S1: The minimum thermometer has a large bore and its fluid is colourless alcohol. S6: The daily temperature is recorded since a permanent, continuous record of temperature is desired. P: When the meniscus moves up the bore it leaves the index behind to register the lowest temperature. Q: Resetting the dumbbell of the minimum thermometer is accompanied by the action of inverting the stem until the index slides down to the meniscus. R: A tiny, dark index in the shape of a long dumbbell is placed in the bore below the top of the alcohol column. S: It is mounted horizontally and as the alcohol contracts with the decreasing temperature the meniscus of the alcohol pulls the index down.
A.Q S R P
B.Q P R S
C.S Q R P
D.S R Q P✓ Correct
Explanation
After S1 introduces the minimum thermometer with its alcohol-filled bore, S is the natural next step explaining 'It is mounted horizontally and as the alcohol contracts...the meniscus pulls the index down'. R then introduces the dumbbell-shaped index placed in the bore. Q follows describing how the dumbbell is reset by inverting the stem. Finally, P explains that when the meniscus moves up, the index stays behind to register the lowest temperature, leading naturally to S6 about daily temperature recording. Hence the correct order is S R Q P, option (d).
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