Answer:
Ice is a solid form of liquid. Water simply expands when it freezes.
The same amount of water for each shape of ice because the melting rate of ice depends on the surface area of each shape. So the same amount of water or volume with a large surface area will remain frozen for longer time.
the density increases down the group.
The reagent which limits the reaction is called limiting reagents.
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For example:- N2+3H2gives 2NH3.so here nitrogen limits the reaction.