Q.

In liquid thermometers

 i) a liquid is used as thermometric substance

  ii) thermal expansion of liquid is utilized to measure temperature

  iii) a solid is used as thermometric substance

iv) are used only to measure temperature of liquids

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a

All are correct

b

iii, iv are correct

c

i, ii are correct 

d

ii, iii are correct

answer is B.

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Detailed Solution

Liquid thermometers are based on the thermal expansion of liquids. In these thermometers some liquid is used as thermometric substance

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In liquid thermometers i) a liquid is used as thermometric substance  ii) thermal expansion of liquid is utilized to measure temperature  iii) a solid is used as thermometric substanceiv) are used only to measure temperature of liquids