This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 38 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When is it OK to eat or drink at the lab tables? A) Always. B) During group work, but not during lab activities. C) Never. D) During lab activities. Show Answer Correct Answer: C) Never. 2. It describes the distribution of electrons. A) Electron Configuration. B) Electron Formation. C) Electron Design. D) None of above. Show Answer Correct Answer: A) Electron Configuration. 3. Which are of chemistry focuses on molecules that contain carbon? A) Inorganic. B) Organic. C) Biochemistry. D) Quantitative. Show Answer Correct Answer: B) Organic. 4. It exist between all atoms and molecules. A) Ion dipole forces. B) London dispersion forces. C) Hydrogen bond. D) Dipole dipole forces. Show Answer Correct Answer: B) London dispersion forces. 5. What are the two main types of chemical bonds? A) Covalent and Van der Waals force. B) Hydrogen bond and ionic bond. C) Ionic bond and covalent bond. D) Hydrogen bond and Van der Waals force. Show Answer Correct Answer: C) Ionic bond and covalent bond. 6. The number of protons in the nucleus of an atom? A) Isotope. B) Atomic mass. C) Atomic number. D) Element. Show Answer Correct Answer: C) Atomic number. 7. Solutions and alloys are kinds of A) Heterogeneous mixtures. B) Homogeneous mixtures. C) Pure substances. D) Alloys. Show Answer Correct Answer: B) Homogeneous mixtures. 8. What is the molar mass of (NH4)2CO3? A) 144 g. B) 138 g. C) 96 g. D) 78 g. Show Answer Correct Answer: C) 96 g. 9. Which is heavier, a proton or an electron? A) A proton. B) An electron. C) They are the same. D) 6.02 x 1023. Show Answer Correct Answer: A) A proton. 10. Which of the following is NOT an intermolecular force? A) Covalent bonding. B) Dipole-dipole forces. C) Hydrogen bonding. D) None of above. Show Answer Correct Answer: A) Covalent bonding. 11. Conduction band electrons have more mobility than holes because they are A) Have negative charge. B) Need less energy to move them. C) Experience collision less frequently. D) Experience collision more frequently. Show Answer Correct Answer: C) Experience collision less frequently. 12. It is a negatively charged ion. Non-metals typically form them by gaining electrons.a) Anions b) cations c) cathode d anode A) Cations. B) Cathode. C) Anions. D) Anode. Show Answer Correct Answer: C) Anions. 13. A homogeneous mixture or one phase A) Solution. B) Solute. C) Solvent. D) Saturated solution. Show Answer Correct Answer: A) Solution. 14. What is the mass of 2.50 mol of oxygen gas (O2)? A) 40.0 g. B) 80.0 g. C) 16.0 g. D) 32.0 g. Show Answer Correct Answer: B) 80.0 g. 15. The difference between atoms and ions can be summarized by the following A) Atoms have equal numbers of protons and electrons, whereas ions do not. B) Atoms have equal numbers of neutrons, whereas ions do not. C) Atoms have equal numbers of protons and neutrons, whereas ion do not. D) None of above. Show Answer Correct Answer: A) Atoms have equal numbers of protons and electrons, whereas ions do not. 16. Solid turning directly into a gas.a) Evaporation b) solidification c) sublimation d) condensation A) Evaporation. B) Solidification. C) Sublimation. D) Condensation. Show Answer Correct Answer: C) Sublimation. 17. Bonds where there is unequal sharing of electrons are called A) Polar Covalent Bonds. B) Non-Polar Covalent Bonds. C) Ionic Bonds. D) London Forces. Show Answer Correct Answer: A) Polar Covalent Bonds. 18. According to Bohr's theory, an electron's path around the nucleus defines its A) Electric charge. B) Atomic mass. C) Energy level. D) Speed. Show Answer Correct Answer: C) Energy level. 19. CnH2n is the general formula for ..... series .i. Alkaneii. Alkeneiii. Cyclic alkaneiv. Cyclic alkene A) I and ii only. B) Ii only. C) Ii and iii only. D) Ii and iv only. Show Answer Correct Answer: C) Ii and iii only. 20. Basic unit of elements A) Homogeneous mixtures. B) Heterogeneous mixtures. C) Atom. D) Compound. Show Answer Correct Answer: C) Atom. ← 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