Ch-12 Periodic Classification of Elements & Periodicity Leave a Comment / By abdulslambsn@gmail.com / October 6, 2025 Welcome To Your Quiz "Ch-12 Periodic Classification of Elements & Periodicity" Click on "Start Quiz" To Continue... 1. The number of electrons in valence shell of an element reflects its: Period Number Group Number Both None None 2. Generally metals form oxides: Acidic Basic Amphoteric None None 3. Variable valency is shown by: Group 1A Group 2A Group 7A group 1B None 4. keeping in view the sizes of atoms, which order is the correct one: Mg > Sr Ba > Mg Be > Mg Ra > Ba None 5. which one of the following oxides is amphoteric in nature: MgO Na2O SO2 ZnO None 6. Atomic number was discovered by Mosley in: 1913 1914 1915 1916 None 7. Non-metals usually exist as: liquids Gases Liquids or gases Waxy solids None 8. Ga has oxidation state: +3 +2 +4 +1 None 9. Hydrides can be classified into: Two types Three types Four types Five types None 10. Which of the following pairs are chemically dissimilar: Na and K Ba and Sr Zr and Hf Ca and Zn None 11. Which of the following has greatest metallic character: Mg Ca Al Cs None 12. Highest hydration energy is shown by: Na+ Mg+2 Al+3 Ga+3 None 13. Which of the following pair of atomic numbers represents 2A element: 3,11 3,12 4,20 3,20 None 14. Among the following elements the highest value of electron affinity is shown by: F Cl Br I None 15. Alkali metals in each period have: Smallest size Lowest Ionization Energy Highest Ionization Energy Lowest atomic radius None 16. Polymeric (Intermediate) hydride shall be formed by: Na K Be C None 17. The highest acidity is shown by: Mn2O7 Mn2O3 MnO2 MnO None 18. The covalent hydrides are usually: Liquids Gases Volatile Liquids or gases Waxy solids None 19. Which of the following oxides is Amphoteric in character: CaO CO2 SiO2 Sb2O3 None 20. Hydrogen can be placed with the element of group (IV-A) because both: Act as strong oxidizing agent Act as strong reducing agent Possess the property of catenation Form neutral oxides None 1 out of 4 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
