Q.

The absolute zero is the temperature at which.

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a

all substances exist in solid state 

b

none of the above

c

water freezes 

d

molecular motion ceases

answer is C.

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Detailed Solution

Absolute zero is temperature at which a thermodynamic system has the lowest energy. That is average kinetic energy of molecules is zero . It corresponds to −273.15 °C on the Celsius temperature scale and to −459.67 °F on the Fahrenheit temperature scale.

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