Question

Which of the following is a chemical change? * Bursting of a fire cracker Germination of seed Coal formation from buried plants All of these

Answer 1

Answer:

All of these

Explanation:

Answer 2

Answer:

All of the given options are the example of chemical change.

Explanation:

Chemical change : The process in which the physical and chemical properties of the substance is altered, is known as Chemical change. It happens due to the variation in the molecular arrangement, atomic composition of the substances.

• Bursting of firecrackers involves chemical reaction among the chemical substances present in them. Crackers contain sulphur, phosphorus, chromium etc. They react with oxygen and produce light ,heat and sound.

• Germination of seed involves activation of nutrients present in the seeds . These nutrients act as food for the seed .

• Coal is formed from buried plants deep beneath the earth's surface . In this process, high temperature and pressure alters the chemistry of the plant and it is converted into coal after a long period of time.