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АНГЛ ХИМИЯ 201-250

Total questions: 50

Worksheet time: 50mins

Name
Class
Date
1.

Specify the formula of the exhausted slake

a)

CaO

b)

NaCl

c)

CaH2

d)

CaCO3

e)

Сa(OH)2

2.

Number of the electrons in atom of sulphur is equal to

a)

6

b)

10

c)

18

d)

16

e)

32

3.

Specify the maximal number of electrons on Р-orbital

a)

2

b)

8

c)

6

d)

10

e)

14

4.

The charge of a proton is equal

a)

-

b)

+

c)

0

d)

1,6

e)

6,02×1023

5.

Define number of atoms of chlorine in 0,25 moles

a)

1,5×1023

b)

6,02×1023

c)

6,02×10-23

d)

1,1×1010

e)

0,5×1025

6.

Constant of Avogadro (N_A) is equal to

a)

l

b)

g/mole

c)

mole-1

d)

g/mole

e)

kg/mole

7.

With what substance СаО is cooperates

a)

Na2O

b)

H2SO4

c)

Ca

d)

K

e)

KOH

8.

What a degree oxidation of zinc in the zincate ion (ZnO )₂-²

a)

+1

b)

+3

c)

-2

d)

+2

e)

-4

9.

What element forms amphoterous oxides

a)

Na

b)

Ca

c)

Ba

d)

Mg

e)

Al

10.

Specify the aqua complex connections

a)

[Al(H2O)6]Cl3

b)

[LiAlH4]

c)

Na2[Be(OH)4]

d)

[Ag(NH3)3Cl]Cl

e)

[Pt(NH3)3Cl3]Cl

11.

Calculate quantity of structural units in 0,25 moles of Н2

a)

6,02×1023

b)

3,01×1023

c)

6,02×10-23

d)

6,02×1020

e)

6,02×1010

12.

Define a degree of oxidation a complex-former in Na2 [Cu(OH)4]

a)

-1

b)

-2

c)

+2

d)

+1

e)

+3

13.

What from hydroxides shows amphoterous character

a)

NaOH

b)

CA(OH)2

c)

Mg(OH)2

d)

Al(OH)3

e)

KOH

14.

What value has the рН in the alkaline environment

a)

pH<7

b)

pH+7

c)

pH-7

d)

pH>7

e)

pH=7

15.

What maximal degree of oxidation is shown with nitrogen

a)

+1

b)

+3

c)

0

d)

=6

e)

+5

16.

Specify the correct name - K2[PtBr4]

a)

potassium tetraboronoplatinum (IV)

b)

tetraborate platinum potassium (II)

c)

potassium tetraboronoplatinum (II)

d)

potassium platinum bromide

e)

tetraborono platinum potassium

17.

Define the sum of spin quantum number for - 2d7

a)

1,5

b)

1

c)

3

d)

2

e)

0,5

18.

Calculate a charge of a complex ion of the formed chrome (III) for [Cr(H2O)5Cl]

a)

+3

b)

2+

c)

+1

d)

0

e)

-1

19.

Specify the type of hybridization of carbon in a molecule СО2

a)

sp2

b)

sp3

c)

sp

d)

sp3d2

e)

s2p3

20.

Define a degree of oxidation of chromium in CaCr2O7

a)

+1

b)

+2

c)

+3

d)

+6

e)

+5

21.

Specify nonmetals

a)

Al;O

b)

P;Ca

c)

Li;Na

d)

O;Fe

e)

S;P

22.

Specify the hydrophosphate of calcium

a)

CaHPO4

b)

Ca3P2

c)

Ca3(PO4)2

d)

Ca3(PO3)3

e)

CaH

23.

What of this metals meets in the nature in a native condition

a)

Ca

b)

Ag

c)

Fe

d)

Na

e)

Mg

24.

Specify metal with valence (ІІІ) and (І)

a)

Ca

b)

Mg

c)

Al

d)

Ag

e)

Zn

25.

Define a degree of oxidation of sulphur in Na2SO4

a)

2

b)

-4

c)

-6

d)

+6

e)

+4

26.

What concentration of a solution received by dissolution 10g salts in 30g of water

a)

5%

b)

10%

c)

20%

d)

30%

e)

25%

27.

Balance the oxidation-reduction reaction by method of electronic balance in the answer specify number of moles of the HCl for reaction Al + HCl →AlCl3 + H2

a)

6

b)

1

c)

3

d)

2

e)

5

28.

Specify the formula of calculation of a mass part of substance

a)

w(x)=mp-pa×100%

b)

w(x)=m(x)/mp-pa×100%

c)

w(x)=mp-pa/m(x)

d)

w(x)=m(p-pa)/100%

e)

w(x)=m(x)

29.

Specify the restorer

a)

Cl+5→Cl0

b)

Cl0→Cl-1

c)

Cl0→Cl+5

d)

Cl+7→Cl+1

e)

Cl+7→Cl+1

30.

Two liters of a solution of nitrate acid contains 12,6 g HNO3. Calculate the molar concentration of a solution

a)

1M

b)

2M

c)

3M

d)

0,1M

e)

0,01M

31.

Specify correct expression of speed for reaction 2Fe + O2 = 2FeO

a)

V=k[Fe]2·[O2]

b)

V=k/[O2]

c)

V=k[FeO]2

d)

V=k[FeO]

e)

V=k[O2]

32.

What painting in the alkaline environment the litmus has?

a)

red

b)

white

c)

pink

d)

blue

e)

colourless

33.

Calculate, in how many time will increase speed of reaction at increase

temperatures from 0 up to 20 °С, the temperature factor is equal 2

a)

4

b)

2

c)

8

d)

18

e)

32

34.

What electronic formula of Al

a)

1S22S22p63S23p3

b)

1S22S22p63S23p1

c)

1S22S22p63S23p6

d)

1S22S22p63S23p0

e)

1S22S22p63S1

35.

What value рН the sour environment has

a)

pH=7

b)

pH>7

c)

pH<7

d)

pH>10

e)

pH<3

36.

What volume of oxygen was allocated at decomposition of 2 moles of  КСlО3 on reaction 

KClO3 → KCl + O2

a)

11,2

b)

22,4

c)

1,12

d)

44,8

e)

5,6

37.

What from resulted below salts are exposed to hydrolysis

a)

K2SO4;NaNO2

b)

NaNO3;K2S

c)

AlCl3;KCl

d)

K2SO4;BaCl

e)

Na2S;Na2SO3

38.

How many g of the dissolved substance contains in 205г 8 %-s' solution of К2СО3

a)

20

b)

1

c)

5

d)

10

e)

15

39.

Specify the correct name [PtCl3(NH3)3]Br

a)

aminochlorinoplatinum bromide

b)

triaminotrichlorinoplatinum (VI) bromide

c)

platinum trichlorinotriamino bromide

d)

bromide triamino chlorino platinum (VI)

e)

platinum (VI) chlorinoamino bromide

40.

Finish the equation of reaction in the answer specify substance – х: AgCl + K2S →x +KCl

a)

Ag S

b)

Ka g

c)

Ag 2S

d)

SAg

e)

Ag

41.

Define the coordination number for [CO(NH3)5Cl]Cl2

a)

1

b)

5

c)

7

d)

6

e)

9

42.

From 400g of 50 %-s' solution of H2SO4 by evaporation has removed 100g of water. What is the mass part of the remained solution of H2SO4 is equal?

a)

5,2

b)

10,3

c)

11,2

d)

33,2

e)

66,7

43.

Define a degree of oxidation of chlorine in KClO3 

a)

+5

b)

+1

c)

+7

d)

-5

e)

-7

44.

What concentration of a solution received by dissolution of 5g salts in 45g of water

a)

5%

b)

10%

c)

20%

d)

30%

e)

40%

45.

Balance the oxidation-reduction reaction by method of electronic balance in the answer specify number of molls of the H2O for reaction H2S + H2SO4 → S + H2O

a)

1

b)

2

c)

3

d)

5

e)

6

46.

What weight of K₃PO₄ should be taken for its preparation of 8 % solutions in weight of 250g?

a)

10г

b)

30г

c)

20г

d)

35г

e)

55г

47.

Specify a degree of oxidation of oxygen in OF2

a)

+1

b)

+4

c)

-1

d)

+2

e)

-2

48.

Define the normality of a solution of a sulfuric acid, in 250ml of which it contains 24,5g H2SO4

a)

1

b)

4

c)

3

d)

0,5

e)

2

49.

Specify the correct expression of speed for reaction: Сs + О2 = СО2(г)

a)

V=k[O2]

b)

V=k[C]· [O2]

c)

V=k[CO2]

d)

V=k[O]2

e)

V=k[C]

50.

What painting in the sour environment the litmus has?

a)

blue

b)

white

c)

red

d)

pink

e)

colourless

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