MCQ on Chemical Reaction and Equation

CBSE 10th Class MCQ CBSE NCERT 10th Class MCQ on Science

11- The number of atoms of each elements remains the same before and after a……………….

(A) Properties reaction

(B) Displacement reaction

(C) Decomposition reaction

(D) Chemical reaction


12- A ………………… equation has equal numbers of atoms for each element involved in the reaction are presented on the reactant and product sides.

(A) Normal chemical

(B) Proportional chemical

(C) Unbalanced chemical

(D) Balanced chemical


13- Represent the word equation into chemical equation.

Zinc + Sulphuric acid →Zinc Sulphate + Hydrogen


(A) Zn + H2SO4 → ZnSO4 + H2

(B) Zn + H4 SO4 → ZnSO4 + H2

(C) Zn + H2 SO4 → ZnSO4 + H

(D) Zn + H2SO4 → ZnSO6 + H2

14-The method of balancing chemical equation is called

(A) Chemical oxidation and reduction

(B) Hit and trial method

(C) Tripping

(D) None of the above


15- In hit and trial method, we make trials to balance the equation by using the smallest whole number ………………

(A) Balanced

(B) Variations

(C) Coefficient

(D) None of the above


16- If the reactant or product is present as a solution in water then the word aqueous is written as

(A) a

(B) qa

(C) aq

(D) H2O


17- In the given balanced equation the g is used with H2O to indicates that in this reaction

3Fe(s) + 4H2O (g) → Fe3O4(s) +4 H2 (g)


(A) Water is used in form of steam

(B) Water is used in form of liquid

(C) Water is used in form of solid

(D) None of the above


18- Which of the following reaction are used on below and above the arrow in the equation?

(A) Temperature

(B) Pressure

(C) Catalyst

(D) All of the above


19- A reaction in which a single product is formed from two or more reactants is known as

(A) Reactants

(B)  Products

(C) Combination reaction

(D) None of the above


20- CaO(s) + H2O (l) →Ca (OH)2 (aq)

In this reaction CaO(s) is

(A) Glucose

(B) Calcium carbonate

(C) Slaked lime

(D) Quick lime



11-(D), 12-(D), 13-(A), 14-(B), 15-(C), 16-(C), 17-(A), 18-(D), 19-(C), 20-(D)