CHAPTER 3 ATOMS AND MOLECULES (SET-3)

Questions in this test

1. <p>What does chemical formulas tell us _______</p>
2. <p>Name the ion that is not univalent is ________</p>
3. <p>A balanced Chemical equation is a direct consequence of ________</p>
4. <p>Which of the following is not a correct pair of elements and symbols?</p>
5. <p>Atom cannot be seen with the naked eye, what is the reason?</p>
6. <p>Polyatomic ion is:</p>
7. <p>How many times is an atom of sulfur heavier than an atom of carbon?</p>
8. <p>What is the valency of noble gases?</p>
9. <p>If 3 atoms of oxygen unit into a molecule, instead of the usual 2 we get __________</p>
10. <p>The formula of sodium carbonate is ________</p>