This quiz works best with JavaScript enabled. Home > Science > Chemistry – Quiz 51 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 51 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The monomer of a protein is a(n) ..... A) Monosaccharides. B) Lipids. C) Nucleotides. D) Amino acids. Show Answer Correct Answer: D) Amino acids. 2. The saltiness of seawater is the result of this property A) Reactivity. B) Composition. C) Solubility. D) None of above. Show Answer Correct Answer: C) Solubility. 3. # neutrons + # protons = ..... A) Atomic number. B) Atomic thing. C) Mass Number. D) Valence Electrons. Show Answer Correct Answer: C) Mass Number. 4. What is the mass in grams of 6.25 mol of copper (II) nitrate? A) 126 g. B) 785 g. C) 625 g. D) 1172 g. Show Answer Correct Answer: D) 1172 g. 5. Different atoms and/or molecules combined but not bonded A) Mixture. B) Element. C) Protons. D) Compound. Show Answer Correct Answer: A) Mixture. 6. The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is A) 3. B) 6. C) 8. D) 10. Show Answer Correct Answer: D) 10. 7. Most halogen form compounds by A) Gaining an electron to form a negative ion. B) Losing an electron to form a positive ion. C) Losing protons. D) Joining with both calcium and carbon. Show Answer Correct Answer: A) Gaining an electron to form a negative ion. 8. Which acid is present in lemon? A) Citric acid. B) Lactic acid. C) Marlic acid. D) Tartaric acid. Show Answer Correct Answer: A) Citric acid. 9. What is a mixture of potassium nitrate powdered charcoal and sulphur called? A) Brass. B) Paint. C) Gun powder. D) Aluminium. Show Answer Correct Answer: C) Gun powder. 10. Bases have a pH of ..... A) 1-6. B) 8-14. C) 7. D) 0. Show Answer Correct Answer: B) 8-14. 11. A substance with a pH of 8 has a pOH of A) 2. B) 6. C) 8. D) 10. Show Answer Correct Answer: B) 6. 12. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be A) 1 : 1 : 1. B) 1 : 16 : 2. C) 2 : 16 : 1. D) 2 : 16 : 2. Show Answer Correct Answer: B) 1 : 16 : 2. 13. What element contains 26 protons? A) Iron. B) Sodium. C) Aluminum. D) Helium. Show Answer Correct Answer: A) Iron. 14. What does DNA stand for? A) Dubstep Nucleic Acid. B) Deoxygen Nucleic Acid. C) Deoxyribonucleic Acid. D) Harambe. Show Answer Correct Answer: C) Deoxyribonucleic Acid. 15. The major component used in preparation of different types of glasses is A) Silica. B) Sodium borate. C) Sodium silicate. D) Calcium silicate. Show Answer Correct Answer: A) Silica. 16. Which biomolecule contains pastas and breads? A) Lipid. B) Protein. C) Nucleic Acid. D) Carbohydrate. Show Answer Correct Answer: D) Carbohydrate. 17. Subatomic particles with a positive charge A) Neutrons. B) Atomic mass. C) Protons. D) Isotopes. Show Answer Correct Answer: C) Protons. 18. What is the branch of physics that is relevant to chemistry in terms of how thermal energy converted to and from other forms of energy and how it affects matter? A) Thermostat. B) Thermodynamics. C) Radio dynamics. D) Spontaneity. Show Answer Correct Answer: B) Thermodynamics. 19. An example of a gas is A) A rock. B) Carbon dioxide. C) Water. D) A pencil. Show Answer Correct Answer: B) Carbon dioxide. 20. Which of the following has the weakest intermolecular forces? A) CH3F. B) CH4. C) C3H8. D) C2H6. Show Answer Correct Answer: B) CH4. ← PreviousNext →Related QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9Chemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books