MCQ on Chemical Reaction and Equation

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

MCQ on Chemical Reaction and Equation

1- Whenever a chemical change occurs, a chemical ………….. has taken place.

(A) Reaction

(B) Friction

(C) Equation

(D) Temperature


2- When a magnesium ribbon burns with a dazzling white fame and changes into a white powder. This white powder is …………………

(A) Magnesium oxide

(B) Magnesium reaction

(C) Magnesium carbonate

(D) None of the above


3- Magnesium ribbon is rubbed before burning because it has a coating of ………………

(A) Magnesium oxide

(B) Magnesium carbonate

(C) Magnesium zinc oxide

(D) None of the above


4- Which of the following reaction is taking place in this Equation?

Mg + O2 →  MgO

(A) Magnesium sulphate

(B) Magnesium carbonate

(C) Magnesium oxide

(D) Magnesium zinc


5- When a magnesium ribbon is burnt in oxygen it gets converted into magnesium oxide. The word equation for this reaction is

(A) Oxygen + Magnesium acid →Oxide magnesium

(B) Zinc + Oxygen → Zinc oxide

(C) Magnesium sulphate + Oxygen → Magnesium sulphate Oxide

(D) Magnesium + Oxygen → Magnesium Oxide


6- Magnesium + Oxide → Magnesium oxide

In this equation, product is written on which side of the arrow

(A) On left hand side

(B) On right hand side

(C) Product is not available

(D) Equation is wrong


7- Always the reactant are written on the …………….hand side in equation.

(A) Right

(B) Left

(C) Not any side of the equation

(D) Both A and B


8- Before burning in air, the …………….. is cleaned by rubbing with a sand paper to remove the layer of magnesium carbonate from the ribbon surface.

(A) Zinc ribbon

(B) Potassium ribbon

(C) Magnesium ribbon n

(D) All of the above


9- In ………………between sulphuric acid and barium chloride solution the white precipitation formed are of Barium sulphate.

(A) Properties

(B) Reaction

(C) Displacement

(D) Chemical reaction


10- Mass can neither be created nor destroyed in a chemical reaction. It is law of

(A) Conservation of Mass

(B) Conservation of Speed

(C) Conservation of Reaction

(D) Conservation of Chemical



1-(A), 2-(A), 3-(B), 4-(C), 5-(D), 6-(B), 7-(B), 8-(C), 9-(D), 10-(A)