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Worksheets

3 english

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Which shows variable valency

a)

s-block elements

b)

d-block elements

c)

p-block elements

2.

Most reducing agent is

a)

K

b)

Na

c)

Li

3.

If the valency shell electronic structure for an element is ns²np⁵, this element will belong to the group of

a)

Noble gases

b)

Alkali metals

c)

Halogens

4.

If the valency shell electronic structure for an element is ns¹, this element will belong to the group of

a)

Noble gases

b)

Alkali metals

c)

Halogens

5.

If the valency shell electronic structure for an element is ns²np⁶, this element will belong to the group of

a)

Alkali metals

b)

Noble gases

c)

Halogens

6.

Which will show maximum non-metallic character

a)

B

b)

Si

c)

Al

7.

Which of the following halogen acids is least acidic

a)

HCl

b)

HF

c)

HI

8.

Variable valency, in general, is exhibited by

a)

Alkali metals

b)

Noble gases

c)

Transition elements

9.

An element of atomic weight 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statements regarding this element is correct

a)

It belongs to the halogen group

b)

The formula of its oxide is MO

c)

It is a non-metal

10.

Which of the following oxides is most basic

a)

SO₂

b)

Al₂O₃

c)

Na₂O

11.

Determine the oxidation state of phosphorus in H₃PO₄

a)

+5

b)

+3

c)

+1

12.

Choose a compound in which the oxidation state of nitrogen is equal to +3:

a)

NH₃

b)

N₂O₃

c)

NO

13.

Choose a compound in which the oxidation state of nitrogen is equal to -3

a)

NH₃

b)

N₂O

c)

NO₂

14.

Choose the minimal oxidation state for sulphur

a)

-2

b)

+4

c)

+6

15.

Choose the maximal oxidation state for chlorine

a)

+3

b)

+7

c)

-1

16.

Which chemical element demonstrates a single possible oxidation state in compounds?

a)

Cl

b)

F

c)

Br

17.

Choose acidic oxide

a)

K₂O

b)

Al₂O₃

c)

SO₂

18.

Choose amphoteric oxide

a)

K₂O

b)

SO₂

c)

Al₂O₃

19.

Choose insoluble (solubility < 0.1 g per 100 g of H₂O) salt

a)

K₂SO₄

b)

BaSO₄

c)

NaCl

20.

Choose basic oxide

a)

K₂O

b)

SO₂

c)

Al₂O₃

21.

____ reactions release heat energy

a)

Neutralization

b)

Exothermic

c)

Endothermic

22.

____ reactions absorb heat energy

a)

Exothermic

b)

Endothermic

c)

Combustion

23.

Match the symbol of the element antimony

a)

Sb

b)

Si

c)

Sn

24.

Match the symbol of the element tungsten

a)

Ti

b)

W

c)

Ta

25.

Match the symbol of the element tin

a)

Sc

b)

Sb

c)

Sn

26.

Find the symbol of the element bismuth

a)

Bi

b)

Ba

c)

Be

27.

Find the symbol of the element fluorine

a)

Fe

b)

F

c)

Fl

28.

Find the symbol of the element mercury

a)

Mn

b)

He

c)

Hg

29.

Find the symbol of the element lead

a)

Pb

b)

Pd

c)

Po

30.

Find the symbol of the element silicon

a)

Sn

b)

Si

c)

Sb

31.

Translate this word into Russian: HYDROCARBON

a)

углеводород

b)

водород

c)

кислород

32.

Translate this word into Russian: CURRENT OF ELECTRICITY

a)

электрическая сила

b)

электрический ток

c)

электрическое сопротивление

33.

Translate this word into Russian: SOLUTION

a)

смешивание

b)

раствор

c)

жидкость

34.

Translate this word into Russian: HYDROCARBON

a)

кислород

b)

водород

c)

углеводород

35.

Translate this word into Russian: BEHAVIOUR

a)

поведение

b)

состояние

c)

реакция

36.

Translate this word into Russian: MOLTEN

a)

растворённый

b)

расплавленный

c)

насыщенный

37.

Translate this phrase into Russian: METHOD OF DEPOSITION METALS

a)

процесс ковки металлов

b)

способ формирования металлов

c)

метод осаждения металлов

38.

Find the definition of the word CHEMIST

a)

a scientist who has a special knowledge in chemistry

b)

a professional who studies physics

c)

an expert in biology

39.

Find the definition of the word ELECTRIC BALANCE

a)

a tool for measuring resistance

b)

an electric instrument for weighing

c)

a scale for measuring liquids

40.

Find the definition of the phrase CHEMICAL REACTION

a)

a natural process in which the atoms of chemicals mix and arrange themselves differently to form new substances

b)

the process of heating a substance

c)

a method of producing electricity

41.

Choose s-element

a)

Cl

b)

Mn

c)

Na

42.

Choose p-element

a)

Mn

b)

Cl

c)

Na

43.

Choose d-element

a)

Cl

b)

Na

c)

Mn

44.

What is the maximal number of electrons which can occupy all orbitals of the same s-sublevel?

a)

2

b)

4

c)

6

45.

What is the maximal number of electrons which can occupy all orbitals of the same p-sublevel?

a)

6

b)

4

c)

10

46.

What is the maximal number of electrons which can occupy all orbitals of the same d-sublevel?

a)

14

b)

10

c)

6

47.

What is the maximal number of electrons which can occupy all orbitals of the same f-sublevel?

a)

6

b)

10

c)

14

48.

How many unpaired electrons are there in the nitrogen atom (in its normal state)?

a)

1

b)

5

c)

3

49.

What is the number of electrons on the outer shell (level) of the chlorine atom?

a)

5

b)

7

c)

3

50.

Choose the electron configuration of the nitrogen atom (in its normal state):

a)

1s²2s²2p³

b)

1s²2s²2p⁴

c)

1s²2s¹2p³

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