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Question

Density of ice is ______ compared to density of water.

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is
less

Ice Density Comparison with Water

The density of ice is less compared to the density of water.

Reasoning for Lower Ice Density

When water freezes, its molecules arrange themselves into a crystalline lattice structure due to hydrogen bonding. This structure holds the molecules farther apart on average compared to the more closely packed arrangement in liquid water.

Because the same mass occupies a larger volume in ice, its density (mass per unit volume) is lower.

  • Density of ice is approximately \(917 \, \text{kg/m}^3\).
  • Density of water (at 4°C) is approximately \(1000 \, \text{kg/m}^3\).

This lower density is why ice floats on water, a crucial property for aquatic life in cold climates.

Conclusion

Therefore, the density of ice is significantly less than that of water.

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