1. Which of the following is not an element of the periodic table?
2. What is the hybridization of carbon atoms in ethene (C₂H₄)?
3. Which of the following is a non-polar molecule?
4. Which of the following is the correct formula for ammonium sulfate?
5. Which of the following compounds exhibits geometrical isomerism?
6. Which of the following is not an element of the periodic table?
7. Which of the following elements has the highest ionization energy?
8. Which type of bond is present in sodium chloride (NaCl)?
9. Which of the following is the correct electronic configuration of an oxygen atom?
10. Which of the following is the correct IUPAC name for CH₃CH₂OH?
11. What is the main component of natural gas?
12. Which of the following processes is used to obtain pure metal from its ore?
