For students all specialities

INDIVIDUAL WORK-16

For students all specialities

MODUL 2

The greatest number of molecules at 20°C is found in 1 liter of :

a

Water

b

Hydrogen chloride

c

Ammonia

d

Hydrogen sulfide

f

Hydrogen

Which of the given statements is correct:

a

Energy of ionization of atom of potassium is smaller, than energy of ionization of atom of sodiu

b

Energy of ionization of atom of wolfram is smaller, than energy of ionization of atom of molibdenenum

c

Electronegativity of atom of chlorine is larger, than electronegativity of atom of sulfur

d

In tantalum the metal properties are expressed stronger, than in a niobium

f

Oxidizing activity selenium is larger, than oxidizing activity of bromine

What of the For students all specialities compounds has greatest reductive properties:

a

Н2О

b

Н2Te

c

Н2S

d

Н2Se

How many electrons are on 5р-sublevel of atom of indium in the normal and exited state:

a

3 and 4

b

2 and 3

c

2 and 4

d

1 and 2

f

0 and 2

What values of quantum numbers n, l, m, ms characterize the valent electron in atom of potassium:

a

4, 0, 0, +1/2

b

5, 0, +1, +1/2

c

4, 1, +1, +1/2

d

5, 1, –1, –1/2

f

4, 1, –1, –1/2

It is known, that number of group of periodic system determines the maximal valency of elements, which located in this group. Which of the given elements will be exception of this rule:

a

Aluminium

b

Chromium

c

Fluorine

d

Copper

f

Phosphorus

Moseley law characterizes:

a

Charge of a nucleus of atom of an element

b

Amount of electrons at an energy level

c

Value of quantum For students all specialities numbers

d

Frequency of fluctuations of characteristic X-ray radiation

On which of the given schemes are shown the formation of a molecule of hydrogen from two atoms:

a

b

c

d

f

At temperature 150°C a chemical reaction is finished in 16 minutes. For what time this reaction will be finished at temperature 80°C, if its temperature coefficient is equal 2,5:

a

129,5 hour

b

24,6 hour

c

1 hour

d

83,2 hour

f

162,8 hour

Enthalpy of formation of a hydrogen sulphide, found by using of the following thermochemical equations

H2S(g) +3/2О2(g) = Н2О(g)+SO2(g); = –518,59 kJ

S(crist) + O2(g) = SO2(g); = –296,90 kJ

Н2(g) + 1/2О2(g) = Н2О(g); = –241,84 kJ

is equal to:

a

–64,18 kJ

b

–179,28 kJ

c

–1057,3 kJ

d

–20,15 kJ

f

–1101,31 kJ

Mix that contained 15 l of For students all specialities hydrogen and 15 l of nitrogen were left in presence of catalyst at increased pressure and heating. What gases and in what volumetric ratio will be in this reactionary mix after reaction, if the yield of the reaction product makes 50% from theoretically possible:

a

10 l of ammonia, 10 l of nitrogen

b

5 l of ammonia, 12,5 l of nitrogen, 7,4 l of hydrogen

c

5 l of ammonia, 5 l of nitrogen, 7,4 l of hydrogen

d

20 l of ammonia, 5 l of hydrogen

f

30 l of ammonia

The equilibrium gas mix

PCl5= PCl3+ Cl2

contains 30% of chlorine at pressure 1 atm. Find the equilibrium constant:

a

0,54

b

0,4

c

0,225

d

0,61

f

0,3

Дата добавления: 2015-11-05; просмотров: 2 | Нарушение авторских прав


documentazbhprl.html
documentazbhxbt.html
documentazbiemb.html
documentazbilwj.html
documentazbitgr.html
Документ For students all specialities