Chemistry Quiz 16 (25 MCQs)

Quiz Instructions:

Select an option to see the correct answer instantly.

1. An element's identity is determined by the number of

2. The high reactivity of fluorine is due to?

3. According to modern atomic theory, the exact location of _____ is uncertain

4. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

5. It is the properties that can be measured or observed without changing the materials chemical composition

6. Zone refining is used for the purification of

7. When ionic compounds are named, the name of a monatomic anion will end in which of the following suffixes?

8. Homo nuclear molecules contain?

9. Choose one ionic compound from the following set of compounds

10. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

11. What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?

12. An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element.

13. _____ refer to the ingredients or constituents.

14. Which of the following compounds have the same empirical formula?

15. Which charged particle is positive?

16. Biogas majorly contains?

17. An atom that has a charge after losing or gaining electrons is called

18. Which substance would take a long time to cool off?

19. When acids and bases are added together, they produce

20. A neutral atom that contains 11 protons, also contains _____ electrons

21. A(n) _____ is an ion with a positive (+) charge.

22. Protons are the determination for the _____

23. The chemical used as a fixer in photography is?

24. The atomic number is the number of _____ in the nucleus.

25. It is the temperature at which the vapor pressure is equal to the external or atmospheric pressure.