GK QUESTION#3181
At 25°C and approximately one atmosphere, consider the following statements.
1. Mercury has a boiling point of approximately 357°C.
2. Gallium is liquid.
3. Copper boils at 357°C.
Which statements are correct?
Show Answer
Answer
B. 1 only
Show Explanation
Explanation
At 25°C and approximately one atmosphere, gallium is solid because its melting point is about 29.76°C. Mercury boils at about 356.6°C, while copper’s boiling point is far higher. Only statement 1 is correct. Specifying 25°C avoids an ambiguous use of room temperature.