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Due to Anomalous expansion of water

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By Expert Faculty of Sri Chaitanya

aquatic animals can exist in cold countries

aquatic animals can die

water completely freezes

all of the above

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detailed solution

Correct option is A

density of water is maximum at 4 degree Centigrade, as atmosphere temperature falls, when atmosphere is at 4C ,top layer of water sinks to bottom of lake, as atmosphere temperature falls to 0 degree centigrade and top layer freezes but bottom layer of lake at 4C will remain in liquid state , where aqualife survive

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A glass vessel is partially filled with mercury and when both are heated together, the volume of the unfilled part of vessel remains constant at all temperature. Find the initial volume (in cm³) of mercury if the empty part measures 34 cm³ $[Given: α_{vessel} = 9 \times 10^{- 6} /^{\circ} C$ $γ_{Hg} = 18 \times 10^{- 5} /^{\circ} C]$