This online MCQ test for class 10 science
chapter 1 Chemical Reaction and Equations has been prepared by experienced
teachers.
Chapter 1 Chemistry Class 10 MCQ Online Test
Chemistry Chapter 1 class 10 MCQ online
test provides you an opportunity to enhance your knowledge and understanding
of the chapter.
You are advised to go through the chapter
Chemical Reaction and Equations.
Important Points
The decay of matter involves the formation of new substances and it is an irreversible process.
Decomposition reaction involves the breaking down of a complex substance into simple substances.
A double displacement reaction involves an exchange of ions between two compounds.
The main cause of rancidity is the oxidation of oil and fats present in food.
Rancidity can be prevented by storing food away from light, adding antioxidants, and keeping food in the refrigerator.
Calcium hydroxide is known as slaked lime.
A chemical reaction involves a state change, evolution of gas, and change in temperature.
Heat is evolved in exothermic reaction and heat is absorbed in endothermic reaction.
The melting of ice is an endothermic reaction.
Calcium oxide is used in making cement.
Silver bromide is used in black-and-white photography.
Copper acquires a green coating due to corrosion.
Water is decomposed when electricity is passed through it.
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