This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 28 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Which among the following is a NOT matter? A) Air. B) Gold. C) Water. D) Heat. Show Answer Correct Answer: D) Heat. 3. 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. 4. The building blocks of ..... are amino acids. A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic acids. Show Answer Correct Answer: C) Proteins. 5. 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. 6. The ..... is the substance being dissolved. A) Solute. B) Solvent. C) Mixture. D) Solution. Show Answer Correct Answer: A) Solute. 7. 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. 8. 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. 9. 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. 10. 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. 11. 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. 12. Number of branches of chemistry A) 7. B) 2. C) 8. D) 5. Show Answer Correct Answer: C) 8. 13. 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. 14. Non-crystalline solids are ..... A) Amorphic solids. B) Amorphorous solids. C) Amorphous solids. D) None of above. Show Answer Correct Answer: C) Amorphous solids. 15. 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. 16. The study of carbon containing compounds. A) Organic Chemistry. B) Inorganic Chemistry. C) Physical Chemistry. D) Biochemistry. Show Answer Correct Answer: A) Organic Chemistry. 17. 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. 18. Identify the functional group present in HCOCH2CH3. A) Ester. B) Ketone. C) Aldehyde. D) Alcohol. Show Answer Correct Answer: C) Aldehyde. 19. How many valence electrons are in the Halogen family elements? A) 10. B) 9. C) 8. D) 7. Show Answer Correct Answer: D) 7. 20. 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. ← PreviousNext →Related QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books