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Chemistry Quiz 33 (25 MCQs)

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1. A student calculated the % composition of the elements in the compound Pb3(PO4)2 and said that one element represented 16.8%. Which element was this?

2. It explains the properties of solids and liquids in terms of the intermolecular forces of attraction and the kinetic energy of the individual particles.

3. What is the main organ of the respiratory system?

4. To what does the term valence refer?

5. It is the total number of protons and neutrons in the nucleus of an atom.

6. What is the difference between O18 and O16

7. How many grams are there in 3.30 x 1023 molecules of N2I6?

8. The main use of salt in the diet is to

9. Sodium will typically _____ electron(s) when forming an ionic bond.

10. The total number of electrons in a neutral atom equals the number of

11. Organic molecules come from _____ things and always contain at least _____ and _____

12. H+ ions are usually found in _____ solutions.

13. Which of the following has the smallest atomic mass?

14. Which gas is used to manufacture vanaspati from vegetable oil is

15. The atomic mass is the number of _____ in the nucleus.

16. What is the nucleus of an atom?

17. Valence electrons are found

18. Natural rubber is a polymer derived from?

19. Uranium-235 has 92 protons. How may neutrons do it have?

20. Fats, oils, and cholesterol are all types of

21. What is Calcium sulphate?

22. The method that cannot be used for removing permanent hardness of water is

23. A solution with very little solvent

24. The symbol for Sodium

25. When disaccharides are changed to monosaccharides, the common chemical process involved is

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Chemistry Quiz 33 (25 MCQs)

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