This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a ..... reaction, an acid and an alkali produce a salt and a water. A) Concentrated. B) Neutralization. C) Decomposition. D) Dilute. Show Answer Correct Answer: B) Neutralization. 2. What is the chemical formulae for Sulfuric acid? A) H$_{2}$SO$_{4}$. B) HNO$_{3}$. C) HCl. D) None of the above. Show Answer Correct Answer: A) H$_{2}$SO$_{4}$. 3. State whether the following compound is soluble or insoluble. Magnesium nitrate, Mg(NO$_{3}$)$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 4. Which of the following can be prepared with neutralization by using metal and acid? Which of the following salts can be provided through neutralization between metal and acid? A) Sodium Iodide / sodium Iodida. B) Silver nitrate / Argentum nitrat. C) Magnesium sulphate / Magnesium sulfat. D) Copper (II) sulphate / Kuprum (II) sulfat. Show Answer Correct Answer: C) Magnesium sulphate / Magnesium sulfat. 5. Which solution can turn phenolphthalein pink? A) Sodium hydroxide. B) Hydrochloric acid. C) Vinegar. D) Tomato. Show Answer Correct Answer: A) Sodium hydroxide. 6. ..... contain a mild base which neutralize the excess acid present in the stomach. A) Antacids. B) Indicators. C) Filters. D) Bases. Show Answer Correct Answer: A) Antacids. 7. Plaster of Paries hardens by- A) Giving off CO2. B) Combining with water. C) Changing into CaCO3. D) Giving out water. Show Answer Correct Answer: B) Combining with water. 8. Iron + Hydrochloric acid $\rightarrow$? A) Iron + hydrogen. B) Iron chloride + hydrogen. C) Iron chloride + water. D) Iron sulfate + water. Show Answer Correct Answer: B) Iron chloride + hydrogen. 9. Nancy wrote a secret message using soda water. Try to decode using a suitable indicator. A) Phenolphthalein. B) Turmeric. C) China rose. D) None of the above. Show Answer Correct Answer: C) China rose. 10. Both acids and bases change colour of all indicators. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. State whether the following compound is soluble or insoluble. Ammonium carbonate (NH$_{4}$)$_{2}$CO$_{3 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 12. Blue litmus paper turns ..... on adding acid. A) Purple. B) Green. C) Remains the same. D) Red. Show Answer Correct Answer: D) Red. 13. Curd, lemon juice, orange juice and vinegar taste sour because they contain ..... A) Bases. B) Neutral. C) Salts. D) Acids. Show Answer Correct Answer: D) Acids. 14. State whether the following compound is soluble or insoluble. Calcium hydroxide (limewater), Ca(OH)$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 15. The salt solution below will change the color of the red litmus paper ..... A) NH4Cl. B) Nabr. C) To. D) CaCl2. E) CH3CONA. Show Answer Correct Answer: E) CH3CONA. 16. Name of acid present in CURD A) Tartaric acid. B) Formic acid. C) Citric acid. D) Lactic acid. Show Answer Correct Answer: D) Lactic acid. 17. Which one among the following is an Universal Indicator? A) Phenolphthalien. B) Litmus. C) Vanilla Extract. D) PH. Show Answer Correct Answer: D) PH. 18. Which of the following statements is true about all bases? A) React with acids. B) Have alkaline properties. C) Dissolve in water. D) Contain hydroxide ions. Show Answer Correct Answer: A) React with acids. 19. Which metal is the least reactive out of:copper, magnesium, zinc and iron? A) Copper. B) Magnesium. C) Iron. D) Zinc. Show Answer Correct Answer: A) Copper. 20. Taste of acid is A) Sour. B) Soupy. C) Sweet. D) Bitter. Show Answer Correct Answer: A) Sour. 21. State whether the following compound is soluble or insoluble. Calcium carbonate CaCO$_{3 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 22. What should you do to make Copper Sulphate crystals lose their blue colour? A) Powder it. B) Dissolve it. C) Heat it. D) Add acid to it. Show Answer Correct Answer: C) Heat it. 23. One benefit of a pH Meter is that it A) Only tells you if a substance is an acid or a base. B) Can be made from substances you have at home. C) Is very accurate. D) Is very expensive. Show Answer Correct Answer: C) Is very accurate. 24. What does Gudhal mean? A) Turmeric in russian. B) China rose petals. C) Salt in a dissolved form. D) Acid. Show Answer Correct Answer: B) China rose petals. 25. 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. 26. 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. 27. What does apples contain? A) Acidic. B) Lactic. C) Tartaric. D) Oxalic. Show Answer Correct Answer: B) Lactic. 28. The Substance which turns Blue litmus red is ..... A) Basic. B) Acidic. C) Neutral. D) All of these. Show Answer Correct Answer: B) Acidic. 29. 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. 30. The sting of ants and bees contain ..... A) Oxalic acid. B) Formic acid. C) Tannic acid. D) Acetic acid. E) Washing soda. Show Answer Correct Answer: B) Formic acid. 31. 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. 32. Why is sodium hydroxide also termed as an alkali? A) Because it is a STRONG BASE. B) Because it is only an ALKALI. C) Because it is SOLUBLE IN WATER. D) Because it is a BASE. Show Answer Correct Answer: C) Because it is SOLUBLE IN WATER. 33. Which of the following salt is insoluble in water? A) Copper(II) sulfate. B) Silver Chloride. C) Lead(II) nitrate. D) Potassium carbonate. Show Answer Correct Answer: B) Silver Chloride. 34. Acidus is a ..... word. A) Greek. B) Latin. C) French. D) Arabic. Show Answer Correct Answer: B) Latin. 35. 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. 36. Formula of hydrochloric acid A) HCL. B) H2SO4. C) All the above. D) None of the above. Show Answer Correct Answer: A) HCL. 37. Salts that are made with nitric acid are called ..... A) Carbonates. B) Chlorides. C) Sulfates. D) Nitrates. Show Answer Correct Answer: D) Nitrates. 38. ARE ALKALIS SOLUBLE IN WATER. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 39. 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. 40. 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. 41. 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) Hydrochloric Acid. B) Citric Acid. C) Nitric Acid. D) Quick Lime. Show Answer Correct Answer: D) Quick Lime. 42. 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 a base. B) Increase the temperature. C) Add more acid. D) Add more water. Show Answer Correct Answer: A) Add a base. 43. 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. 44. 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. 45. 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. 46. Salt is formed when ..... ion is displaced from the acid A) Cation. B) Anion. C) All the above. D) None of the above. Show Answer Correct Answer: A) Cation. 47. State whether the following compound is soluble or insoluble. Silver chloride, AgCl A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 48. Baking Soda is scientifically called as A) Sodium Hydroxide. B) Sodium Carbonate. C) Sodium HydrogenCarbonate. D) Sodium Oxide. Show Answer Correct Answer: C) Sodium HydrogenCarbonate. 49. WHAT IS THE COMMON NAME FOR SODIUM HYDROXIDE? A) CAUSTIC SODA. B) SLAKED LIME. C) QUICK LIME. D) BAKING SODA. Show Answer Correct Answer: A) CAUSTIC SODA. 50. What is the chemical formulae for Hydrochloric acid? A) H$_{2}$SO$_{4}$. B) HNO$_{3}$. C) HCl. D) None of the above. Show Answer Correct Answer: C) HCl. 51. If the KX salt solution 0.01 m has a pH = 9, the price of the HX acid is as big ..... A) 10$^{-4}$. B) 10$^{-5}$. C) 10$^{-6}$. D) 10$^{-8}$. E) 10$^{-7}$. Show Answer Correct Answer: C) 10$^{-6}$. 52. Compound aluminium hydroxide is classified as: A) Amphotherichydroxide. B) Basic salthydroxide. C) Middle salt. D) None of the above. Show Answer Correct Answer: A) Amphotherichydroxide. 53. Which type of salt the following salt are classiffied as?"LiCH$_{3}$COO" A) Neutral salt. B) Acidic salt. C) Basic salt. D) None of the above. Show Answer Correct Answer: C) Basic salt. 54. Name the plant from which litmus paper is extracted A) Pitcher plant. B) Lichens. C) Fungi. D) Jute. Show Answer Correct Answer: B) Lichens. 55. Which equation correctly shows the displacement of zinc by iron? A) Copper sulfate + zinc $\rightarrow$ zinc sulfate + copper. B) Copper + zinc sulphate $\rightarrow$ copper sulfate + zinc. C) Iron cannot displace zinc. D) Zinc sulphate + copper $\rightarrow$ copper sulfate + zinc. Show Answer Correct Answer: C) Iron cannot displace zinc. 56. LITMUS SOLUTION TURNS WHICH COLOUR IN ACID AND BASE? A) PURPLE, RED. B) MAGENTA, GREEN. C) YELLOW, RED. D) RED, BLUE. Show Answer Correct Answer: D) RED, BLUE. 57. Out of these gases which one is used in fire extinguishers A) NO2. B) CO2. C) H2s. D) Ill. Show Answer Correct Answer: B) CO2. 58. ..... reaction is a reaction between an acid and a base to form a salt. A) Crystallization. B) Neutralization. C) Both. D) None. Show Answer Correct Answer: B) Neutralization. 59. What is the colour of hydrated Copper (II) sulphate? A) Brown. B) White. C) Blue. D) Pink. Show Answer Correct Answer: C) Blue. 60. THESE ARE EXAMPLES OF NATURAL INDICATORS A) CHINA ROSE. B) HIBISCUS. C) SHOE FLOWER. D) ALL THE ABOVE. Show Answer Correct Answer: D) ALL THE ABOVE. ← PreviousNext →Related QuizzesScience QuizzesClass 7 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books