This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 43 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 43 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Baking Powder is ..... A) Baking Soda + Mild Base. B) Baking Soda + Mild acid. C) Only Baking Soda. D) Baking Soda + Sodium Carbonate. Show Answer Correct Answer: B) Baking Soda + Mild acid. 2. Acids react with A) Water to produce bases and salts. B) Salts to produce bases and water. C) Neither bases, salts nor water. D) Bases to produce salts and water. Show Answer Correct Answer: D) Bases to produce salts and water. 3. Hydrochloric acid + sodium hydroxide $\rightarrow$ sodium chloride + water A) This reaction is a neutralisation reaction. B) This reaction is a combustion reaction. C) This reaction is an oxidation reaction. D) This reaction is salty. Show Answer Correct Answer: A) This reaction is a neutralisation reaction. 4. Which is the stronger acids? A) PH 1. B) PH 8. C) PH 13. D) PH 7. Show Answer Correct Answer: A) PH 1. 5. Which pH levels indicated a strong acid? A) 1-3. B) 4-6. C) 8-11. D) 12-14. Show Answer Correct Answer: A) 1-3. 6. What type of paper is used to test acidity? A) Red paper. B) Blue paper. C) Lined paper. D) Litmus paper. Show Answer Correct Answer: D) Litmus paper. 7. HCl A) Chloric acid. B) Hydrochloric acid. C) Chlorous acid. D) Hydrochlorous acid. Show Answer Correct Answer: B) Hydrochloric acid. 8. When the pH of a solution becomes more basic, the number on the pH scale A) Decreases. B) Increases. C) Stays the same. D) Triples. Show Answer Correct Answer: B) Increases. 9. Sodium ethanoate (CH$_{3}$COONa) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: B) Weak Base. 10. Washing soda has the formula A) Na2CO3.7H2O. B) Na2CO3.10H2O. C) Na2CO3.H2). D) We can. Show Answer Correct Answer: B) Na2CO3.10H2O. 11. What pH range would you get for an acid? A) 0-6. B) 7. C) 7-14. D) 2-10. Show Answer Correct Answer: A) 0-6. 12. Which one of these have the highest pH level? A) Milk. B) Vinegar. C) Stomach acid. D) None of the above. Show Answer Correct Answer: C) Stomach acid. 13. Which of the following solutions has the lowest pH? A) 1 M HCl(aq). B) 1 M CH$_{3}$COOH(aq). C) 1 M NH$_{3}$(aq). D) 1 m NaOH (aq). Show Answer Correct Answer: A) 1 M HCl(aq). 14. What determines the number of hydrogens in your acid? A) There are always just one. B) Its the same as the charge of hydrogen. C) Its the same as the charge of the anion. D) Magic. Show Answer Correct Answer: C) Its the same as the charge of the anion. 15. Which is not a essential amino acid A) Methionine. B) Alanine. C) Arginine. D) Lysine. Show Answer Correct Answer: B) Alanine. 16. Which one of the following is an acid? A) Baking soda. B) Soap. C) Salt solution. D) Vinegar. Show Answer Correct Answer: D) Vinegar. 17. Calcium hydroxide is a A) Acid. B) Base. C) Salt. D) Indicator. Show Answer Correct Answer: B) Base. 18. When using your codon chart, what sequence can you use to find the correct amino acid? A) DNA. B) MRNA. C) TRNA. D) Any of these will do. Show Answer Correct Answer: B) MRNA. 19. Name the acid present in sting of an ant. A) Phenolphthalein. B) Citric acid. C) Hydrochloric acid. D) Formic acid. Show Answer Correct Answer: D) Formic acid. 20. Which nucleic acid only exists in the nucleus? A) MRNA. B) DNA. C) TRNA. D) RRNA. Show Answer Correct Answer: B) DNA. 21. Water-soluble alkali is called this A) Neutral. B) Alkaline. C) Alkalient. D) Acid. Show Answer Correct Answer: C) Alkalient. 22. How can you make a dull penny shiny? A) Dip it in vinegar. B) Wash it with soapy water. C) Put it in salt and water. D) Dip it in a vinegar and salt solution. Show Answer Correct Answer: D) Dip it in a vinegar and salt solution. 23. Carbonic acid A) H $ _ {2} $ co $ _ {3} $. B) H$_{2}$CrO$_{4}$. C) H$_{2}$C$_{2}$O$_{4}$. D) HCO$_{3}$. Show Answer Correct Answer: A) H $ _ {2} $ co $ _ {3} $. 24. Monomers of a protein are connected by ..... bonds. A) Covalent. B) Ionic. C) Peptide. D) Hydrogen. Show Answer Correct Answer: C) Peptide. 25. Measure of how acidic or basic something is. A) AH. B) BH. C) PH. D) Hp. Show Answer Correct Answer: C) PH. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Acids Quiz 1Class 7 Science Chapter 4 Acids Quiz 2Class 7 Science Chapter 4 Acids Quiz 3Class 7 Science Chapter 4 Acids Quiz 4Class 7 Science Chapter 4 Acids Quiz 5Class 7 Science Chapter 4 Acids Quiz 6Class 7 Science Chapter 4 Acids Quiz 7Class 7 Science Chapter 4 Acids Quiz 8Class 7 Science Chapter 4 Acids Quiz 9Class 7 Science Chapter 4 Acids Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books