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One fixed point of temperature used in the absolute scale is

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the triple point of water which is assigned a value of ${98.4}^{\circ} C$

the melting point of ice which is assigned a value of $100^{\circ} C$

the boiling points of water under normal pressure which is assigned a value of $73^{0} C$

the triple point of water which is assigned a value of + 273.16 K

answer is D.

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Detailed Solution

In modern thermometry the temperature of triple point of water is one of ideal fixed point. i. e 273.15k

Why not : -

$(A) Triple point of water is 0^{\circ} C and not equal to {98.4}^{\circ} C$

$(B)Melting point of ice is 0^{\circ} C$

$(C)Boiling point of water is 100^{\circ} C$

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