This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. One benefit of a pH Meter is that it A) Is very expensive. B) Only tells you if a substance is an acid or a base. C) Is very accurate. D) Can be made from substances you have at home. Show Answer Correct Answer: C) Is very accurate. 2. What does Gudhal mean? A) Acid. B) Turmeric in russian. C) China rose petals. D) Salt in a dissolved form. Show Answer Correct Answer: C) China rose petals. 3. If I dissolve salt in water, what is the solvent? A) Salt. B) Water. C) Salt & water. D) None of the above. Show Answer Correct Answer: B) Water. 4. Copper(II) Sulphate, CuSO$_{4}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble Salt. 5. What does apples contain? A) Tartaric. B) Acidic. C) Lactic. D) Oxalic. Show Answer Correct Answer: C) Lactic. 6. The Substance which turns Blue litmus red is ..... A) Basic. B) Acidic. C) Neutral. D) All of these. Show Answer Correct Answer: B) Acidic. 7. Barium sulphate, BaSO$_{4}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble Salt. 8. The sting of ants and bees contain ..... A) Washing soda. B) Oxalic acid. C) Tannic acid. D) Formic acid. E) Acetic acid. Show Answer Correct Answer: D) Formic acid. 9. What reactants are needed to prepare (make) magnesium nitrate? A) Magnesium and hydrochloric acid. B) Magnesium and sulfuric acid. C) Magnesium and nitric acid. D) Magnesium and carbonic acid. Show Answer Correct Answer: C) Magnesium and nitric acid. 10. Why is sodium hydroxide also termed as an alkali? A) Because it is a BASE. B) Because it is only an ALKALI. C) Because it is SOLUBLE IN WATER. D) Because it is a STRONG BASE. Show Answer Correct Answer: C) Because it is SOLUBLE IN WATER. 11. Which of the following salt is insoluble in water? A) Copper(II) sulfate. B) Silver Chloride. C) Potassium carbonate. D) Lead(II) nitrate. Show Answer Correct Answer: B) Silver Chloride. 12. Acidus is a ..... word. A) French. B) Greek. C) Latin. D) Arabic. Show Answer Correct Answer: C) Latin. 13. HCl + NaOH forms A) Sodium Acetate. B) Sodium Chloride. C) All the above. D) None of the above. Show Answer Correct Answer: B) Sodium Chloride. 14. Formula of hydrochloric acid A) HCL. B) H2SO4. C) All the above. D) None of the above. Show Answer Correct Answer: A) HCL. 15. Salts that are made with nitric acid are called ..... A) Chlorides. B) Sulfates. C) Nitrates. D) Carbonates. Show Answer Correct Answer: C) Nitrates. 16. Which acid is known as 'King of chemicals'? A) Hydrochloric. B) Nitric. C) Acetic. D) Sulphuric. Show Answer Correct Answer: D) Sulphuric. 17. ARE ALKALIS SOLUBLE IN WATER. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 18. The following substances form the acid rain ..... A) Carbon dioxide, sulphur dioxide, nitrogen dioxide. B) Sulphur hydroxide, Carbon monoxide, Nitrogen dioxide. C) Both a and b. D) Carbonic acidSulphur acidNitrogen acid. Show Answer Correct Answer: A) Carbon dioxide, sulphur dioxide, nitrogen dioxide. 19. Acids turn ..... litmus ..... A) Red; blue. B) Blue ; red. C) All the above. D) None of the above. Show Answer Correct Answer: B) Blue ; red. 20. Case Study:There is farming field near your house. The farmer of that field is complaining that the plants and crops are not growing properly ..... Farmer is telling that the soil is acidic ..... What he should add to the soil to make it suitable for farming? A) Quick Lime. B) Nitric Acid. C) Hydrochloric Acid. D) Citric Acid. Show Answer Correct Answer: A) Quick Lime. 21. If you have a garden soil that is very acidic with a pH of 3.5, what can you do to raise the pH? A) Add more acid. B) Add more water. C) Increase the temperature. D) Add a base. Show Answer Correct Answer: D) Add a base. 22. The solution which do not change the colour of either red or blue litmus are known as Neutral Solutions. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Acid turn A) Red to blue. B) Blue to red. C) Both. D) None. Show Answer Correct Answer: B) Blue to red. 24. When a soluble salt is formed from an acid and an insoluble base, how do you know when an excess of a base has been added? A) When bubbles of gas appear. B) When the reactant all dissolves. C) When some of the solid reactant is left unreacted/undissolved. D) When a colour change happens. Show Answer Correct Answer: C) When some of the solid reactant is left unreacted/undissolved. 25. Platinum is more reactive than copper A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← 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