To measure a temperature say around 400°C which of the following thermometers can be used most conveniently : (i) gas thermometer(ii) mercury thermometer(iii) platinum thermometer(iv) thermocouple
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a
(i, ii)
b
(i, iii)
c
(ii, iv)
d
(iii, iv)
answer is D.
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Detailed Solution
gas thermometer - small temperatures.mercury thermometer - < 2000Cplatinum thermometer 2000C to 10000C.thermocouple thermometer -2000C to 25000C