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бейорг 251-294

Total questions: 44

Worksheet time: 22mins

Name
Class
Date
1.

What is the molecular mass of air?

a)

34

b)

32

c)

27

d)

29

e)

25

2.

The equivalent amount of dissolved substance in liquid form is called such aconcentration?

a)

percent

b)

title

c)

is equivalent

d)

mole

e)

is molal

3.

What is the concentration ofa mole of solute in 1000 g of solvent solution called?

a)

mole

b)

is molar

c)

title

d)

percent

e)

is equivalent

4.

What is the concentration of the substance in 100 grams of solution?

a)

mole

b)

title

c)

is molar

d)

percent

e)

is normal

5.

Does thegenerator charge like anelectric charge?

a)

equals 0

b)

equals 1

c)

does not exist

d)

less

e)

there aremany

6.

Does the scattered electron get the same charge as the electron?

a)

less

b)

does not exist

c)

equals 0

d)

equals 1

e)

there are many

7.

What is the valency of atom B?

a)

2

b)

4

c)

5

d)

3

e)

1

8.

What is the concentration of the substance in 1 ml of solution?

a)

is equivalent

b)

mole

c)

percent

d)

title

e)

is molar

9.

Determine the molar mass of an unknown gas with a density of 1.16 in Ftop.

a)

40 g/mol

b)

44 g/mol

c)

62 g/mol

d)

50 g/mol

e)

32 g/mol

10.

What is the volume of one equivalent mass of oxygen under normal conditions?

a)

7.5 l

b)

4.4 l

c)

6.2 l

d)

4.8 l

e)

5.6 l

11.

Mass0.486 gstate the molar amount of magnesium present?

a)

0.03 mol

b)

0.04 mol

c)

0.02 mol

d)

0.05 mol

e)

0.01 mol

12.

Name the halogen with the highest electronegativity.

a)

Si

b)

At

c)

Fr

d)

I

e)

Br

13.

List the basic metals.

a)

Ve, Mg,Ca

b)

K, Sa, Al

c)

Na,K, Fr

d)

Na, Ca, Mg

e)

Li, K, Ve

14.

List the number of oxides that react with calcium hydroxide.

a)

O2, SO2

b)

СО2, НН3

c)

НН3, SO2

d)

N2, CO2

e)

CO2,SO2

15.

What metals react with sodium hydroxide?

a)

Ng, Ve

b)

Al,Ve

c)

Na, Fe

d)

Ca, Mg

e)

K, Al

16.

List the series in which hydroxides show amphoteric properties.

a)

Cu(OH)2,Ba(OH)2

b)

Al(OH)3,Fe(OH)2

c)

NaOH,Ca(OH)2

d)

Zn(OH)2, Cr(OH)3

e)

Ca(OH)2,Mg(OH)2

17.

Give the formula of calcium carbide.

a)

Ca(OH)2

b)

CaС2

c)

CaH2

d)

CaO

e)

CaCO3

18.

Water-soluble oxide.

a)

TiO2

b)

MnO2

c)

SnO2

d)

SiO2

e)

CO2

19.

During oxidation. S, F, Si, S N-metals are formed, which oxide is not solublein water?

a)

CO2

b)

NO2

c)

SiO2

d)

P2O5

e)

SO3

20.

Which of the oxides formedduring the oxidation of metals Al, zinc, copper, Ca, iron, Fe are soluble inwater?

a)

CuO

b)

Al2O3

c)

CaO

d)

FeO

e)

ZnO

21.

List the series of amphoteric oxides.

a)

Na2O, CaO

b)

SO2, P2O5

c)

Al2O3,CaO

d)

ZnO, MgO

e)

ZnO,BeO

22.

List the series of acidic oxides.

a)

SO2,P2O5

b)

Al2O3,CaO

c)

ZnO, Al2O3

d)

СО, Na2О

e)

Na2O, CaO

23.

List the series of basic oxides.

a)

Al2O3,CaO

b)

Na2O, CaO

c)

SO2, P2O5

d)

ZnO,Al2O3

e)

CO2, Na2O

24.

Show the order in which salts react with water to release oxygen

a)

КМnО4,СаСО3

b)

КСlO3,CaCO3

c)

NaNO2, CaCO3

d)

NaNO3, KClO3

e)

КСlО3, КМnO4

25.

Determine the mass of calcium oxide obtained from the mass of 333 g of calciumhydroxide.

a)

252

b)

240

c)

224

d)

272

e)

298

26.

Chlorine reacts with which compound?

a)

potassium

b)

fluorine

c)

oxygen

d)

sodium

e)

water

27.

Name the halogen with the highest electronegativity.

a)

Si

b)

astat

c)

G

d)

bromine

e)

iodine

28.

List the basic metals.

a)

Li,K, Rb

b)

Na, Ca, Mg

c)

K, Ca,Al

d)

Ve, Mg,Ca

e)

Li, K, Ve

29.

What is the pH value during the hydrolysis of ZnCl2?

a)

pH<7

b)

pH=0

c)

pH>7

d)

pH=7

e)

pH=14

30.

What does the symbol ΔH represent in the Gibbs equationΔG=ΔH-ТΔS?

a)

change in free energy

b)

entropy change

c)

temperature drop

d)

enthalpy change

e)

temperature increase

31.

If the initial reaction2NO(g)+O2(g)=2NO2 is tripled, how does the reaction rate change?

a)

18

b)

64

c)

27

d)

81

e)

9

32.

Which standard situation corresponds to a thermodynamic system?

a)

00K, 760 mm s. b.

b)

250K, 1 atm.

c)

2980K, 1 atm.

d)

2730K, 760 mm s.b.

e)

00С, 760 mm s. b.

33.

Under what conditions can the reaction take place at any temperature?

a)

N>0,S>0

b)

N<0,S>0

c)

N<0,S<0

d)

H=0,S=0

e)

N>0,S<0

34.

Which standard situation corresponds to a thermodynamic system?

a)

00C, 760mm.sb.

b)

250C, 760 mm.sb.

c)

2 atm,300

d)

2 atm, 220С

e)

1 atm,220С

35.

Who said that the thermal effect of a chemical reaction does not affect itsdrying stage, but only depends on the initial substances?

a)

Van't Goffa

b)

Laplace

c)

Hess

d)

Beptolle

e)

Lavoisier

36.

In what conditions can a chemical reaction proceed spontaneously?

a)

ΔH>0

b)

ΔG<0

c)

ΔS>0

d)

ΔH=0

e)

ΔG>0

37.

Which indicator corresponds to an exothermic reaction?

a)

Q<0

b)

ΔH<0

c)

Q=0

d)

ΔH>0

e)

ΔH=0

38.

In which aggregate state of water has the highest entropy value?

a)

is not dependent

b)

steam

c)

is liquid

d)

entropy does not depend on the aggregate state of matter

e)

ice

39.

What is the enthalpy of formation of a simple substance?

a)

is less than 0

b)

depends on the reaction type

c)

can have different values

d)

is greater than 0

e)

0

40.

15 gold when selling 200g. If it is a substance, what is its concentration?

a)

32

b)

28

c)

30

d)

22

e)

36

41.

How many grams of HCl are needed to prepare 0.5 ml of solution in light?

a)

22.4

b)

26

c)

18.2

d)

14.2

e)

16

42.

How many grams are 1 mole of sodium sulfate?

a)

142

b)

148

c)

130

d)

152

e)

136

43.

How many grams is 1 equivalent of sulfuric acid?

a)

49

b)

41

c)

59

d)

53

e)

38

44.

How many moles of hydrochloric acid will be needed to dissolve 80 g of iron (ll) oxide?

a)

1

b)

4

c)

3

d)

2

e)

6

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