Exams › NEET › Chemistry

Which of the following does not result in an increase in entropy?

1. crystallisation of sucrose from solution
2. rusting of iron
3. conversion of ice to water
4. vapourisation of camphor

Correct answer: crystallisation of sucrose from solution

Solution

Crystallisation arranges dissolved sucrose molecules into an ordered solid lattice, so entropy decreases rather than increases. The other options involve greater disorder: rusting forms products from reactants, ice melting increases molecular freedom, and vapourisation greatly increases randomness.

Related NEET Chemistry questions

• An ideal gas is compressed in a closed container its U?
• Internal energy does not include
• Assertion The change in internal energy and change in heat enthalpy does not depend upon the path by which changes are brought in. Reason Both \( \Delta U \) and \( \Delta H \) are path independent as U and H are state functions.
• Liquid benzene burns in oxygen according to: \( 2 C_{6} H_{6}+15 O_{2} \rightarrow 12 C O_{2}+6 H_{2} O \) If density of liquid benzene is \( 0.88 \mathrm{g} / \mathrm{cc} \) what volume of \( \boldsymbol{O}_{2} \) at \( \mathrm{STP} \) is needed to complete the combustion of 39 cc of liquid benzene?
• When a bomb calorimeter is used to determine the heat of reaction, which property of the system under investigation is most likely to remain constant?
• When heat is given to gas in an isothermal change, the result will be

⚔️ Practice NEET Chemistry free + battle 1v1 →