This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 1 Chemical Reactions And Equations – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The given reaction is an example of:3MnO$_{2}$ (s) + 4Al (s) ..... > 3Mn (l) + 2Al$_{2}$O$_{3}$ (s) + Heat A) Combination and exothermic reaction. B) Combination and endothermic reaction. C) Displacement and exothermic reaction. D) Displacement and endothermic reaction. Show Answer Correct Answer: C) Displacement and exothermic reaction. 2. The reaction in which two compounds exchange their ions to form two new compounds is- A) A displacement reaction. B) A decomposition reaction. C) An isomerization reaction. D) A double displacement reactions. Show Answer Correct Answer: B) A decomposition reaction. 3. Identify the substance oxidized in the reaction MnO2 + 4HCl $\rightarrow$ 2MnCl2 + 2H2O + Cl2. A) HCl. B) H2O. C) MnCl2. D) MnO2. Show Answer Correct Answer: D) MnO2. 4. The chemical formula of sodium carbonate ..... A) On $ _ {2} $ co $ _ {3} $. B) Naco $ _ {3} $. C) On $ _ {3} $ co $ _ {3} $. D) None of the above. Show Answer Correct Answer: A) On $ _ {2} $ co $ _ {3} $. 5. Oxidation is a process which involves A) Addition of oxygen. B) Addition of hydrogen. C) Removal of oxygen. D) NONE. Show Answer Correct Answer: A) Addition of oxygen. 6. A balanced chemical equation is in accordance with- A) Avogadro's law. B) Law of multiple proportion. C) Law of conservation of mass. D) Law of gaseous volumes. Show Answer Correct Answer: C) Law of conservation of mass. 7. Consider equation:Cu$^{+2 }$(aq) + 2OH$^{-}$(aq) ..... > CU(OH)$_{2 }$(s)what colour will Cu(OH)$_{2}$ will be in? A) White. B) Yellow. C) No colour. D) Blue. Show Answer Correct Answer: D) Blue. 8. TARNISHING REFERS TO A) CORROSION OF OTHER METALS LIKE SILVER. B) CORROSION OF IRON. C) RUSTING OF IRON. D) Rancidity. Show Answer Correct Answer: A) CORROSION OF OTHER METALS LIKE SILVER. 9. 2 nabr + 1 ca (oh) $ _ {2} $ ..... > 1 cabr $ _ {2} $ + 2 NaOH A) Synthesis (or combination). B) Decomposition. C) Single displacement. D) Double displacement. Show Answer Correct Answer: D) Double displacement. 10. When copper powder is heated it gets coated with- A) Black copper oxide. B) Yellow copper oxide. C) Red copper oxide. D) None of these. Show Answer Correct Answer: A) Black copper oxide. 11. Chemical formula of quick lime is: A) CaO. B) CA (OH) 2. C) Caco3. D) CO2. Show Answer Correct Answer: A) CaO. 12. The smallest particle of an element; made of electrons, protons, and neutrons A) Atoms. B) Elements. C) Molecules. D) Products. Show Answer Correct Answer: A) Atoms. 13. A redox reaction is one in which: A) Both the substance are reduced. B) Both the substance are oxidized. C) An acid is neutralized by the base. D) One substance is oxidized while the other is reduced. Show Answer Correct Answer: D) One substance is oxidized while the other is reduced. 14. Which of the following gases can be used for storage A) Carbon dioxide or Oxygen. B) Nitrogen or Oxygen. C) Carbon dioxide or Helium. D) Helium or Nitrogen. Show Answer Correct Answer: D) Helium or Nitrogen. 15. The neutralization reaction between an acid and a base is a type of: A) Double displacement reaction. B) Displacement reaction. C) Addition reaction. D) Decomposition reaction. Show Answer Correct Answer: A) Double displacement reaction. 16. A dilute solution of sodium carbonate was added to two test tubes-one containing dil HCl (a) and the other containing dilute NaOH(b). The correct observation was- A) A brown coloured gas liberated in test tube A. B) A brown coloured gas liberated in test tube B. C) A colourless gas liberated in test tube A. D) A colorless gas liberated in test tube B. Show Answer Correct Answer: C) A colourless gas liberated in test tube A. 17. How many Sodium (Na) are in 6NaCl? A) 1. B) 12. C) 6. D) None of the above. Show Answer Correct Answer: C) 6. 18. A molecule is ..... A) A glob of gelatinous goo. B) Smaller than an atom. C) Filled with raisons. D) More than one atom bonded together. Show Answer Correct Answer: D) More than one atom bonded together. 19. What happens when acid reacts with metals? A) Hydrogen gas is evovled. B) Carbon dioxide is evolved. C) No reaction. D) Hydrogen gas is evolved and salt of that acid is formed. Show Answer Correct Answer: D) Hydrogen gas is evolved and salt of that acid is formed. 20. The process of reduction involves: A) Removal of oxygen. B) Removal of hydrogen. C) Addition of hydrogen. D) Addition of oxygen. Show Answer Correct Answer: C) Addition of hydrogen. 21. On immersing iron nails in CuSO$_{4}$ solution for a few minutes, what wil you observe? A) The colour of solution changes to green. B) There is no change. C) The colour of solution changes to brown. D) Iron nails are coated with a white layer. Show Answer Correct Answer: A) The colour of solution changes to green. 22. An acid which can decolourise purple coloured potassium permanganate solution is A) Sulphuric acid. B) Hydrochloric acid. C) Citric acid. D) Carbonic acid. Show Answer Correct Answer: C) Citric acid. 23. The colour formed on the surface of copper powder when it is heated in a china dish: A) Red. B) Blue. C) Green. D) Black. Show Answer Correct Answer: D) Black. 24. Chemically rust is A) Hydrated ferrous oxide. B) Only ferric oxide. C) Hydrated ferric oxide. D) None of these. Show Answer Correct Answer: C) Hydrated ferric oxide. 25. In a chemical reaction between sulphuric acid and barium chloride solution, the white precipitate formed is ..... A) HCl. B) Chlorine. C) Sulphur. D) Barium sulphate. Show Answer Correct Answer: D) Barium sulphate. ← 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 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