This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 28 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following will turn red, when a few drops of methyl orange is added? A) Baking soda. B) Hydrochloric acid. C) Sodium hydroxide. D) Washing soda. Show Answer Correct Answer: B) Hydrochloric acid. 2. When ant or bee sting it releases A) Base. B) Formic acid. C) Salt. D) None of these. Show Answer Correct Answer: B) Formic acid. 3. What ions arise during the dissociation of ca (no $ _ {3} $) $ _ {2} $? A) Ca $^{+} $ no $ _ {3} $$^{2-} $. B) Ca$^{2+ }$2NO$_{3}$$^{-}$. C) 2ca $^{2+} $ no $ _ {3} $$^{-} $. D) Ca$^{ }$2NO$_{3}$. Show Answer Correct Answer: B) Ca$^{2+ }$2NO$_{3}$$^{-}$. 4. The solubility will ..... for Ag$_{2}$CrO$_{4}$ if the pH decreases. A) Increase. B) Decrease. C) Remain the same. D) None of the above. Show Answer Correct Answer: A) Increase. 5. What is the nature of HNO$_{2 }$ A) A base. B) A salt. C) An acid. D) An ionic compound. Show Answer Correct Answer: C) An acid. 6. Ant bites you ..... You are feeling pain ..... What should be used in order to cure pain? A) Formic Solution. B) Callamine Solution. C) HCL Solution. D) Calamine Solution. Show Answer Correct Answer: D) Calamine Solution. 7. Give an example of a neutralization reaction. A) Vinegar + Baking soda $\rightarrow$ Carbon dioxide + Water. B) Hydrochloric acid + Sodium hydroxide $\rightarrow$ Sodium chloride + Water. C) Sulfuric acid + Potassium hydroxide $\rightarrow$ Potassium sulfate + Water. D) Nitric acid + Calcium hydroxide $\rightarrow$ Calcium nitrate + Water. Show Answer Correct Answer: B) Hydrochloric acid + Sodium hydroxide $\rightarrow$ Sodium chloride + Water. 8. Which colour does Ph strip turn when it is in contact with very strong base A) Green ( Ph7). B) Red ( ph2 ). C) Dark purple ( ph14). D) None of the above. Show Answer Correct Answer: C) Dark purple ( ph14). 9. Which method is used to prepare lead (II) chloride? A) Pb(NO$_{3}$)$_{2}$(aq) + NaCl (aq) $\rightarrow$. B) PbSO$_{4}$(s)+ NaCl (aq) $\rightarrow$. C) PbCO$_{3}$(s) + NaCl (aq) $\rightarrow$. D) None of the above. Show Answer Correct Answer: A) Pb(NO$_{3}$)$_{2}$(aq) + NaCl (aq) $\rightarrow$. 10. A solution turns green in a china rose indicator. What can we say about the solution? A) The solution is neutral in nature.(A). B) The solution is acidic nature.(B). C) The solution is basic in nature.(C). D) (A) AND (B). Show Answer Correct Answer: C) The solution is basic in nature.(C). 11. Which of the following method is used to prepare magnesium carbonate? A) Titration. B) Precipitation. C) Acid reacting with excess insoluble solid. D) Alkali reacting with ammonium salt. Show Answer Correct Answer: B) Precipitation. 12. Bryan wants to prepare potassium sulfate by reacting an acid with potassium hydroxide. Name the acid used in this experiment. A) Hydrochloric acid. B) Nitric acid. C) Sulfuric acid. D) None of the above. Show Answer Correct Answer: C) Sulfuric acid. 13. Give an example of an indicator. A) Ruler. B) Litmus paper. C) Pencil. D) Calculator. Show Answer Correct Answer: B) Litmus paper. 14. Jika diketahui pH (NH$_{4}$)$_{2}$SO$_{4}$ = 5, Kb NH$_{4}$OH = 10$^{-5}$, dan Mr (NH$_{4}$)$_{2}$SO$_{4}$= 132, massa amonium sulfat yang harus dilarutkan dalam 250 mL air adalah ..... A) 0, 825. B) 1, 650. C) 2, 475. D) 3, 300. E) 4, 125. Show Answer Correct Answer: B) 1, 650. 15. Bryan wants to prepare potassium sulphate by reacting an acid with potassium hydroxide. Name the acid used in this experiment. A) Hydrochloric acid. B) Nitric acid. C) Sulphuric acid. D) None of the above. Show Answer Correct Answer: C) Sulphuric acid. 16. Which of the following reagents can be used to make a sample of lead sulphate? A) Lead chloride. B) Lead carbonate. C) Lead nitrate. D) None of the above. Show Answer Correct Answer: C) Lead nitrate. 17. What two substances must combine to make a acidic salt A) Strong acid and strong base. B) Strong acid and weak base. C) Weak acid and strong base. D) Weak acid and weak base. Show Answer Correct Answer: B) Strong acid and weak base. 18. What salt will be created if there are ions fe $^{2+} $ and $ {4} $$^{3-} $ A) FeP $ _ {4} $. B) Fe$_{3}$PO4. C) Fe$_{3}$(PO$_{4}$)$_{2}$. D) Fe(PO$_{4}$)$_{2}$. Show Answer Correct Answer: C) Fe$_{3}$(PO$_{4}$)$_{2}$. 19. Common salt formula is A) NaOh. B) NaCl. C) H2So4. D) Nahda. Show Answer Correct Answer: B) NaCl. 20. Potassium hydroxide is ..... base A) Strong. B) Weak. C) Both. D) None of the above. Show Answer Correct Answer: A) Strong. 21. Ammonium nitrate manufacturing of fertilizers and explosives A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. Lemon contains Ascorbic Acid A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Which of the following is insoluble? A) Silver chloride. B) Zinc chloride. C) Potassium chloride. D) Ammonium chloride. Show Answer Correct Answer: A) Silver chloride. 24. State whether the following compound is soluble or insoluble. Zinc hydroxide Zn(OH)$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 25. A red litmus paper is dipped in a solution. The colour of the litmus becomes blue. what is the nature of the solution A) Basic. B) Neutral. C) None of these. D) Acidic. Show Answer Correct Answer: A) Basic. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Salts Quiz 1Class 7 Science Chapter 4 Salts Quiz 2Class 7 Science Chapter 4 Salts Quiz 3Class 7 Science Chapter 4 Salts Quiz 4Class 7 Science Chapter 4 Salts Quiz 5Class 7 Science Chapter 4 Salts Quiz 6Class 7 Science Chapter 4 Salts Quiz 7Class 7 Science Chapter 4 Salts Quiz 8Class 7 Science Chapter 4 Salts Quiz 9Class 7 Science Chapter 4 Salts Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books