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Chemistry Quiz 43 (25 MCQs)

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1. What is the valency of hydrogen?
2. Organic polymer can be divided into
3. What is the symbol of Chlorine
4. A type of mixture in which the composition of the mixture is the same all throughout.
5. Finding out how much nitrogen is in a sample of air
6. Several drops of nitric acid are added to a test tube that is filled with potassium chloride solution. What is the most suitable pH value for the mixture?
7. What state of matter floats through the air with high energy
8. Why is water NOT on the periodic table?
9. What charge do electrons have?
10. What type of element usually has a dullappearance and is generally NOT a good conductor of heat or electricity?
11. When bromine water is shaken with a liquid organic compound, it is rapidly decolourized. What can be determined from this test?
12. A sample of a substance has a mass of 7.3 g and a volume of 2.8 cm3. What is the objects density?
13. In the chemical reaction iron plus oxygen $\rightarrow$ iron oxide,
14. What is the relative formula mass of CO2?
15. A heterogeneous mixture consists of two or more phases.
16. A block has a mass of 54g and a volume of 20.0cm3. What is the density of the block?
17. What is the symbol of Copper
18. A mixture in which two or more substances are evenly mixed but not bonded together
19. What is the left part of a chemical equation called? H 2 + $\rightarrow$ H2O
20. How many elements are in NaCl?
21. The mass of a lead cube is 64 grams. This is an example of
22. The minimum amount of energy required to get a reaction to start.
23. The group made up of alcohols and acids
24. Which is smaller _____ Mg or Mg2+?
25. The life cycle of a product refers to _____
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