This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 30 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. State the changes in the methyl orange indicator inside the conical flask containing potassium hydroxide solution, KOH when it reaches end point. A) Yellow to red. B) Yellow to orange. C) Red to yellow. D) Pink to colorless. Show Answer Correct Answer: B) Yellow to orange. 2. Non-crystalline solids are ..... A) Amorphic solids. B) Amorphorous solids. C) Amorphous solids. D) None of above. Show Answer Correct Answer: C) Amorphous solids. 3. Which particles make up the nucleus of an atom? A) Protons and neutrons. B) Electrons and protons. C) Electrons, protons, and neutrons. D) Electrons and neutrons. Show Answer Correct Answer: A) Protons and neutrons. 4. The study of carbon containing compounds. A) Organic Chemistry. B) Inorganic Chemistry. C) Physical Chemistry. D) Biochemistry. Show Answer Correct Answer: A) Organic Chemistry. 5. Something that takes up space and has mass. A) Volume. B) Matter. C) Mass. D) Density. Show Answer Correct Answer: B) Matter. 6. A substance formed when two or more elements are chemically bonded together A) Element Soup. B) Pure Element. C) Ion. D) Compound. Show Answer Correct Answer: D) Compound. 7. Identify the functional group present in HCOCH2CH3. A) Ester. B) Ketone. C) Aldehyde. D) Alcohol. Show Answer Correct Answer: C) Aldehyde. 8. How many valence electrons are in the Halogen family elements? A) 10. B) 9. C) 8. D) 7. Show Answer Correct Answer: D) 7. 9. The electrons involved in the formation of a chemical bond are called A) Dipoles. B) S electrons. C) Lewis electrons. D) Valence electrons. Show Answer Correct Answer: D) Valence electrons. 10. Solid, liquid and gas are examples of? A) Phases. B) Temperature. C) Scale. D) Refute. Show Answer Correct Answer: A) Phases. 11. An ..... does not allow electricity or heat to flow through it easily. A) Combustion. B) Conductor. C) Insulator. D) Luster. Show Answer Correct Answer: C) Insulator. 12. Which particle has a positive charge? A) Electron. B) Orbital. C) Proton. D) Neutron. Show Answer Correct Answer: C) Proton. 13. What year was the periodic table made? A) 1986. B) 1869. C) 1932. D) 1847. Show Answer Correct Answer: B) 1869. 14. Air, water, glass and antacid tablets are (#####) A) Homogeneous. B) Heterogeneous. C) Metric system. D) Matter. Show Answer Correct Answer: D) Matter. 15. A change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties A) Physical change. B) Physical property. C) Chemical change. D) Chemical property. Show Answer Correct Answer: C) Chemical change. 16. How many valence electrons do elements in Group 2A have? A) 12. B) 4. C) 1. D) 2. Show Answer Correct Answer: D) 2. 17. The chemical equation shows the reaction between excess sulphuric acid solution with sodium hydroxide solution.2NaOH (aq) + H2SO4 (aq) $\rightarrow$ Na2SO4 (aq) + 2H2O12.5 cm3 of 0.5 mol dm-3 sulphuric acid solution neutralises 50 cm3 of sodium hydroxide. Determine the concentration of the sodium hydroxide solution. A) 0.10 mol dm-3. B) 0.20 mol dm-3. C) 0.25 mol dm-3. D) 0.50 mol dm-3. Show Answer Correct Answer: C) 0.25 mol dm-3. 18. Process from liquid to solid. A) Freezing. B) Deposition. C) Evaporation. D) Melting. Show Answer Correct Answer: A) Freezing. 19. Mixture, such as mixed nuts or dry soup mix, in which different materials are unevenly distributed and are easily identified. A) Suspension. B) Homogeneous mixture. C) Heterogeneous mixture. D) Colloid. Show Answer Correct Answer: C) Heterogeneous mixture. 20. Substance formed in a chemical reaction A) Reactant. B) Product. C) Compound. D) Molecule. Show Answer Correct Answer: B) Product. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books