This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Magnesium sulphate / Magnesium sulfat A) Magnesium hydroxide + sodium sulphate magnesium hydroxide + sodium sulfate. B) Magnesium nitrate + ammonium sulphateMagnesium nitrat + ammonium sulfat. C) Magnesium + sulphuric acidMagnesium + asid sulfurik. D) None of the above. Show Answer Correct Answer: C) Magnesium + sulphuric acidMagnesium + asid sulfurik. 2. What two substances must combine to make a basic 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: C) Weak acid and strong base. 3. One benefit of Red Cabbage Juice Indicator is that it ..... A) Tells you the exact pH. B) Is very accurate. C) It is very expensive. D) It can be made from materials you have at home. Show Answer Correct Answer: D) It can be made from materials you have at home. 4. What two substances must combine to make a neutral 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: A) Strong acid and strong base. 5. When blue litmus is dipped into a solution of Sodium Chloride A) Blue litmus turns red. B) It stays blue. C) Red litmus turns blue. D) None of the above. Show Answer Correct Answer: B) It stays blue. 6. Assertion (A):Pure water is neither acidic nor basic.Reason (R):The pH of a solution is inversely proportional to the concentration of hydrogenions in it. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: B) Both A and R are true but R is not the correct explanation of A. 7. In an experiment, a student adds a salt to water and observes that it does not dissolve. Which of the following could be a reason for this observation? A) The salt is insoluble in water. B) The water is too cold. C) The salt is already saturated. D) The salt is soluble in water. Show Answer Correct Answer: A) The salt is insoluble in water. 8. How do we convert the factory waste? A) Salt. B) Acids. C) Base. D) Phenolphthalein. Show Answer Correct Answer: C) Base. 9. Which of the following is not a natural occuring indicator? A) Turmeric. B) China rose. C) Phenolphthalein. D) Litmus. Show Answer Correct Answer: C) Phenolphthalein. 10. An element X forms a hydroxide which dissolves both in acids and in alkalis. What could X be? A) Aluminium. B) Calcium. C) Copper. D) Iron. Show Answer Correct Answer: A) Aluminium. 11. SULPHURIC ACID CHEMICAL FORMULA IS A) HCl. B) NaOH. C) H2SO4. D) NaCL. Show Answer Correct Answer: C) H2SO4. 12. Sulphate (VI) iron (III) is ..... A) Fe$_{2}$(SO$_{4}$)$_{3}$. B) Fe$_{3}$(SO$_{4}$)$_{2}$. C) Disabled $ _ {4} $. D) Fe$_{2}$SO$_{4}$. Show Answer Correct Answer: A) Fe$_{2}$(SO$_{4}$)$_{3}$. 13. Salts that are made with sulfuric acid are called ..... A) Chlorides. B) Sulfates. C) Nitrates. D) Carbonates. Show Answer Correct Answer: B) Sulfates. 14. Methyl Orange changes color to ..... in Acidic Solution and ..... in Basic Solution. A) Red, Yellow. B) Red, Orange. C) Yellow, Orange. D) Orange, Red. Show Answer Correct Answer: A) Red, Yellow. 15. How can we prevent sodium from reacting? A) By keeping it under a layer of oil. B) By galvanising it. C) By keeping it cool. D) By heating it. Show Answer Correct Answer: A) By keeping it under a layer of oil. 16. Which is a way Salt can be formed? A) Acid + Alkali. B) Neutralization. C) Metal + Acid. D) All of the above. Show Answer Correct Answer: D) All of the above. 17. When making an insoluble salt, why do we wash the filter paper with distilled water? A) To remove insoluble impurities. B) To remove soluble impurities. C) To rinse more product through the filter paper. D) To make a more dilute solution. Show Answer Correct Answer: B) To remove soluble impurities. 18. Chemical name of Lime Water ..... A) Calcium Hydroxide. B) Calcium Carbonate. C) Calcium oxide. D) Calcium bisulphate. Show Answer Correct Answer: A) Calcium Hydroxide. 19. Acidic solutions turn china rose petal solution ..... A) Blue. B) Green. C) No effect. D) Dark pink. Show Answer Correct Answer: D) Dark pink. 20. What is the effect of temperature on the solubility of most solid salts in water? A) Solubility increases with temperature. B) Solubility decreases with temperature. C) Temperature has no effect on solubility. D) Solubility first increases then decreases. Show Answer Correct Answer: A) Solubility increases with temperature. 21. COOL DRINKS ARE MALEIC ACID. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 22. Name the Acidd present in Apple A) Citric acid. B) Mallic acid. C) Oxalic acid. D) Tartaric acid. Show Answer Correct Answer: B) Mallic acid. 23. Which of the following can be prepared by using neutralization between base and acid? Which of the following can be provided through neutralization between the base and acid? A) Sodium sulphate / natrium sulfat. B) Iron (II) chloride / Ferum (II) chlorder. C) Lead (II) Chromate / Plumbum (II) Chromate. D) Silver bromide / argentum bromide. Show Answer Correct Answer: B) Iron (II) chloride / Ferum (II) chlorder. 24. Acidic soil is treated with bases like A) Calcium Hydroxide. B) Magnesium Hydroxide. C) Milk of Magnesia. D) None of the above. Show Answer Correct Answer: A) Calcium Hydroxide. 25. A salt derived from strong acid and weak base will dissolve in water to give a solution which is- A) Acidic. B) Basic. C) Neutral. D) None of these. Show Answer Correct Answer: A) Acidic. ← 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