Question

A substance was analysed and found to have a boiling point of 450 °C. At room temperature it is a soft grey solid. Which temperature could be the melting point of a sample of the pure substance?

-12 °C
56 °C to 72 °C
250 °C to 275 °C
142 °C

Answer 1

The answer is

250°c-275°c

Answer 2

Answer:

142 degree celicus

Explanation:

Pure substance has a particular Melting and Boiling point. There are two unique temperatures. -12 and 142. -12 degree celicus is wrong as in the question it says it remains solid at room temperature, So answer is 142 degree celicus