Objective: to check the level of students’ knowledge of the topic.
Grades: 1-3 (1b); 4-7 (2b); 9 (3b); 10 (4b), 11 (4b)
1-5 “2”; 6-10 “3”; 11-15 “4”; 16-20 “5”
Variant – 1
Part 1
1. In a sulfur atom, the number of electrons in the outer electron layer is:
1) 2 2) 3 3) 6 4) 8
2. The number of protons in the nucleus of an atom is equal to:
1) the ordinal number of the element 3) the period number
2) relative atomic mass 4) group number
3. The highest rate of interaction with water at room temperature is:
1) sodium 2) magnesium 3) cesium 4) aluminum
4. Chemical elements of the following series are arranged in the order of increasing reduction properties
1) Li – Be – B 2) Si – Al – Mg 3) Cs – K – Na 4) C – B – Be 5) Ca – Mg – Be
5) Element the scheme of the electron shell structure of which atom is 2e8e8e2e:
1) exhibits less strong metallic properties than potassium;
2) shows stronger metallic properties than barium;
3) has a larger atomic radius than strontium;
4) has a lower higher positive oxidation degree than scandium;
5) has a greater number of electron layers of the electron shell of the atom than zinc.
6. Beryllium oxide interacts with substances whose formulae are:
1) O2 2) NaOH 3) NaCl 4) HCl 5) NaCl
7. The rate of the chemical reaction, the scheme of which is 2Al + 6HCl = 2AlCl3 + 3H2
will decrease if: 1) increase the pressure 2) cool the acid
3) to extract aluminum 4) to increase the acid concentration
5) add an inhibitor to the acid
Part 2.
8. Write the formula of the substance that is omitted in the transformation diagram:
Na2ZnO2 → X → Zn(OH)2 → ZnO
Write the molecular equations of the reactions that can be used to carry out
these conversions.
9. Given three substances: aluminum oxide, hydrochloric acid, potassium hydroxide. Make three
molecular and corresponding ionic equations of reactions that are possible
between these substances.
10. Give a characterization, based on all the features studied, of the classification of chemical
reactions to the interaction between:
1) aluminum and chlorine
2) phosphorus (V) oxide and water
3) potassium hydroxide and sulfuric acid
Option – 2
Part 1
1. The nucleus charge of the silicon atom is: 1) +14 2) +28 3) +3 4) +4
Nitrogen and phosphorus atoms have the same
1) number of neutrons in the nucleus of the atom 3) the value of the relative atomic mass
2) number of protons in the nucleus of the atom 4) number of valence electrons
3. Reactions between substances whose formulas are:
1) H2S(r) and Zn(t) 2) Al2O3 and H2SO4 (r) 3) HCl(r) and AlCl3 (r) 4) VeC12(r) and NH3 (r)
4. The chemical elements of the series are arranged in order of increasing oxidative properties:
1) N – C – B 2) Br – Cl – F 3) P – S – Cl 4) F – Cl – Br 5) S – P – Si
An element which has the following structure: 2e8e5e:
1) exhibits stronger nonmetallic properties than sulfur;
2) has greater electronegativity than silicon;
3) has a larger atomic radius than chlorine;
4) has a higher positive oxidation degree than chlorine;
5) has a greater negative oxidation degree than sulfur.
6. Zinc hydroxide interacts with substances whose formulae are:
1) HNO2 2) NaCl 3) NaCl 4) MgO 5) KOH
7. The rate of the chemical reaction whose scheme is Zn + 2HCl = ZnCl2 + H2 will increase if:
1) grind the zinc 2) cool the acid 5) add an inhibitor
3) to extract zinc 4) to increase the acid concentration
Part 2.
8. Write the formula of the substance that is omitted in the transformation diagram:
Cr2O3 → X → Na2CrO2 → CrCl3
Write the molecular equations of the reactions that can be used to
these conversions.
9. Given three substances: potassium hydroxide, beryllium oxide, hydrochloric acid. Make up three
molecular and corresponding ionic equations of reactions that are possible
between these substances.
10. Give a characterization on all the features of the chemical reaction classification studied
The interaction between:
1) aluminum and oxygen
2) magnesium hydroxide and sulfuric acid
3) calcium oxide and water
