Which of the following is/are the example/examples of chemical change? (1). Crystallization of sodium chloride (2). Melting of ice (3). Souring of milk Select the correct answer using the code given below.

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CollectorBabu · Accepted Answer

Correct Answer: 3 only. Chemical changes took place when chemical reactions among substances form new products. Crystallization of sodium chloride is incorrect as solubility of sodium chloride in water will not result in excess change in freezing and boiling points. Melting of ice is also incorrect as it is a physical change since it employs change in physical state of water from ice in solid state to water in liquid state. Souring of milk is a chemical change as it results in production of sour tasting lactic acid, so this is correct, hence option B is correct. Cooling crystallization via hollow fiber devices emerges as a new technology suitable for salt production from concentrated seawater brine. To generate high-quality NaCl crystals, a solid hollow fiber cooling crystallization (SHFCC) system was developed in this study using lab-made PVDF hollow fibers as the heat-exchanger and magnetic stirring as the downstream mixing device.

Which of the following is/are the example/examples of chemical change? (1). Crystallization of sodium chloride (2). Melting of ice (3). Souring of milk Select the correct answer using the code given below.

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