This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 29 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following will slow down the rate of a chemical reaction A) Absence of a catalyst. B) The concentration is increased. C) The temperature is increased. D) Both concentration and temperature is increased. Show Answer Correct Answer: A) Absence of a catalyst. 2. What subatomic particles are found in the nucleus and have a positive charge? A) Protons. B) Electrons. C) Neutrons. D) None of above. Show Answer Correct Answer: A) Protons. 3. Which substance is an element? A) Water (H2O). B) Ammonia (NH3). C) Chlorine (Cl). D) Carbon Dioxide (CO2). Show Answer Correct Answer: C) Chlorine (Cl). 4. When you have something that does not dissolve it is referred to as being A) Insoluble. B) A rock. C) A solid. D) A nail. Show Answer Correct Answer: A) Insoluble. 5. What element symbol is represented by O A) Chlorine. B) Carbon. C) Osmium. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 6. A forensic scientist uses chemistry to find information at the scene of the crime A) Organic chemistry. B) Analytical chemistry. C) Biochemistry. D) Theoretical chemistry. Show Answer Correct Answer: B) Analytical chemistry. 7. Which substance is not produced during the combustion of alkanes? A) CO2. B) CO. C) C. D) H2. Show Answer Correct Answer: D) H2. 8. A solid substance that form from a solution. A) Sediment. B) Fractional crystallization. C) Element. D) Precipitate. Show Answer Correct Answer: D) Precipitate. 9. Bond energy is the energy A) Required to break a chemical bond. B) Released when a chemical bond breaks. C) Required to form a chemical bond. D) Absorbed when a chemical bond forms. Show Answer Correct Answer: A) Required to break a chemical bond. 10. Which among the following is a NOT matter? A) Air. B) Gold. C) Water. D) Heat. Show Answer Correct Answer: D) Heat. 11. What is the definition of an element? A) The smallest part of any substance which can exist on its own. B) Two or more atoms chemically joined together (can be the same or can be different). C) A simple substance in which all the atoms are identical. D) Two or more different elements chemically joined together. Show Answer Correct Answer: C) A simple substance in which all the atoms are identical. 12. The building blocks of ..... are amino acids. A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic acids. Show Answer Correct Answer: C) Proteins. 13. STP (standard temperature and pressure) A) A reaction that releases energy in the form of heat. B) The process of burning something. C) Conditions of 0.00$^ \circ$C and 1 atm pressure. D) The study of energy changes that occur during chemical reactions and changes in state. Show Answer Correct Answer: C) Conditions of 0.00$^ \circ$C and 1 atm pressure. 14. The ..... is the substance being dissolved. A) Solute. B) Solvent. C) Mixture. D) Solution. Show Answer Correct Answer: A) Solute. 15. Which of the following is an exothermic process A) Evaporation of water. B) Reaction of water with quick lime. C) Sublimation of camphor. D) All of the above. Show Answer Correct Answer: B) Reaction of water with quick lime. 16. What product is formed when CH3CH(OH)CH3 is reacted with acidified potassium dichromate(VI)? A) CH3COOCH3. B) CH3CH2CHO. C) CH3CH2COOH. D) CH3COCH3. Show Answer Correct Answer: D) CH3COCH3. 17. What is the law of conservation of matter? A) The Law of Conservation of Matter states that during a reaction matter can be created and destroyed. B) The Law of Conservation of Matter states that during a reaction no matter is created nor destroyed. C) The Law of Conservation of Matter states that matter goes through changes called a phase change. D) None of above. Show Answer Correct Answer: B) The Law of Conservation of Matter states that during a reaction no matter is created nor destroyed. 18. If the mass of $ H_2O$ in a glass is $ 36g$ . then calculate the $ no.\ of\ moles$ if the $ molar\ mass$ of $ H_2O$ is $ 18g$ . HINT:use the following formula:$ No.\ of\ moles=\frac{Mass\ in\ g}{Molar\ mass}$ A) 2 moles. B) 0.5 moles. C) 5 moles. D) None of above. Show Answer Correct Answer: A) 2 moles. 19. Which statement about a homologous series is correct? A) Members of the series differ by CH3. B) Members of the series have the same physical properties. C) Members of the series have the same empirical formula. D) Members of the series have similar chemical properties. Show Answer Correct Answer: D) Members of the series have similar chemical properties. 20. Number of branches of chemistry A) 7. B) 2. C) 8. D) 5. Show Answer Correct Answer: C) 8. ← 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