This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 1 Chemical Reactions And Equations – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?(i) Displacement reaction(ii) Precipitation reaction(iii) Combination reaction(iv) Double displacement reaction A) (i) only. B) (ii) only. C) (iv) only. D) (ii) and (iv). Show Answer Correct Answer: D) (ii) and (iv). 2. During rancidity food is ..... A) Reduced. B) Oxidized. C) Combined. D) Decomposed. Show Answer Correct Answer: B) Oxidized. 3. COLOUR OF BARIUM SULPHATE PRECIPITATE: A) WHITE. B) BLUE. C) GREEN. D) YELLOW. Show Answer Correct Answer: A) WHITE. 4. The substances listed on the right side of a chemical equation are the A) Yields. B) Reactants. C) Products. D) Precipitates. Show Answer Correct Answer: C) Products. 5. Some stale food gives a bad taste and bad smell because of: A) Heating. B) Displacement. C) Corrosion. D) Rancidity. Show Answer Correct Answer: D) Rancidity. 6. Choose the correct balanced equation of barium chloride and aluminium sulphate. A) 3BACL2+Al2 (SO4) 3 $\rightarrow$ 3BASO4+2ALCL3. B) 2Bacl2+Al2 (SO4) 3 $\rightarrow$ 2BASO4+2ALCL3. C) 6BaCl2+2Al2(SO4)3$\rightarrow$6BaSO4+4AlCl3. D) None of the above. Show Answer Correct Answer: A) 3BACL2+Al2 (SO4) 3 $\rightarrow$ 3BASO4+2ALCL3. 7. Which of the following affect the rate of a chemical reaction? A) Temperature. B) Concentration. C) Catalysts. D) All choices. Show Answer Correct Answer: D) All choices. 8. Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observations are recorded. Point out the correct observation. A) The surface of metal becomes shining. B) The reaction mixture turns milky. C) Odour of a pungent smelling gas is recorded. D) A colourless and odourless gas is evolved. Show Answer Correct Answer: D) A colourless and odourless gas is evolved. 9. The chemical formula of lead sulphate is A) Pb$_{2}$SO$_{4}$. B) Pb(SO$_{4}$)$_{2}$. C) PbSO$_{4}$. D) Pb$_{2}$(SO$_{4}$)$_{3}$. Show Answer Correct Answer: C) PbSO$_{4}$. 10. What does the Law of Conservation of Mass state? A) Matter cannot be gained or lost in a chemical reaction. B) Matter can only be lost in a chemical reaction. C) Matter can only be gained in a chemical reaction. D) Matter can be gained and lost in a chemical reaction. Show Answer Correct Answer: A) Matter cannot be gained or lost in a chemical reaction. 11. White wash is prepared from A) Slaked lime. B) Quick lime. C) Anhydrous calcium chloride. D) Sodium chloride. Show Answer Correct Answer: B) Quick lime. 12. Reaction in which energy is abosorbed is called A) Endothermic reaction. B) Exothermic reaction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endothermic reaction. 13. Which is the most reactive element A) Helium. B) Potassium. C) Sodium. D) Calcium. Show Answer Correct Answer: B) Potassium. 14. The reaction of H2 gas with oxygen gas to form water is an example of A) Combination reaction. B) Redox reaction. C) Exothermic reaction. D) All of these reactions. Show Answer Correct Answer: A) Combination reaction. 15. Which among the following statement(s) is (are) true?Exposure of silver chloride to sunlight for a long duration turns grey due to(i) the formation of silver by decomposition of silver chloride(ii) sublimation of silver chloride(iii decomposition of chlorine gas from silver chloride(iv) oxidation of silver chloride A) (i) only. B) (i) and (iii). C) (ii) and (iii). D) (iv) only. Show Answer Correct Answer: A) (i) only. 16. When Ag is exposed to air it gets a black coating of: A) Lamb $ _ {3} $. B) AgCl. C) AG $ _ {2} $ s. D) Ag $ _ {2} $ co $ _ {3} $. Show Answer Correct Answer: C) AG $ _ {2} $ s. 17. MnO2 + 4HCl $\rightarrow$MnCl 2 + 2H2O + Cl2Identify the substance oxidized in the above. equation. A) MnCl2. B) HCl. C) H2O. D) MnO2. Show Answer Correct Answer: B) HCl. 18. White silver chloride in sunlight turns to: A) Grey. B) Yellow. C) Remain white. D) Red. Show Answer Correct Answer: A) Grey. 19. Which of the following observations indicates a chemical reaction has occurred? A) A solid dissolves in water. B) A liquid evaporates. C) A gas is produced with a change in temperature. D) A substance changes from solid to liquid. Show Answer Correct Answer: C) A gas is produced with a change in temperature. 20. In chemical reactions, what does the principle of conservation of mass mean? A) Matter is not created or destroyed. B) The total mass of the reactants is greater than the total mass of the products. C) The total mass of the reactants is less than the total mass of the products. D) Matter is not changed. Show Answer Correct Answer: A) Matter is not created or destroyed. 21. Quicklime and carbon dioxide gas are formed when: A) Limestone is heated. B) Carbon monoxide and copper sulphate are heated. C) Limestone and calcium chloride are mixed. D) Limestone is dissolved in water. Show Answer Correct Answer: A) Limestone is heated. 22. In a chemical reaction, ..... are changed into ..... A) Reactants; Products. B) Electrons; Molecules/Compounds. C) Coefficients; Subscripts. D) Original Elements; New Elements. Show Answer Correct Answer: A) Reactants; Products. 23. In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature? A) 2H2(l) + O2(l) $\rightarrow$ 2H2O(g). B) 2H2(g) + O2(l) $\rightarrow$ 2H2O(l). C) 2H2(g) + O2(g) $\rightarrow$ 2H2O(l). D) 2H2(g) + O2(g) $\rightarrow$ 2H2O(g). Show Answer Correct Answer: D) 2H2(g) + O2(g) $\rightarrow$ 2H2O(g). 24. Suppose the mass of two reactants totals 10 grams. After the chemical reaction, what should be the total mass of the products? A) 0 grams. B) 5 grams. C) 10 grams. D) 20 grams. Show Answer Correct Answer: C) 10 grams. 25. In the decomposition of lead (II) nitrate to give lead (II) oxide, nitrogen dioxide and oxygen gas, the coefficient of nitrogen dioxide (in the balanced equation) is A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. ← 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 7Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 8Class 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