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Chemistry Quiz 31 (25 MCQs)

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1. Which gas is used in preparing soft drinks?
2. What is the exam definition of saturated?
3. What term describes a solid changing to a liquid?
4. The symbol and valency of ammonium is
5. Which number should go in the blank? _____ H2 + O2 $\rightarrow$ 2 H2O
6. When you change from gas to liquid it is called..
7. How many Valance electrons does Iodine Have?
8. An _____ does not allow electricity or heat to flow through it easily.
9. Which water is similar to ordinary water and also uses in atomic reactors?
10. Which of the following is true of water?
11. Which of the following elements shows the same oxidation number in all its compounds?
12. Cm3 of 0.2 mol dm-3 sodium hydroxide solution is titrated with 0.1 mol dm-3 sulphuric acid. What is the volume of sulphuric acid needed to neutralise sodium hydroxide solution?
13. Which of the following is malleable?
14. Acetylene is burned in welding torches according to the following chemical reaction:2 C2H2 + 5 O2 $\rightarrow$ 4 CO2 + 2 H2OHow many oxygen (O) atoms are found in the reactants?
15. Conservation of mass means
16. What is the monomer of polyethene?
17. State of matter that has no definite shape, but has a definite volume
18. Elements which are shiny, conduct electricity and heat are called _____
19. Those are an example of synthetic rubber, except
20. The path that on electron makes around a nucleus is called.
21. Carbon containing compounds such as $ CO_2^{}$ & $ bicarbonates$ are studied in _____
22. _____ is a complex chain of processes in Which carbon compounds circulate among air, water living organisms and minerals.
23. States that in any physical or chemical reaction, mass is conserved. It can be changed from one form to another, but cannot be created or destroyed.
24. Formula mass of HF
25. How many neutrons would Potassium-41 (K) have?
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