This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What elements make up Copper sulphate? CuSO$_{4}$ A) Copper, sulphate. B) Copper, sulphur. C) Copper, sulphur and oxygen. D) Copper and oxygen. Show Answer Correct Answer: C) Copper, sulphur and oxygen. 2. What is the formula for neutralisation? A) Hci + nahp = naci + h2o. B) HCL + NAOH = NACL + H2O. C) Acig + Naoh = after + H2O. D) NapS + nahG = agH + CO2. Show Answer Correct Answer: B) HCL + NAOH = NACL + H2O. 3. Acid + alkali $\rightarrow$ A) Salt + hydrogen. B) Salt + water + carbon dioxide. C) Salt + water. D) Salt + carbon dioxide. Show Answer Correct Answer: C) Salt + water. 4. What is the colour of Lead (II) sulphate? A) Colourless. B) Brown. C) Blue. D) White. Show Answer Correct Answer: D) White. 5. Identify the gas released if a solution of sodium hydrogen carbonate is heated. A) H$_{2}$. B) CO$_{2}$. C) SO$_{2}$. D) HCO$_{3}$. Show Answer Correct Answer: B) CO$_{2}$. 6. State whether the following compound is soluble or insoluble. Aluminium sulfate Al$_{2}$(SO$_{4}$)$_{3}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 7. Acids dissolve in H2O gives- A) H + H2O$\rightarrow$ H3O. B) H+ ions. C) Both 1 and 2. D) None of the above. Show Answer Correct Answer: A) H + H2O$\rightarrow$ H3O. 8. Organic acids are weak acids. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Salts are ..... A) Solids. B) Mostly solids. C) Liquids. D) Gases. Show Answer Correct Answer: B) Mostly solids. 10. Sodium hydroxide and hydrochloric acid neutralises the effect of each other. Tick the products of neutralization reaction. A) Salt. B) Water. C) Heat. D) All of the above. Show Answer Correct Answer: D) All of the above. 11. Choose the correct answer for chemical equation on acid-base reaction A) Acid + Base gives Salt + Water. B) Acid + Base gives neutral solution. C) HCL + (NaOH) gives (NaCl) + H2O. D) None of them. Show Answer Correct Answer: C) HCL + (NaOH) gives (NaCl) + H2O. 12. If the given solution neither changes the colour of the red litmus nor blue litmus paper, it is ..... A) An Acid. B) A base. C) Neutral. D) Colourless. Show Answer Correct Answer: C) Neutral. 13. If 200 ml NH $ _ {4} $ OH 0.8 m is reacted with 200 ml of 0.8 m HCl solution, KB NH $ _ {4} $ OH = 10 $^{-5} $, the mixture pH after reacting is ..... A) 5-log2. B) 5-log3. C) 5-Log4. D) 5-LOG5. E) 5-Log6. Show Answer Correct Answer: A) 5-log2. 14. Compound potassium hydrogencarbonate is classified as: A) Hydroxide. B) Acidic salt. C) Amphotheric hydroxide. D) None of the above. Show Answer Correct Answer: B) Acidic salt. 15. Aluminum is more reactive than Magnesium. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. ..... converts lime water milky. A) O2. B) Ill. C) Co2. D) H2o. Show Answer Correct Answer: C) Co2. 17. Nitric acid turns A) Red litmus blue. B) Blue litmus red. C) All the above. D) None of the above. Show Answer Correct Answer: B) Blue litmus red. 18. Alkalinity is when you measure how strong a ..... solution is. A) Base. B) Acid. C) All the above. D) None of the above. Show Answer Correct Answer: A) Base. 19. Which of the following is Soapy to touch A) Hydrochloric acid. B) Nitric acid. C) Sodium Hydroxide. D) Sulphuric acid. Show Answer Correct Answer: C) Sodium Hydroxide. 20. Which acid is used in the steel industry to remove rust from iron? A) Acetic acids. B) Sulphuric acids. C) Hydrochloric acids. D) Nitric acids. Show Answer Correct Answer: C) Hydrochloric acids. 21. Litmus paper is A) Natural indicator. B) Synthetic indicator. C) Human-made indicator. D) None of these. Show Answer Correct Answer: A) Natural indicator. 22. We convert the acidic soil by adding ..... A) Quick lime. B) Slaked lime. C) Calcium oxide. D) All of these. Show Answer Correct Answer: D) All of these. 23. What are the products of neutralisation? A) Acid and a base. B) Water and salt. C) Salt and a base. D) Acid and water. Show Answer Correct Answer: B) Water and salt. 24. Is Turmeric a Natural Indicator? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. Name the Acid released by the bite of an Ant A) Oxallic acid. B) Mallic acid. C) Formic acid. D) Citric acid. Show Answer Correct Answer: C) Formic acid. ← 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 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 10Class 7 Science Chapter 4 Salts Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books