This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 1 Chemical Reactions And Equations – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A fuel is combined with oxygen to produce carbon dioxide and water A) Decomposition. B) Single Replacement. C) Double Replacement. D) Combustion. Show Answer Correct Answer: D) Combustion. 2. A solution of ..... is used in whitewashing A) CaO. B) Ca (oh) $ _ {2} $. C) All the above. D) None of the above. Show Answer Correct Answer: B) Ca (oh) $ _ {2} $. 3. Reaction in which energy is released is called A) Endothermic reaction. B) Exothermic reaction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic reaction. 4. In the following equation:Na$_{2}$CO$_{3}$ + xHCI $\rightarrow$ 2NaCI +CO$_{2}$ + H$_{2}$O, the value of x is A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 5. Zn + H$_{2}$SO$_{4}$ ..... > ZnSO$_{4}$ + H$_{2}$Above reaction is- A) Decomposition reaction. B) Single displacement reaction. C) Combination reaction. D) Synthesis reaction. Show Answer Correct Answer: B) Single displacement reaction. 6. SILVER BROMIDE IS USED IN A) BLACK AND WHITE PHOTOGRAPHY. B) RUSTING OF IRON. C) COLOUR PHOTOGRAPHY. D) DESTARCHING. Show Answer Correct Answer: A) BLACK AND WHITE PHOTOGRAPHY. 7. The changes which take place when fats and oils are oxidised: A) They become better in taste. B) They become rancid and give good smell. C) They become rancid and their smell and taste change. D) They remain unaffected. Show Answer Correct Answer: C) They become rancid and their smell and taste change. 8. What happens when silver chloride is put under sunlight? A) Silver metal and chlorine gas are formed. B) Silver metal and hydrogen gas are formed. C) Only silver metal is formed. D) Only hydrogen gas is formed. Show Answer Correct Answer: A) Silver metal and chlorine gas are formed. 9. What happens when lead nitrate reacts with potassium iodide? A) They will not react. B) Large amount of hydrogen release. C) Yellow ppt of lead iodide and potassium nitrate will be produced. D) Evolution of gas will occur. Show Answer Correct Answer: C) Yellow ppt of lead iodide and potassium nitrate will be produced. 10. When a more reactive metal displaces a less reactive metal from a compound it is called ..... A) Combination reaction. B) Decomposition reaction. C) Displacement reaction. D) Redox reaction. Show Answer Correct Answer: C) Displacement reaction. 11. Which of the following does not involve a chemical reaction? A) Digestion of food in our body. B) Process of respiration. C) Burning of candle wax when heated. D) Melting of candle wax on heating. Show Answer Correct Answer: D) Melting of candle wax on heating. 12. 1o. A reddish brown coloured metal used in electric wires, when powdered and heated strongly in an open China dish, its color turns black. When hydrogen gas is passed over this black substances, it regain its original color. Based on this information, the metal and black coloured substances are A) Copper and copper nitrate. B) Silver and silver oxide. C) Copper and copper oxide. D) Aluminium and aluminium oxide. Show Answer Correct Answer: C) Copper and copper oxide. 13. A white precipitate can be obtained by adding dilute sulphuric acid to A) CuSO4 solution. B) NaCl solution. C) BaCl2 solution. D) Na2SO4 solution. Show Answer Correct Answer: C) BaCl2 solution. 14. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to: A) Make the ribbon surface shinier. B) Remove the layer of magnesium oxide from the ribbon surface. C) Remove the layer of magnesium carbonate from the ribbon surface. D) Remove the moisture from the ribbon surface. Show Answer Correct Answer: C) Remove the layer of magnesium carbonate from the ribbon surface. 15. Which observation would most likely indicate that an exothermic reaction has occurred? A) A color change. B) The production of gas bubbles. C) An increase in temperature. D) A decrease in temperature. Show Answer Correct Answer: C) An increase in temperature. 16. Chromium oxide + Carbon $\rightarrow$ Chromium + Carbon monoxide A) Chromium and carbon. B) Chromium and carbon monoxide. C) Chromium and carbon dioxide. D) Chromium oxide and carbon. Show Answer Correct Answer: B) Chromium and carbon monoxide. 17. Magnesiumm ribbon burns with A) Dazzling white flame. B) Dazzling light green flame. C) Dazzling pink flame. D) None of the above. Show Answer Correct Answer: A) Dazzling white flame. 18. The reduced substance is called ..... A) Oxidizing agent. B) Reducing agent. C) Oxidized agent. D) Reduced agent. Show Answer Correct Answer: A) Oxidizing agent. 19. What colour change is observed when silver chloride is exposed to sunlight? A) Silver chloride turns white. B) Silver chloride turns brown. C) Silver chloride shows no colour change. D) Silver chloride changes to silver. Show Answer Correct Answer: D) Silver chloride changes to silver. 20. On immersing an iron nail in CuSO4 solution for few minutes, you will observe A) No reaction takes place. B) The colour of solution fades away. C) The surface of iron nails acquire a black coating. D) The colour of solution changes to green. Show Answer Correct Answer: D) The colour of solution changes to green. 21. When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from: A) Blue to green. B) Green to blue. C) Green to brown. D) Green to yellow. Show Answer Correct Answer: C) Green to brown. 22. How many Hydrogen (H) atoms are in NH$_{3}$O5 A) 3. B) 4. C) 5. D) 1. Show Answer Correct Answer: A) 3. 23. DECOMPOSITION REACTION IS OPPOSITE TO ..... REACTION. A) COMBINATION. B) NON DECOMPOSITION. C) DOUBLE DISPLACEMENT. D) PRECIPITATION. Show Answer Correct Answer: A) COMBINATION. 24. 4NO$_{2 }$is called A) Nitrogen dioxide which is brown fumes. B) Nitrogen oxide which are brown fumes. C) All the above. D) None of the above. Show Answer Correct Answer: A) Nitrogen dioxide which is brown fumes. 25. A ..... equation has equal number of atoms of diferrent element in reactant and product A) Balanced. B) Skeletal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Balanced. ← 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 8Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 9Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books