This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 1 Chemical Reactions And Equations – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What happens when sodium sulphate solution is mixed with the solution of barium chloride? A) No reaction takes place. B) Barium sulphate is formed. C) Sulphur dioxide gas is formed. D) Sodium sulphate is formed. Show Answer Correct Answer: B) Barium sulphate is formed. 2. A metal 'M' reacts with an acid according to the equation:M + H$^{+}$ ..... > M$^{3+ }$+ H$_{2}$$_{The metal can be }$ A) Potassium. B) Magnesium. C) Aluminium. D) Barium. Show Answer Correct Answer: C) Aluminium. 3. The representation of a chemical reaction with symbols and formulas is called ..... A) Chemical change. B) Chemical equation. C) Chemical reaction. D) None of these. Show Answer Correct Answer: B) Chemical equation. 4. Which of the following reactions is an endothermic reaction? A) Burning of coal. B) Decomposition of vegetable matter into compost. C) Process of respiration. D) Decomposition of calcium carbonate to form quicklime. Show Answer Correct Answer: D) Decomposition of calcium carbonate to form quicklime. 5. Reaction of Na and H$_{2}$O gives a very strong base, NaOH and another product, a gas. How do you test for this gas? A) Pass it through lime water, turns milky. B) Rotten egg smell. C) Burns with a dazzling flame. D) Burns with a pop sound. Show Answer Correct Answer: D) Burns with a pop sound. 6. Loss of electron happens in A) Reduction. B) Oxidation. C) None of these. D) None of the above. Show Answer Correct Answer: B) Oxidation. 7. Silver when exposed to air attain a blackish layer on it. The black substance is ..... A) Silver Chloride. B) Silver Oxide. C) Silver Bromide. D) Silver Sulphide. Show Answer Correct Answer: D) Silver Sulphide. 8. Rusting of an iron is an example of: A) Reduction. B) Ionization. C) Oxidation. D) Dissociation. Show Answer Correct Answer: C) Oxidation. 9. Dilute HCl is added to the granulated zinc taken in a test tube. The following observations are recorded. which is a correct observation? A) This is a type of decomposition reaction. B) HCl doesnt react with Zn. C) A colourless and odourless gas is released. D) A gas is released that turns lime water milky. Show Answer Correct Answer: C) A colourless and odourless gas is released. 10. Both CO2 and H2 gases are A) Heavier than air. B) Colourless. C) Acidic in nature. D) Soluble in water. Show Answer Correct Answer: B) Colourless. 11. Which of the following observations help us to determine whether a Chemical Reaction has taken place- A) Change in Color. B) Change in temperature. C) Evolution of Gas. D) All of These. Show Answer Correct Answer: D) All of These. 12. Which of the following product is formed when calcium oxide reacts with water? A) Slaked lime. B) Carbon dioxide. C) Calcium oxide. D) Oxygen gas. Show Answer Correct Answer: A) Slaked lime. 13. The substances listed on the left side of a chemical equation are the A) Products. B) Coefficients. C) Precipitates. D) Reactants. Show Answer Correct Answer: D) Reactants. 14. Which of the following gases is used in the storage of fat and oil containing foods for a long time? A) Carbondioxide gas. B) Nitrogen gas. C) Oxygen gas. D) Neon gas. Show Answer Correct Answer: B) Nitrogen gas. 15. Chemical reactions occur when ..... are broken and new bonds are formed. A) Mixtures. B) Osteoclasts. C) Physical bonds. D) Chemical bonds. Show Answer Correct Answer: D) Chemical bonds. 16. Before a chemical reaction, the total mass of two reactants is measured to be 40 grams. After the reaction, what should be the total mass of the products? A) 0 grams. B) 20 grams. C) 40 grams. D) 80 grams. Show Answer Correct Answer: C) 40 grams. 17. How many silver atoms are reactants in this equation?4Ag + 3O2 $\rightarrow$ 2Ag2O A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: C) 4. 18. When CaCO2 is heated the products are A) CAO + CO2. B) CaOH2. C) CA+ H2O. D) None of the above. Show Answer Correct Answer: A) CAO + CO2. 19. In a context of redox reactions, the removal of hydrogen from a substance is known as A) Oxidation. B) Reduction. C) Dehydration. D) Dehydrogenation. Show Answer Correct Answer: A) Oxidation. 20. A student added dilute HCl to a test tube containing zinc granules and made following observations: A) The zinc surface became dull and black. B) A gas evolved which burnt with a pop sound. C) The solution remained colourless. D) The solution becomes green in colour. Show Answer Correct Answer: B) A gas evolved which burnt with a pop sound. 21. Neutralisation reaction between an acid and base is a type of ..... A) Displacement reaction. B) Double displacement reaction. C) Addition reaction. D) Decomposition reaction. Show Answer Correct Answer: B) Double displacement reaction. 22. When does a chemical reaction take place? A) When a physical change occurs. B) When a chemical change occurs. C) Both a and b. D) None of the above. Show Answer Correct Answer: B) When a chemical change occurs. 23. What should be added to Pb(No$_{3}$)$_{2}$ to obtain a yellow precipitate: A) Potassium chloride. B) Potassium nitride. C) Potassium iodide. D) Potassium sulphide. E) None of these. Show Answer Correct Answer: C) Potassium iodide. 24. In chemical reactions, a product is ..... A) Any substance that is made of the greatest number of atoms. B) Any substance that is made from the least number of atoms. C) Any substance that is to the left of the arrow. D) Any substance to the right of the arrow. Show Answer Correct Answer: D) Any substance to the right of the arrow. 25. An unbalanced chemical equation is written in: A) Simple form. B) Proper form. C) Unorganized form. D) Skeletal form. Show Answer Correct Answer: D) Skeletal form. ← PreviousNext →Related QuizzesClass 10 Science Chapter 1 Chemical Reactions And Equations Quiz 1Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 2Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 3Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 4Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 5Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 6Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 7Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 9Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 10Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books