This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is Alkalis? A) Bases that are not soluble in water. B) They are composed of carbon and hydrogen atoms. C) Bases That dissolve in water. D) Derived from one or more mineral compounds. Show Answer Correct Answer: C) Bases That dissolve in water. 2. The gas which burns with a pop sound ( H2, CO2, CuSO4, CH4) A) H$_{2}$. B) CH$_{4}$. C) O$_{2}$. D) CO$_{2}$. Show Answer Correct Answer: A) H$_{2}$. 3. Metal + Acid yields ..... A) Salt + Hydrogen. B) Salt + Water + Carbon Dioxide. C) Salt + Water. D) Salt + Alkali. Show Answer Correct Answer: A) Salt + Hydrogen. 4. What is the purpose of a titration when making pure salts? A) To test if reactants react. B) To determine the exact quantities needed for neutralisation. C) To calculate the concentration of the salt. D) To test quality of reactants. Show Answer Correct Answer: B) To determine the exact quantities needed for neutralisation. 5. Give the name of an ion S$^{2-}$: A) Sulfide. B) Sulphonate. C) Sulfite. D) None of the above. Show Answer Correct Answer: A) Sulfide. 6. Special type of substances are used to test whether a substance is acidic or basic. These substances are known as ..... A) Litmus paper. B) China rose. C) Turmeric. D) Indicators. Show Answer Correct Answer: D) Indicators. 7. What are the properties of acids? A) Acids have a salty taste and turn red litmus paper yellow. B) Acids have a sour taste, turn blue litmus paper red, and react with metals to produce hydrogen gas. C) Acids have a bitter taste and turn blue litmus paper green. D) Acids have a sweet taste and turn red litmus paper blue. Show Answer Correct Answer: B) Acids have a sour taste, turn blue litmus paper red, and react with metals to produce hydrogen gas. 8. What is formed during neutralisation? A) Sodium hydroxide. B) Salt and nichrome. C) Salt. D) Water ( distilled ). Show Answer Correct Answer: C) Salt. 9. Strong Acids are A) Concentrated. B) Dilute. C) Powerful. D) Common. Show Answer Correct Answer: A) Concentrated. 10. How do bases feel and taste? A) Slippery and bitter. B) Gritty and salty. C) Rough and sweet. D) Smooth and sour. Show Answer Correct Answer: A) Slippery and bitter. 11. Toothpaste is a A) Base. B) Acid. C) Salt. D) None of these. Show Answer Correct Answer: A) Base. 12. While diluting acid, acid should be added to water dropwise with continues stirring. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Chemica formula of carbomic acid A) HNI3. B) Hakka. C) All the above. D) None of the above. Show Answer Correct Answer: B) Hakka. 14. Anshuman stained his handkerchief with turmeric. His handkerchief turned ..... when he rubbed soap on it. A) Yellow. B) Red. C) Green. D) Blue. Show Answer Correct Answer: B) Red. 15. What is the salt produced if you react Sodium carbonate and sulfuric acid? A) Sodium oxide. B) Sodium hydroxide. C) Sodium sulfate. D) Sodium phosphate. Show Answer Correct Answer: C) Sodium sulfate. 16. Which of the following is Natural Indicator for Acid & Base A) Methyl orange. B) Universal Indicator. C) China Rose. D) None of the above. Show Answer Correct Answer: C) China Rose. 17. China rose indicator turns basic solutions to ..... A) Dark pink. B) Green. C) Yellow. D) Red. Show Answer Correct Answer: B) Green. 18. Copper (II) Carbonate / Kuprum (II) karbonat A) Copper (II) oxide + Carbonic acbonic aidKuprum (II) oxid +. B) Copper (II) chloride + Carbonic acidKuprum (II) klorida + asid karbonik. C) Copper (II) chloride + Sodium carbonateKuprum (II) klorida + natrium karbonat. D) None of the above. Show Answer Correct Answer: C) Copper (II) chloride + Sodium carbonateKuprum (II) klorida + natrium karbonat. 19. Phenolphthalein is a synthetic indicator and its colours inacidic and basic solutions, respectively are A) Red and blue. B) Blue and yellow. C) Colorless and pink. D) Red and yellow. Show Answer Correct Answer: C) Colorless and pink. 20. What is the nature of lime juice? A) Neutral. B) Basic. C) Acidic. D) None of the above. Show Answer Correct Answer: C) Acidic. 21. What is the remedy for ant bite? (formic acid) A) Sodium hydrogen carbonate. B) Calcuim hydroxide. C) Turmeric. D) Soap solution. Show Answer Correct Answer: A) Sodium hydrogen carbonate. 22. Acid taste A) Bitter. B) Sour. C) All the above. D) None of the above. Show Answer Correct Answer: B) Sour. 23. Which of the following is spread on icy roads to melt ice in cold countries? A) Sodium bicarbonate. B) Rock salt. C) Sodium hydroxide. D) None of these. Show Answer Correct Answer: B) Rock salt. 24. What reactants are needed to prepare (make) lead sulfate? A) Lead and hydrochloric acid. B) Lead and sulfuric acid. C) Lead and nitric acid. D) Lead and carbonic acid. Show Answer Correct Answer: B) Lead and sulfuric acid. 25. Which of the following salts is generally considered soluble in water? A) $ \text {nacl} $. B) $\text{AgCl}$. C) $\text{PbSO}_4$. D) $ \text {Baso} _4 $. Show Answer Correct Answer: A) $ \text {nacl} $. ← 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