question_answer

A beaker is completely filled with water at \[4{}^\circ C.\] It will overflow if

A)  Heated above \[4{}^\circ C\]

B)  Cooled below \[4{}^\circ C\]

C)  Both heated and cooled above and below \[4{}^\circ C\] respectively

D)  None of the above

Correct Answer: C

Solution :

[c] Water has maximum density at \[4{}^\circ C,\] so if the water is heated above \[4{}^\circ C,\] or cooled below \[4{}^\circ C,\] density decreases, i.e., volume increases. In other words, it expands so it overflows in both the cases.