This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Acid comes from a ..... word A) Latin. B) Greek. C) All the above. D) None of the above. Show Answer Correct Answer: A) Latin. 2. ..... refers to the ability of a substance to combine and form a solution A) Solvent. B) Solute. C) Solution. D) Solubility. Show Answer Correct Answer: D) Solubility. 3. Which of the following ions produce a white precipitate that is insoluble in excess ammonia solution? A) Ca$^{2+}$. B) Zn$^{2+}$. C) Mg$^{2+}$. D) None of the above. Show Answer Correct Answer: C) Mg$^{2+}$. 4. Which one of the following is correct property of turmeric indicator A) It turns blue in acidic and red in basic. B) It turns red in acidic and blue in basic. C) It remains colourless in acidic and red in basic. D) It changes to green in all cases (acidic, basic or neutral). Show Answer Correct Answer: B) It turns red in acidic and blue in basic. 5. The acid present in tea is ..... A) Glycolic acid. B) Tannic acid. C) All the above. D) None of the above. Show Answer Correct Answer: B) Tannic acid. 6. Neutral solutions have a pH of 0. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 7. What does Acid release, when it is present in thesolution form. A) OH$^{-}$. B) H$^{+}$. C) NO$^{-}$. D) Cl$^{-}$. Show Answer Correct Answer: B) H$^{+}$. 8. NH solution $ _ {4} $ CL 0.16 m has a PH value as big ..... (k $ _ {b} $ nh $ _ {4} $ oh = 10 $^{-8} $) A) 10 + log 4. B) 10-log 4. C) 4-log 16. D) 4-log 4. E) 4 + log 4. Show Answer Correct Answer: D) 4-log 4. 9. Compound potassium nitrate is classified as: A) Acidic salt. B) Amphotheric hydroxide. C) Neutral salt. D) None of the above. Show Answer Correct Answer: C) Neutral salt. 10. Which gas is evolved when acids react with metals? A) O2. B) CO2. C) H2. D) N2. Show Answer Correct Answer: C) H2. 11. What is the common name of sodium hydroxide? A) Baking soda. B) Calcium. C) Caustic soda. D) Chalk. Show Answer Correct Answer: C) Caustic soda. 12. What is the correct order for making a salt? A) Dissolve metal oxide in acid $\rightarrow$ evaporate $\rightarrow$ filter. B) Dissolve metal oxide in acid $\rightarrow$ filter $\rightarrow$ evaporate. C) Filter $\rightarrow$ dissolve metal oxide in acid $\rightarrow$ evaporate. D) Filter $\rightarrow$ evaporate $\rightarrow$ dissolve metal oxide in acid. Show Answer Correct Answer: B) Dissolve metal oxide in acid $\rightarrow$ filter $\rightarrow$ evaporate. 13. Farmers neutralise the effect of acidity of the soil by adding A) Slaked lime. B) Gypsum. C) Caustic Soda. D) Baking soda. Show Answer Correct Answer: A) Slaked lime. 14. Lime water turns red litmus blue. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 15. Neutralisation reaction between a strong acid and weak base forms: A) (a) an acidic salt. B) (b) a basic salt. C) (c) a neutral salt. D) Salt. Show Answer Correct Answer: D) Salt. 16. Evidence of Chemical Change. A) New Substance. B) Size change. C) State change. D) Mixture. Show Answer Correct Answer: A) New Substance. 17. THE ACID PRESENT IN CITRUS FRUITS IS? A) ASCORBIC ACID. B) NUCLEIC ACID. C) HYDROCHOLORIC ACID. D) NITRIC ACID. Show Answer Correct Answer: A) ASCORBIC ACID. 18. Acid present in gooseberries is A) Oxalic acid. B) Citric acid. C) Tartaric acid. D) Lactic acid. Show Answer Correct Answer: C) Tartaric acid. 19. Bases are ..... in taste and ..... to touch. A) Sour and soapy. B) Bitter and soapy. C) Bitter and gritty. D) Sour and gritty. Show Answer Correct Answer: B) Bitter and soapy. 20. What reactants are used to produce Sodium chloride? A) Sodium hydroxide and nitric acid. B) Sodium hydroxide and phosphoric acid. C) Sodium hydroxide and sulfuric acid. D) Sodium hydroxide and hydrochloric acid. Show Answer Correct Answer: D) Sodium hydroxide and hydrochloric acid. 21. How can factory wastes be neutralized? A) By adding more waste. B) By doing nothing. C) By adding acids. D) By adding basics. Show Answer Correct Answer: D) By adding basics. 22. A substance that changes colour when mixed with an acid or base is a(n) ..... A) Indicator. B) Neutralize. C) Corrosive. D) Electricity. Show Answer Correct Answer: A) Indicator. 23. The drink that many drink every morning:Coffeeis ..... A) Acidic. B) Nuetral. C) Basic. D) None of these. Show Answer Correct Answer: A) Acidic. 24. Solutions having a pH number 8 are A) Acidic. B) Basic. C) Highly acidic. D) None of the above. Show Answer Correct Answer: B) Basic. 25. Acid + metal carbonate gives? A) Salt + H2 + Co2. B) Salt + H20+ O2. C) Salt + H20 + Co2. D) Salt + Co3. Show Answer Correct Answer: C) Salt + H20 + Co2. ← 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