10TH CBSE Chemical Reactions and Equations QUIZ

Chemistry MCQ Test

Chemical Reactions & Physical / Chemical Changes

13 Questions

Q1. The substances that are formed after completion of the reaction are called

(a) Catalysts (b) Reactants (c) Reagents (d) Products

Q2. The substances that are formed after completion of the reaction are called

(a) Catalysts (b) Reactants (c) Reagents (d) Products

Q3. The symbol used to denote a liquid reactant or product in a reaction is

(a) (s) (b) (aq) (c) (g) (d) (l)

Q4. Dissolving of quick lime in water is accompanied by

(a) Formation of precipitate (b) Evolution of heat (c) Change in colour (d) Change in state

Q5. A drop of colourless liquid is poured over blue litmus paper and it turns to red. The colourless liquid is

(a) Sodium chloride solution (b) Pure water (c) Potassium hydroxide solution (d) Dilute hydrochloric acid

Q6. Which of the following feature is common to both physical and chemical change?

(a) Evolution of hydrogen gas (b) Formation of new precipitate (c) Evolution of carbon dioxide (d) Change in state and colour

Q7. An example of a physical change is

(a) Burning of coal (b) Boiling of water (c) Reaction between lime and water (d) Burning of magnesium ribbon

Q8. Freezing of water is a

(a) Physical change (b) Chemical change (c) Both physical and chemical change (d) Exothermic reaction

Q9. During an exothermic reaction

(a) Heat is absorbed (b) There is no heat transfer (c) Heat can either be absorbed or evolved (d) Heat is evolved

Q10. Reaction between Ammonium chloride and Barium hydroxide is

(a) Exothermic reaction (b) Chemical change (c) Endothermic reaction (d) None of these

Q11. When carbon dioxide is passed through lime water

(a) Calcium hydroxide is formed (b) White precipitate of CaO is formed (c) Lime water turns milky (d) Colour of lime water disappears

Q12. When a magnesium ribbon is burnt in air, the ash formed is

(a) Pink (b) White (c) Black (d) Yellow

Q13. Fatty foods become rancid due to the process of

(a) Corrosion (b) Reduction (c) Hydrogenation (d) Oxidation

Test Result

Correct Answers