This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 39 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 39 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A part of a sample with uniform composition and properties A) Phase. B) Homogeneous Mixture. C) Heterogenous Mixture. D) Compound. Show Answer Correct Answer: A) Phase. 2. Changing the phase, size or shape of something ..... A) Chemical change. B) Physical Change. C) Suspension. D) Colloid. Show Answer Correct Answer: B) Physical Change. 3. Number of moles present in 22.0g of carbondioxide is A) 2. B) 22. C) 0.5. D) 0.25. Show Answer Correct Answer: C) 0.5. 4. Anything that has mass & takes up space A) Gravity. B) Force. C) Matter. D) Volume. Show Answer Correct Answer: C) Matter. 5. Which of the following is NOT an example of a chemical reaction? A) Wood Burning. B) A cake baking in an oven. C) Melting Ice Cream. D) Mixing Vinegar and Baking Soda. Show Answer Correct Answer: C) Melting Ice Cream. 6. Which of the following will not undergo reaction? A) Zinc metal + zinc oxide. B) Iron metal + copper oxide. C) Zinc metal + iron oxide. D) Magnesium + iron oxide. Show Answer Correct Answer: A) Zinc metal + zinc oxide. 7. $ \ \ ZnS\ +\ \ HCI\ \longrightarrow\ ZnCl\ \ +H\ \ S$ A) $ \ \ 5 Zn S\ +\ \ 2HCL\ \longrightarrow\ 4 ZnCl\ \ +H_ 4\ \ S$. B) $ \ \ 2ZnS\ +\ \ 2HCI\ \longrightarrow\ ZnCl_2\ \ +H_2S$. C) $ \ \ 2ZnS\ +\ \ 2HCI\ \longrightarrow\ ZnCl_2\ \ +H_3S$. D) None of above. Show Answer Correct Answer: B) $ \ \ 2ZnS\ +\ \ 2HCI\ \longrightarrow\ ZnCl_2\ \ +H_2S$. 8. If a mystery element is shiny, brittle and a conductor, you would look under which category? A) Metals. B) Nonmetals. C) Metalloids. D) Elements. Show Answer Correct Answer: C) Metalloids. 9. Oxygen was discovered by which of the following scientists? A) J. Priestly. B) J. Black. C) Ibn e sina. D) You. Show Answer Correct Answer: A) J. Priestly. 10. Which subatomic particle has a neutral charge. A) Protons. B) Neutrons. C) Electrons. D) Nucleus. Show Answer Correct Answer: B) Neutrons. 11. What is the IUPAC name for CH3CH2CH(CH3)CH3? A) 1, 1-dimethylpropane. B) 2-ethylpropane. C) 2-methylbutane. D) 3-methylbutane. Show Answer Correct Answer: C) 2-methylbutane. 12. The study of chemicals that, in general, do not contain carbon. A) Biochemistry. B) Inorganic chemistry. C) Organic chemistry. D) Physical Chemistry. E) Analytical Chemistry. Show Answer Correct Answer: B) Inorganic chemistry. 13. PH measures the presence or what kind of ions? A) Sulfur. B) Oxygen. C) Nitrogen. D) Hydrogen. Show Answer Correct Answer: D) Hydrogen. 14. The minimum amount of energy required to get a reaction to start. A) Activation energy. B) Catalyst. C) Enzymes. D) Calories. Show Answer Correct Answer: A) Activation energy. 15. The boiling point of water is a physical property and not a chemical property because- A) When water is heated to its boiling point, it changes into a new substance with new properties. B) When water is cooled to its boiling point, it changes from a solid to a liquid and has new properties. C) When water is heated to its boiling point, it changes from a liquid to a solid and only changes how it reacts with other substances. D) When water is heated to its boiling point, it changes from a liquid to a gas without changing into a new substance. Show Answer Correct Answer: D) When water is heated to its boiling point, it changes from a liquid to a gas without changing into a new substance. 16. Compared to ionic compounds, ..... generally have lower melting points and boiling points A) Elemental. B) Bonded. C) Double-bonded. D) Covalent. Show Answer Correct Answer: D) Covalent. 17. A neutral species that has an unpaired electron is called a ..... A) Electrophile. B) Nucleophile. C) Carbanion. D) Free radical. Show Answer Correct Answer: D) Free radical. 18. Chemical reactions that absorb more energy than they release are called A) Exothermic. B) Catalyzed. C) Endothermic. D) Activated. Show Answer Correct Answer: C) Endothermic. 19. Which property of Group 18 elements increases when going down the Group in the Periodic Table? A) Forces of attraction. B) Reactivity. C) Solubility in water. D) Electrical conductivity. Show Answer Correct Answer: A) Forces of attraction. 20. Halogenoalkanes can undergo SN1 and SN2 reactions with aqueous sodium hydroxide. Which halogenoalkane will react fastest with a 0.1 moldm-3 solution of aqueous sodium hydroxide? A) 2-chloro-2-methylpropane. B) 2-iodo-2-methylpropane. C) 1-chlorobutane. D) 1-iodobutane. Show Answer Correct Answer: B) 2-iodo-2-methylpropane. ← 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