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Chemistry Practise Questions!

Subject

Chemistry

Type

Exam Practice

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1. Subject of chemistry. Goals and problems of chemistry. The place of chemistry in everyday
life.
2. Atom and molecule structure and difference.
3. Mole, molar mass.
4. Relative atomic and molecular masses.
5. Structure of atom. Difference in properties between neutrons, protons and electrons?
6. Simple and complexion substances. Allotropic modifications.
7. What is element? What elements are most important for humans and present in body in highest
quantities? What is the difference between element and simple compound?
8. The structure of Periodic System of Elements (by D.I. Mendeleev). Periodic law.
9. What elements are called metals? What is the difference in electron structures between metals
and nonmetals? In what part of Periodic system can we find metals?
10. What elements are called nonmetals? What is the difference in electron structures between
nonmetals and metals? In what part of Periodic system can we find nonmetals?
11. What elements are called radioactive? What is the difference between radioactive and
nonradioactive elements? Isotopes.
12. What is valency and what is difference between valency and oxidative state? Give examples
of elements with constant and variable valency.
13. Classification of inorganic substances. What is the difference between organic and inorganic
substances?
14. The law of mass conservation. How do we use this law in life & industry?
15. What is acid? What are the differences between acids and other substances? What acids do you
know and how can we classify them?
16. What is base? What are the differences between bases and other substances? What elements
can form bases and what bases are strongest?
17. What are oxides? Their differences from other substances? How can we classify oxides by
their ability to react with water?
18. What are salts? The difference of salts and other substances? How can we classify salts?
19. What phenomenon do we call chemical reaction? What features of chemical reaction do we
know? How can we classify chemical reactions?
20. What chemical reactions do we call reversible and irreversible?
21. What chemical reactions do we call exothermic and endothermic?
22. What chemical reactions are called homogeneous and heterogeneous?
23. What chemical reactions do we call red-ox reactions?
24. What is catalyst and where do we use catalysts? What is the influence of catalyst on the rate of
chemical reaction?
25. What phenomenon do we call chemical equilibrium?
26. What are solutions and where do we use them?
27. Characteristics of solutions. Define the notions: solubility, saturation and concentration?
28. What substances are called electrolytes and non electrolytes? Differences in properties between
these substances.
29. What phenomenon do we call dissociation? How can we check is given substance electrolyte or
it’s not?
30. What substances are called strong and weak electrolytes? Why some substances are strong or
weak electrolytes?
31. What is cation and anion? Can substance consist of only cations or anion? Prove your
conclusion/
32. What value is pH and what can we calculate with the help of this value?
33. What is electrolysis? Where do we use electrolysis?

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34. What phenomenon is called metal corrosion? Metal corrosion is chemical or physical process?
Prove your conclusion.
35. Metals and their properties. Give examples and tell about chemical properties of metals of the
1
st
and 2
nd
main groups of Periodic System of Elements.
36. Metals and their properties. Give examples and tell about chemical properties of d-metals from
6
th
and 7
th
secondary groups of Periodic System of Elements.
37. Hydrogen. Chemical and physical properties of hydrogen. Sources of hydrogen production.
38. Tell about the “family” of elements from 7
th
main group of Periodic System of Elements
(called halogens). Name and give examples.
39. Tell about the “family” of elements from 6
th
main group of Periodic System of Elements
(called “oxygen family” or “chalcogens”). Name and give examples.
40. Tell about the “family” of elements from 5
th
main group of Periodic System of Elements
(called “nitrogen family”). Name and give examples.

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