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Chemistry Quiz 54 (20 MCQs)

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1. Process from gas to liquid.
2. What is the formula formed from the atom U and W. [Proton number of U = 7; W = 9]
3. Whatis the correct way to handle chemicals in the laboratory?
4. A combination of substances that are not chemically combined is called a(n) .....
5. What is the meaning of Synthetic Rubber?
6. A reaction in which energy is gained or absorbed.
7. Which of the following solutions exactly neutralises 25.0 cm3 of 0.05 mol dm-3 barium hydroxide solution?
8. Material produced from living or recently living plants or animals and their metabolic byproduct is?
9. Combinations of 2 or more substances (elements and compounds) that are physically blended together.
10. What kind of charge do electrons have?
11. A pure substance made of the same type of atoms is called a(n)
12. Applies chemistry to solve problems by developing chemicals for useful purposes.
13. The amount of space that matter occupies
14. The density of pyrite is 5g/cm3 . This is an example of
15. In a family or column, the elements have similar properties because they all have the same number of
16. Water is important because .....
17. Molecules are held close together in an orderly fashion with little freedom of motion.
18. The energy transferred as a result of a temperature difference.
19. In which state of matter are the atoms tightly packed together?
20. A solid composed of atoms, ions or molecules arranged in a pattern that is periodic in three dimensions.
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