Question

(iii) If the temperature of water is decreased from 4 °C to 0 °C, then its
(a) volume decreases and density increases
(b) volume increases and density decreases
(c) volume decreases and density decreases
(d) volume increases and density increases
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Answer 1

The answer should be (c)
Because water has the highest density at 4 degrees so further decrease or increase of the temperature will result the water to have a lower density than at 4 degrees.
Also when the water decrease from 4 degree to 0 degrees the water molecules will tend to come close to each other which will cause a negligible amount of volume of water to decrease.
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Answer 2

d is correct option

Explanation:

here ice is changing to water hence volume increased

and ice floats on water that means density will also increase

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