This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 20 (10 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following chemical equations represents aneutralisation reaction? A) 4HCl + MnO2 $\rightarrow$ MnCl2 + Cl2 + 2H2O. B) 2HCOOH + Mg $\rightarrow$ Mg(HCOO)2 + H2. C) H2SO4 + CuO $\rightarrow$ CuSO4 + H2O. D) 2HNO3 + PbCO3 $\rightarrow$ Pb(NO3)2 + CO2 + H2O. Show Answer Correct Answer: C) H2SO4 + CuO $\rightarrow$ CuSO4 + H2O. 2. The molecular formula for Nitric acid A) HNO3. B) HNO2. C) HNO. D) None of above. Show Answer Correct Answer: A) HNO3. 3. What are the two main types of energy? A) Endothermic and exothermic. B) Spontaneous and nonspontaneous. C) Potential and kinetic. D) Entropy and enthalpy. Show Answer Correct Answer: C) Potential and kinetic. 4. Who developed the modern day periodic table of elements? A) Shultz. B) Mendeleev. C) Hooke. D) Darwin. Show Answer Correct Answer: B) Mendeleev. 5. In the following unbalanced equation, what coefficients would have to go in the blanks (left to right) in order for it to become balanced? ..... Al + ..... HCl $\rightarrow$ ..... AlCl3 + ..... H2 A) 1:3:1:2. B) 3:2:1:2. C) 2:6:2:3. D) 6:2:2:3. Show Answer Correct Answer: C) 2:6:2:3. 6. An atomic mismatch within the region where two grains meet which is called A) Grain border. B) Grain divide. C) Grain boundary. D) None of above. Show Answer Correct Answer: C) Grain boundary. 7. The basic particle from which all elements are made. A) Acid. B) Atom. C) Mixture. D) Element. Show Answer Correct Answer: B) Atom. 8. To separate a mixture of soil and water what separation method is used? A) Filtration. B) Chromatography. C) Distillation. D) Evaporation. Show Answer Correct Answer: A) Filtration. 9. An atom or molecule which has gained or lost one or more of its valence electrons A) Chemical Formula. B) Covalent Bond. C) Ion. D) Compound. Show Answer Correct Answer: C) Ion. 10. To draw a Lewis structure, one must know the A) Atomic mass of each atom. B) Bond length of each atom. C) Ionization energy of each atom. D) Number of valence electrons in each atom. Show Answer Correct Answer: D) Number of valence electrons in each atom. ← PreviousRelated 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