Chemistry Quiz 20 (25 MCQs)

Quiz Instructions:

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1. What type of elements form ionic bonds?

2. What atom matches this electron configuration? [Xe] 6s25d9

3. Urea contains nitrogen.

4. Symbol of copper is

5. Which molecular chemical bond found commonly in organic compounds?

6. How many significant figures are present in 0.0025

7. How many principles does green chemistry implement?

8. A reaction in which energy is gained or absorbed.

9. The study of substances and processes occurring in living things.

10. Hydrogen peroxide is a(n)

11. Name one use for kerosene?

12. Which are of chemistry focuses on molecules that contain carbon?

13. Which food contains small amounts of caffeine?

14. An atom is electrically neutral because

15. Which of the following chemical equations represents aneutralisation reaction?

16. 18-carat gold is three-fourth gold and one-forth other metals Pure gold is.

17. What type of bond occurs between two different molecules due to polarity?

18. How many carbon atom/s are present in the compounds CaCO3?

19. A change in a substance that does not involve a change in the chemical identity of the substance

20. Calculate the molecular mass of $ H_2O$ . ( Atomic mass of $ H=1$, $ O=16$ )

21. Matter can be defined as anything that

22. Matter that has a uniform and definite composition

23. How many atoms are present in 46 u of Na

24. Which electronic structure is correct for an element with 17 electrons?

25. Mass percent of phosphorus in calcium phosphate is