in time.
(ii) Yes, it is the time-temperature graph, because it shows decrease in temperature with increase in time.
(iii) No, it is not the time-temperature graph, because it shows that at a particular time temperature increase (i.e. different temperature) which is not possible.
(iv) Yes, it is the time-temperature graph, because it shows that at different time (or increasing time) temperature is constant (or same).

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