Chemistry Quiz 4 (25 MCQs)

Quiz Instructions:

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1. What type of chemical reaction is this one? Al(OH)3 $\rightarrow$ Al2O3 + H2O

2. A substance containing atoms of two or more different elements chemically bonded together

3. When choosing a material to make a product, such as a soft drink container, the most important factor is _____

4. What are the smallest parts of pure substancesthat cannot be broken down intosimpler substances?

5. Which of the following is best classified as a homogeneous mixture?

6. Reactive metals Q must be stored in the paraffin oil to prevent reaction with the moisture in the air. What is Q?

7. Standard pressure is

8. Which is the best example of a pure substance?

9. Molecules are held close together in an orderly fashion with little freedom of motion.

10. Which compound is an amide?

11. Alkane molecules are made of which elements?

12. Cm3 of nitric acid requires 15.80 cm3 of 0.12 mol dm-3 barium hydroxide solution for complete neutralisation. The concentration of nitric acid is

13. How many moles are in 16.94g of water?

14. Rust forms because iron and oxygen are highly _____ elements

15. _____ are widely used in electric supply industry.

16. Every element has a unique name. Elements can also be represented by-

17. What is the symbol of Helium

18. X2+ and Y2-have the same number of electrons as Neon atom. Identify the element X and Y.

19. Who proved that burning is the chemical combination of the combustible material with then oxygen of the air?

20. The three values below have the same number of:10.714 m10.821 m13.646 m

21. The process in which a solid turns to a vapour without passing through an intermediate liquid state is.

22. Why is Carbon Dioxide not on the Periodic Table?

23. Elements that have properties of both metals and nonmetals.

24. An atom of element R has 14 neutrons. Nucleon number of element R is 27. In which Group and period R located in Periodic Table?

25. Matter with a composition that is always the same