Ncert Exercises & Solutions

During summers in India, one of the common practice to keep cool is to make ice balls of crushed ice, dip it in flavoured sugar syrup and sip it. For this, a stick is inserted into crushed ice and is squeezed into the palm to make it into the ball. Equivalently in winter in those areas where it snows, people make snowballs and throw around. Explain the formation of a ball out of crushed ice or snow in the light of PT diagram of water.

Hint: Apply the concept of change of state of water.

Refer to the P-T diagram of water and double-headed arrow. Increasing pressure at 0°C and 1 atm take ice into the liquid state and decreasing pressure in the liquid state at O°C and 1 atm takes water to the ice state.

When crushed ice is squeezed, some of it melts, filling up gap between ice flakes. Upon releasing pressure, this water freezes, binding all ice flakes and making the ball more stable.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions