Question

Statement (A):The constant temperature at which a solid change into liquid state by absorbing heat energy is called melting point.

Statement (B): The constant temperature at which a liquid changes into gaseous state by absorbing heat energy is called point.

Statement (C): The melting and boiling points of a pure substance is always a constant and is a good measure of finding the purity of the substance.

• A. All the statement are correct
• B. All the statement are incorrect
• C. A, B are correct and C is incorrect
• D. A, B are incorrect and C is correct

Answer 1

The correct option is A All the statement are correct

$A\to$ Its defination of melting point.

$B\to$ Its defination of boiling point.

$C\to$ Pure substance have constant boiling and melting point.

$\therefore$ All are true.