This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which type of ion does an acid produce when it is dissolved in water? A) Oxide. B) Oxygen. C) Hydronium. D) Hydroxide. Show Answer Correct Answer: C) Hydronium. 2. Which of these are Natural Indicators? A) Turmeric. B) Red Cabbage. C) Hibiscus. D) All of these. Show Answer Correct Answer: D) All of these. 3. Chemical formula:Ammonia gas A) Ac. B) NH3. C) SO4. D) Th4. Show Answer Correct Answer: B) NH3. 4. If an indicator gives changes colour with a acid it does not change colour with an acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 5. The formula for a sulphate ion is SO$_{4}$ $^{2-}$ and for a nitrate is NO$_{3}$ $^{-}$. If the formula of the sulphate salt of M is MSO$_{4}$, what is the formula of the nitrate salt A) Diversified. B) M$_{2}$NO$_{3}$. C) M(NO$_{3}$)$_{2}$. D) M(NO$_{3}$)$_{3}$. Show Answer Correct Answer: C) M(NO$_{3}$)$_{2}$. 6. Organic acid are also known as A) Weak acid. B) Man-made acid. C) All the above. D) None of the above. Show Answer Correct Answer: A) Weak acid. 7. Acids have ..... ions. A) H+. B) OH-. C) H-. D) OH+. Show Answer Correct Answer: A) H+. 8. State whether the following compound is soluble or insoluble. Potassium hydroxide KOH A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 9. Is coffee an acid, base or neutral A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Acid. 10. Common name of KOH A) Caustic soda. B) Caustic potash. C) Slaked lime. D) Quick lime. Show Answer Correct Answer: B) Caustic potash. 11. How do you convert the acidic soil? A) Organic waste. B) Organic matter. C) Waste food materials. D) Antacids. Show Answer Correct Answer: B) Organic matter. 12. ..... is used in manufacture of glass A) Calcium Hydroxide. B) Milk of Magnesia. C) Sodium carbonate. D) None of the above. Show Answer Correct Answer: C) Sodium carbonate. 13. The raw materials required for the manufacture of NaHCO3 by Solvay process are- A) CaCI2, (NH4)2 CO3, NH3. B) CaCI2, (NH4)2 CO3, NH3. C) NaCI2, (NH4)2CO3, NH3. D) NaCl, NH3CaCO3, H2O. Show Answer Correct Answer: D) NaCl, NH3CaCO3, H2O. 14. All bases are alkalis A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 15. Sodium carbonate solution is added into copper (II) nitrate solution in an experiment. What is the colour of the precipitate obtained? A) Green. B) Yellow. C) White. D) Brown. Show Answer Correct Answer: A) Green. 16. Complete the following word equation:Metalcarbonate + acid $\rightarrow$ A) Salt + Hydrogen. B) Salt + Water + Carbon Dioxide. C) Salt + Water. D) None of the above. Show Answer Correct Answer: B) Salt + Water + Carbon Dioxide. 17. Chlorides, sulfur, bromides, firs and fluoride are salts ..... A) Anaerobic acids. B) Oxygenic acids. C) Oxygen rules. D) Anaerobic principles. Show Answer Correct Answer: A) Anaerobic acids. 18. Which one of the following is a natural indicator? A) Methyl Orange. B) Phenolphthalein. C) Citric Acid. D) China rose indicator. Show Answer Correct Answer: D) China rose indicator. 19. The word acid comes from the ..... word ..... which means ..... A) Greek word acid which means salty. B) Latin word acere which means sour. C) Persian word acide which means bitter. D) French word acer which means sweet. Show Answer Correct Answer: B) Latin word acere which means sour. 20. What is the oxidation number of a Nitrogen in the compound NaNO3? A) +4. B) -3. C) +5. D) None of the above. Show Answer Correct Answer: C) +5. 21. An antacid tablet is given to a person when he suffers from:- A) Obesity. B) Acidity. C) Dog bite. D) None of these. Show Answer Correct Answer: B) Acidity. 22. Which among of these is a natural indicator A) Mango leaf. B) China rose. C) Mint. D) All of them. Show Answer Correct Answer: B) China rose. 23. Copper (II) sulphate / Kuprum (II) sulfat A) Copper + sulphuric acidKuprum + asid sulfurik. B) Copper (II) oxide + sulphuric acidKuprum (II) oksida + asid sulfurik. C) Copper (II) nitrate + sulphuric acidKuprum (II) nitrat + asid sulfurik. D) None of the above. Show Answer Correct Answer: B) Copper (II) oxide + sulphuric acidKuprum (II) oksida + asid sulfurik. 24. You can neutralize acid by adding a base that is just as strong? A) Ture. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) Ture. 25. What is to be given to get rid of Bee sting? A) Baking soda. B) Sodium hydrogen carbonated. C) Zinc oxide. D) Both a and b. Show Answer Correct Answer: B) Sodium hydrogen carbonated. ← 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