Question

6. Which one is correct about expansion of water?

A) its density is minimum at 4°c (B)
its volume is maximum at 4°c.
C)
its expands when heated from 0°c to 4°c
D)
its has its minimum volume at 4°c
7. If a hole is bored on a sheet of metal. When the sheet is heated, the hole
A) increases in size.
B) decreases in size. C)
remains the same in size
D) no one can tell
8. A steel tape of correct length at 15°c is used to measure distance on a day when the
temperature is 10°c. the result is
A) larger
B) smaller
C) the same
D) it depends on the type of the metal.
9.How much heat is required to heat 6kg of water from 10°c to 20°c?
C) 2.52 x 10'J B)
A) 200J
2J
D) 1200J
200

Answer 1

Water expands when heated within the temperature range of 0°C to 4°C, and its maximum density occurs at 4°C.

Step-by-step explanation:

The correct statements about the expansion of water are:

1. Its density is minimum at 4°C: Water reaches its maximum density at 4°C, meaning it is least dense at this temperature. As water is heated or cooled from 4°C, its density increases.
2. Its volume is maximum at 4°C: Water expands when heated from 0°C to 4°C, so its volume is greatest at 4°C.
3. The expansion of water when heated from 0°C to 4°C: As mentioned earlier, water expands when heated within this temperature range.

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