This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Chemical Reactions And Equations > Class 10 Science Chapter 1 Chemical Reactions And Equations – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 7 (12 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. One of the following is an exothermic reaction. This is A) Process of respiration. B) Conversion of limestone into quicklime. C) Process of photosynthesis. D) Electrolysis of water. Show Answer Correct Answer: A) Process of respiration. 2. Hydrated ferrous sulphate is commonly known as ..... A) Green vitrioll. B) Yellow vitrio. C) Blue vitriol. D) Brown vitriol. Show Answer Correct Answer: A) Green vitrioll. 3. New substances formed in a chemical reaction is known as A) Reactants. B) Products. C) All the above. D) None of the above. Show Answer Correct Answer: B) Products. 4. Which is the oxidising agent in the following reaction?CuO (s) + H$_{2}$ (g) ..... > Cu (s) + H$_{2}$O (l) A) H$_{2}$. B) CuO. C) Cu. D) H$_{2}$O. Show Answer Correct Answer: B) CuO. 5. White precipitate will be formed if we add dilute sulphuric acid to: A) CuSO$_{4 }$Solution. B) NaCl Solution. C) BaCl$_{2 }$Solution. D) Empay 2. 2. E) None of these. Show Answer Correct Answer: C) BaCl$_{2 }$Solution. 6. Consider reaction:S(s) + O$_{2}$ (g) ..... > SO$_{2}$State of SO$_{2}$ in this reaction is A) Gas. B) Solid. C) Aqueous. D) Liquid. Show Answer Correct Answer: A) Gas. 7. What colour is copper sulphate A) Blue. B) Green. C) Brown. D) None of the above. Show Answer Correct Answer: A) Blue. 8. How many molecules of Carbon are in the following formula? 3C$_{2}$H$_{6}$ A) 3. B) 18. C) 6. D) 12. Show Answer Correct Answer: A) 3. 9. During a chemical reaction, atom s ..... A) Can appear. B) Can disappear. C) Get rearranged. D) Stop moving and vibrating. Show Answer Correct Answer: C) Get rearranged. 10. When starting material X is treated with water, it produces Y solution, which is used in white washing is Y, identify the X & Y from the following A) X is quick lime, Y is slaked lime. B) X is quick lime, Y is washing soda. C) X is quick lime, Y is slow lime. D) X is slaked lime, Y is washing soda. Show Answer Correct Answer: A) X is quick lime, Y is slaked lime. 11. Silver article turns black when kept in open for a few days due to formation of A) H2s. B) Ag2S. C) AgS. D) AGSO4. Show Answer Correct Answer: B) Ag2S. 12. Name the substance which is used in black and white photography? A) Silver Bromide. B) Silver Chloride. C) Silver Sulphide. D) Silver NItrate. Show Answer Correct Answer: A) Silver Bromide. ← PreviousRelated QuizzesScience QuizzesClass 10 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 6 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books