Question

The melting point of lead is 327.5 °C. Which two of the following statements are
correct?
A. Lead is a solid at 310 °C
B. Lead is a gas at 280 °C
C. Lead is a liquid at 390 °C
D. Lead is a liquid at 300 °C
​

Answer 1

Answer:

The two statements which are correct are -

A. Lead is a solid at 310°C

C. Lead is a liquid at 390°C

Answer 2

Answer:

Lead is a solid at 310 °C

Explanation:

Step 1: The melting point of a substance refers to that temperature in which the substance changes state from solid to liquid. The melting point of a substance, which is usually a temperature value, is that actual temperature the change of state occurs.

Step 2: According to this question, the melting point of Lead (Pb), which is naturally a solid metal, is 327.5°C. This means that LEAD (Pb) will only change to its liquid state at exactly 327.5°C and above. Therefore, at a temperature of 310°C, which is lower than lead's melting point, Lead element will still be a solid.

Step 3: Lead is transformed from a solid to a liquid via melting. The chemical makeup of the lead does not change; only its condition has changed. Thus, it merely demonstrates a physical change.

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