Question

Какая из нижеприведенных явлений не является физическим1.прокисление молока 2.таяние льда 3.горение свечи4.излучение Света стирально электронной лампы 5.ржавление железа

Answer 1

Пятое, ржавление железа.

Answer 2

The phenomenon that is not a physical one is the rusting of iron.

To determine which of the given phenomena is not a physical one, let's briefly discuss each of them:

1. Acidification of milk: This is a chemical process where the milk reacts with an acid, causing it to curdle and change its properties. It is not a purely physical change.

2. Melting of ice: This is a physical process where solid ice changes into liquid water due to an increase in temperature. It does not involve any chemical reactions.

3. Burning of a candle: This is a chemical process known as combustion, where the wax in the candle reacts with oxygen in the air to produce heat, light, and various byproducts. It is not a purely physical change.

4. Emission of light from an electronic lamp: This is a physical process where an electric current passes through a gas or vapor inside the lamp, causing it to emit light. It does not involve any chemical reactions.

5. Rusting of iron: This is a chemical process where iron reacts with oxygen and moisture in the air to form iron oxide (rust). It is not a purely physical change.

Based on the above explanations, the phenomenon that is not a physical one is the rusting of iron. It involves a chemical reaction between iron, oxygen, and moisture in the air [[1]].

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