This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Equation for Potash Alum is A) $K_2SO_4.Al$. B) $K_2SO_4.Al_2\left(SO_4\right)_3.24H_2O$. C) $\left[Zn\left(OH\right)_2\right]$. D) $ Nahco_3 $. Show Answer Correct Answer: B) $K_2SO_4.Al_2\left(SO_4\right)_3.24H_2O$. 2. The difference in number of water molecules in gypsum and plaster of paris is- A) 5/2. B) 2. C) 1/2. D) 3/2. Show Answer Correct Answer: D) 3/2. 3. Which of these salt can be prepared by decomposition reaction? A) Calcium chloride. B) Sodium chloride. C) Iron sulphide. D) Calcium carbonate. Show Answer Correct Answer: A) Calcium chloride. 4. A substance with a ph of higher that 7.5 is a? A) Home dog doggity. B) Base. C) Acid. D) Salt. Show Answer Correct Answer: B) Base. 5. The effect of ant bite \{formic acid\} can be neutralised by rubbing ..... which contains zinc carbonate. A) Slaked lime. B) Milk of magnesia. C) Quick lime. D) Calamine lotion. Show Answer Correct Answer: D) Calamine lotion. 6. When litmus is added to a acidic solution it turns A) Blue. B) Pink. C) Red. D) White. Show Answer Correct Answer: C) Red. 7. Why is excess Copper (II) oxide added to dilute Sulphuric (VI) acid during the preparation of Copper (II) sulphate? A) To ensure that all the Copper (II) oxide has reacted. B) To remove excess Copper (II) oxide. C) To ensure that all the acid has reacted. D) To ensure that the salt is formed faster. Show Answer Correct Answer: C) To ensure that all the acid has reacted. 8. The correct way of making a solution of acid in water is to A) Put water in acid. B) Put acid in water. C) Put acid and mix. D) None of these. Show Answer Correct Answer: B) Put acid in water. 9. The word 'acid' comes from Latin word A) Base. B) Salt. C) Acidus. D) Sour. Show Answer Correct Answer: C) Acidus. 10. Vitamin C is actually ..... acid. A) Nitric Acid. B) Ascorbic Acid. C) Citrus Acid. D) Tartaric Acid. Show Answer Correct Answer: B) Ascorbic Acid. 11. Which one of the following is the king of acids? A) Sulfuric acid. B) Hydrochloric acid. C) Nitric acid. D) Carbonic acid. Show Answer Correct Answer: A) Sulfuric acid. 12. Before testing carbonate ion, one reagent is need to add together with carbonate ion.What is the reagent? Before testing carbonate ions, one reagent needs to be added together with carbonate ions.What is reagent? A) Sodium hydroxide / sodium hydroxide. B) Hydrochloric Acid / Acid Hydrochloric. C) Iron (2) Sulphate / Wild (2) Sulfat. D) Distilled water / air suling. Show Answer Correct Answer: B) Hydrochloric Acid / Acid Hydrochloric. 13. ACIDS HAVE A SWEET TASTE. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 14. Which Salt is form with the following acid-Hydrochloric Acid A) Chloride. B) Sulfate. C) Nitrate. D) None of the above. Show Answer Correct Answer: A) Chloride. 15. Name the Reaction made By salts when acidic and basic react with each other? A) Acidic Salt. B) Basic salt. C) Baking soda. D) Neutralization Reaction. Show Answer Correct Answer: D) Neutralization Reaction. 16. Acid +metal gives ..... + ..... A) Salt + hydrogen. B) Salt + oxygen. C) All the above. D) None of the above. Show Answer Correct Answer: A) Salt + hydrogen. 17. Salt has Solubility because it dissolves in water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. True or false:The number 7 on the pH scale indicates that a substance is neutral. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. What are the products of neutralisation reaction? A) Acid and base. B) Salt and water. C) Acid and water. D) Base and water. Show Answer Correct Answer: B) Salt and water. 20. Soap is A) Basic. B) Acidic. C) Neutral. D) Salt. Show Answer Correct Answer: A) Basic. 21. All alkalies are bases and all bases are alkalies. YES/NO A) YES. B) NO. C) CANNOT BE ANSWERED. D) None of the above. Show Answer Correct Answer: B) NO. 22. Which of the following salts is insoluble? A) Aluminium chloride. B) Copper (II) Sulphate. C) Sodium chloride. D) Calcium carbonate. Show Answer Correct Answer: D) Calcium carbonate. 23. Two types of acids are A) Organic acids. B) Mineral acids. C) Both a and b. D) None of these. Show Answer Correct Answer: C) Both a and b. 24. Colour of litmus in distilled water: A) Purple. B) Blue. C) Red. D) White. Show Answer Correct Answer: A) Purple. 25. Baking powder contains, baking soda and- A) Potassium hydrogen tartarate. B) Calcium bicarbonate. C) Sodium carbonate. D) Vinegar. Show Answer Correct Answer: A) Potassium hydrogen tartarate. 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