This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Ocean water is only slightly basic. What might its pH value be? A) 5. B) 8. C) 12. D) 2. Show Answer Correct Answer: B) 8. 2. YOU NEED YOUR CODON CHART!mRNA:GGACCUAUUCAGWhat is the amino acid sequence coded for by the mRNA above? A) Gln-Ile-Pro-Gly. B) Pro-Gly-Stop-Val. C) Ser-Tyr-Arg-Gly. D) Gly-Pro-Ile-Gln. Show Answer Correct Answer: D) Gly-Pro-Ile-Gln. 3. The indicator that changes basic solution to green is A) Phenolphthalein. B) Turmeric. C) Methyl Orange. D) China rose. Show Answer Correct Answer: D) China rose. 4. The electrostatic charge means the atom A) Has no movement. B) Has a positive charge. C) Has lost or gained an electron. D) Has a negative charge. Show Answer Correct Answer: C) Has lost or gained an electron. 5. What is the substance with a neutral pH of 7? A) Milk. B) Water. C) Orange Juice. D) Blood. Show Answer Correct Answer: B) Water. 6. Always add the word " ..... " to the end when naming acids A) Base. B) Hydro. C) Acid. D) High. Show Answer Correct Answer: C) Acid. 7. Which drug is used for indigestion in the following A) Antibiotic. B) Analyst. C) Antacid. D) Anti-septic. Show Answer Correct Answer: C) Antacid. 8. Which is used as the antacid in the following? A) Calcium hydroxide. B) Magnesium hydroxide. C) Hydrochloric acid. D) Common salt. Show Answer Correct Answer: B) Magnesium hydroxide. 9. When the bee is pierced, it is released from its hill ..... A) Methanoic acid. B) Acetic acid. C) Amino acid. D) Hydrochloric acid. Show Answer Correct Answer: A) Methanoic acid. 10. When an equal strength acid and base are mixed, what kind of chemical reaction occurs? A) Neutralization. B) Combustion. C) Oxdation. D) Decomposition. Show Answer Correct Answer: A) Neutralization. 11. The H in pH stands for A) Hood. B) Happy. C) Hydrogen. D) Help. Show Answer Correct Answer: C) Hydrogen. 12. What is the chemical formula and common name of Copper sulphate? A) Chemical formula:CuSO$_{4}$ Common name:blue vitriol. B) Chemical formula:Cu$_{2}$SO$_{4}$$_{Common name:blue vitriol}$. C) Chemical formula:CoSO$_{4}$ Common name:Green vitriol. D) None of the above. Show Answer Correct Answer: A) Chemical formula:CuSO$_{4}$ Common name:blue vitriol. 13. Explain what happens when a strong acid and a strong base are poured into the same container. A) They form separate layers. B) They mix physically but not chemically. C) They break apart into separate elements. D) They react chemically to form a salt. Show Answer Correct Answer: D) They react chemically to form a salt. 14. The suffix-ic in the name of an oxyacid, implies that the polyatomic ion in the acid has a ..... suffix. A) -ous. B) -ate. C) -ide. D) -ite. Show Answer Correct Answer: B) -ate. 15. A substance that changes color when mixed with an acid or base is a(n) ..... A) Indicator. B) Neutralizer. C) Electricity. D) None of these. Show Answer Correct Answer: A) Indicator. 16. Brine solution is A) Aqueous solution of sodium hydroxide. B) Aqueous solution of sodium carbonate. C) Aqueous solution of sodium chloride. D) Aqueous solution of sodium bicarbonate. Show Answer Correct Answer: C) Aqueous solution of sodium chloride. 17. Which property is not associated with acids? A) Sour taste. B) Strong acids can burn you. C) Turns litmus paper blue. D) Reacts with metals. Show Answer Correct Answer: C) Turns litmus paper blue. 18. Hypochlorus (HOCl) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: A) Weak Acid. 19. A pH level of 7 indicates A) Acid. B) Base. C) Neutral. D) Non of the following. Show Answer Correct Answer: C) Neutral. 20. Based on statement below, choose the RIGHT statements about carboxylic (the answer could be more than one) A) Monocarboxylic acids are compound that containing two-COOH groups. B) Carboxylic acid has position isomer. C) Capric acid is straight carboxylic acid with eight carbon atom. D) Ethanoic acid has higher boiling point than ethanal. E) Carboxylic acid is a functional group isomer of eter. Show Answer Correct Answer: D) Ethanoic acid has higher boiling point than ethanal. 21. Hydrobromic (HBr) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: C) Strong Acid. 22. Which method is recommended to dilute an acid A) An acid is added to water. B) Water added to acid. C) All the above. D) None of the above. Show Answer Correct Answer: A) An acid is added to water. 23. Can an acid is reactive to glass and metal both A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. When put into a solution that is basic, phenolphthalein turns ..... A) Blue. B) Violet. C) Black. D) Magenta. Show Answer Correct Answer: D) Magenta. 25. Drain cleaner has a pH of 13. What is drain cleaner? A) An acid. B) A strong base. C) Neutral. D) A weak base. Show Answer Correct Answer: B) A strong base. ← 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