search
arrow-left Previous
Next arrow-right
Q: Which of the following is NOT a chemical change?
  • A. Conversion of carbohydrate to energy
  • B. Converting water into steam
  • C. Making curd from milk
  • D. Heating coal
Correct Answer: Option B - When a substance combines with another substance to form a new substance or when a substance dissociates into two or more substances, it is called chemical changes these process are called chemical change which is often irreversible. Example- Rusting of Iron, buring of incense etc. All the changes in which there is no change in the chemical nature or chemical identites of the substance is termed as physical change. Example- converting water into steam, metting of wax etc.
B. When a substance combines with another substance to form a new substance or when a substance dissociates into two or more substances, it is called chemical changes these process are called chemical change which is often irreversible. Example- Rusting of Iron, buring of incense etc. All the changes in which there is no change in the chemical nature or chemical identites of the substance is termed as physical change. Example- converting water into steam, metting of wax etc.

Explanations:

When a substance combines with another substance to form a new substance or when a substance dissociates into two or more substances, it is called chemical changes these process are called chemical change which is often irreversible. Example- Rusting of Iron, buring of incense etc. All the changes in which there is no change in the chemical nature or chemical identites of the substance is termed as physical change. Example- converting water into steam, metting of wax etc.