This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 1 Chemical Reactions And Equations – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is termed as rancidity? A) Reduction of oxygen present in food. B) Oxidation of sugar present in food. C) Oxidation of oil present in food. D) All of the above. Show Answer Correct Answer: C) Oxidation of oil present in food. 2. If Mg is gently heated, what happens? A) MgO is formed. B) Nothing. C) Mg turns white in colour. D) Mg evaporates leaving nothing behind. Show Answer Correct Answer: A) MgO is formed. 3. What happens when copper rod is dipped in ironsulphate solution? A) Copper displaces iron. B) Blue colour of copper sulphate solution is obtained. C) No reaction takes place. D) Reaction is exothermic. Show Answer Correct Answer: C) No reaction takes place. 4. The respiration process in which glucose reacts with oxygen to produce energy is A) Exothermic reaction. B) Endothermic reaction. C) Reversible reaction. D) Combination reaction. Show Answer Correct Answer: A) Exothermic reaction. 5. Which of the following is not a type of reduction A) Gain of hydrogen. B) Loss of electron. C) Loss of oxygen. D) Gain of electron. Show Answer Correct Answer: B) Loss of electron. 6. Which of the following gases can be used for storage of fresh sample of an oil for a long time? A) Carbon dioxide or oxygen. B) Nitrogen or oxygen. C) Carbon dioxide or helium. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 7. Which of the following statements about the given reaction are correct?3Fe (s) + 4H2O (g) $\rightarrow$ Fe3O4 (s) + 4 H2 (g)(i) Iron metal is getting oxidised(ii) Water is getting reduced(iii) Water is acting as reducing agent(iv) Water is acting as oxidising agent A) (i), (ii) and (iii). B) (ii) and (iv). C) (i), (ii) and (iv). D) (ii) and (iv). Show Answer Correct Answer: C) (i), (ii) and (iv). 8. Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to A) (i) only. B) (i) and (iii). C) (ii) and (iii). D) (iv) only. Show Answer Correct Answer: B) (i) and (iii). 9. The reaction in which two compound exchange their ions to form two new compounds is called A) Displacement reaction. B) Combination reaction. C) Double displacement reaction. D) Redox reaction. Show Answer Correct Answer: C) Double displacement reaction. 10. Rancidity is a process in which fat/oils smell due to the change process of A) Oxidation. B) Reduction. C) Displacement. D) Neutralization. Show Answer Correct Answer: A) Oxidation. 11. In which of these compounds are there twice as many oxygen atoms as hydrogen atoms? A) H$_{3}$PO$_{4}$. B) H$_{2}$SO$_{4}$. C) HCIO$_{3}$. D) H$_{2}$O. Show Answer Correct Answer: B) H$_{2}$SO$_{4}$. 12. Two or more reactants combine to form one product A) Synthesis. B) Single Replacement. C) Double Replacement. D) Combustion. Show Answer Correct Answer: A) Synthesis. 13. When dil. sulphuric acid is added to pieces of iron sulphie, hydrogen sulphide gas is produced and soluble ferrous sulphate is produced. The type of chemical reaction involved is: A) Decomposition reaction. B) Combination reaction. C) Displacement Reaction. D) Double displacement reaction. Show Answer Correct Answer: D) Double displacement reaction. 14. When Ca (NO$_{3}$)$_{2}$ is heated, it gives CaO, NO$_{2}$ (g) and O$_{2}$(g). The correct number of moles of Ca (NO$_{3}$)$_{2}$, CaO, NO$_{2}$ (g) and O$_{2}$(g) are present in the reaction are respectively A) 2, 1, 3, 2. B) 2, 2, 4, 1. C) 2, 2, 2, 1. D) 1, 2, 4, 1. Show Answer Correct Answer: B) 2, 2, 4, 1. 15. All the methods mentioned below can be used to prevent the food from getting rancid except:i. Storing the food in the air-tight containers ii. Storing the food in refrigerator iii. Keeping the food in clean and covered containers iv. Always touching the food with clean hands A) (i) and (ii). B) (i) and (iii). C) (i), (iii) and (iv). D) (iii) and (iv). Show Answer Correct Answer: D) (iii) and (iv). 16. Reaction in which two or more substances react together to form a single compound A) Combination reaction. B) Decomposition reaction. C) Displacement reaction. D) None of the above. Show Answer Correct Answer: A) Combination reaction. 17. What coefficient is needed to balance the following chemical equation? N$_{2}$ + ..... H$_{2}$ ..... > 2 NH$_{3}$ A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 18. Lead Nitrate on heating forms lead oxide solid and nitrogen dioxide gas. What is the colour of lead oxide and nitrogen dioxide? A) White, Colourless. B) White, Brown. C) Yellow, Brown. D) Yellow, Colourless. Show Answer Correct Answer: C) Yellow, Brown. 19. Which of the following is not an endothermic reaction? A) CaCO3 $\rightarrow$ CAO + CO2. B) 2H2O$\rightarrow$2H2 + O2. C) 6CO2 + 6H2O$\rightarrow$ C6H12O6 + 6O2. D) C6H12O6 + 6O2-$\rightarrow$ 6CO2 + 6H2O. Show Answer Correct Answer: D) C6H12O6 + 6O2-$\rightarrow$ 6CO2 + 6H2O. 20. What happens when copper rod is dipped in iron sulphate solution? A) Copper displaces iron. B) Blue color of copper sulphate solution is obtained. C) No reaction takes place. D) (a) Reaction is exothermic. Show Answer Correct Answer: C) No reaction takes place. 21. Which of the following is an endothermic process? A) Dilution of sulphuric acid. B) Sublimation of dry ice. C) Condensation of water vapours. D) Respiration in human beings. Show Answer Correct Answer: B) Sublimation of dry ice. 22. Which type of reaction pulls in thermal energy from the environment around it? A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endothermic. 23. What type of chemical reactions take place when electricity is passed through water? A) Decomposition. B) Double displacement. C) Displacement. D) Combination. Show Answer Correct Answer: A) Decomposition. 24. True or False:Oxidation is the loss of electrons from a substance. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. Ou are given the following chemical equationMg (s) + CuO(s) ..... MgO(s) + Cu(s)This equation represents A) Decomposition reaction as well as displacement reaction. B) Combination reaction as well as double displacement reaction. C) Redox reaction as well as displacement reaction. D) Double displacement reaction as well as redox reaction. Show Answer Correct Answer: C) Redox reaction as well as displacement reaction. ← PreviousNext →Related QuizzesClass 10 Science Chapter 1 Chemical Reactions And Equations Quiz 1Class 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 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