Three liquids with their respective boiling and freezing points are shown in the given table-LiquidsFreezing pointBoiling pointMercury -39-C 357-CAlcohol -112-C 78-CPentane -180-C 36-CA thermometer that can measure both -50-C and 38-C should be filled with -

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Physical Properties of Alcohols and Phenols

Three liquids...

Question

Three liquids with their respective boiling and freezing points are shown in the given table.
Liquids Freezing point Boiling point
Mercury $- 39^{\circ} C$ $357^{\circ} C$
Alcohol $- 112^{\circ} C$ $78^{\circ} C$
Pentane $- 180^{\circ} C$ $36^{\circ} C$
A thermometer that can measure both $- 50^{\circ} C$ and $38^{\circ} C$ should be filled with _________.

Mercury only

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Alcohol only

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Pentane only

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Either alcohol or pentane

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Solution

The correct option is B Alcohol only
According to the question the range of alcohol thermometer is $- 112^{\circ} C$ (freezing point) to $78^{\circ} C$ (boiling point). Hence it can be used to measure both $- 50^{\circ}$ and $38^{\circ} C$ .

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Liquids	Freezing point	Boiling point
Mercury	$- 39^{\circ} C$	$357^{\circ} C$
Alcohol	$- 112^{\circ} C$	$78^{\circ} C$
Pentane	$- 180^{\circ} C$	$36^{\circ} C$

Three liquids with their respective boiling and freezing points are shown in the given table.LiquidsFreezing pointBoiling pointMercury−39∘C357∘CAlcohol−112∘C78∘CPentane−180∘C36∘CA thermometer that can measure both −50∘C and 38∘C should be filled with _________.

The correct option is B Alcohol onlyAccording to the question the range of alcohol thermometer is −112∘C (freezing point) to 78∘C (boiling point). Hence it can be used to measure both −50∘ and 38∘C.

The correct option is B Alcohol only
According to the question the range of alcohol thermometer is $- 112^{\circ} C$ (freezing point) to $78^{\circ} C$ (boiling point). Hence it can be used to measure both $- 50^{\circ}$ and $38^{\circ} C$ .