###### Extraction and the uses of metals

Which compound is a raw material for aluminum industry?

Which compound is a raw material for aluminum industry?

The most important aluminum ores are presently bauxite containing aluminum in the form of hydrated aluminum oxide $$Al_2O_3 * H_2O$$

###### Extraction and the uses of metals

What is aluminium oxide formula?

What is aluminium oxide formula?

The correct answer is $$Al_2O_3$$

What is aluminium oxide formula?

The correct answer is $$Al_2O_3$$

###### Extraction and the uses of metals

What physical properties are typical for aluminum?

What physical properties are typical for aluminum?

Aluminium is a white solid with a high boiling point.

###### Extraction and the uses of metals

What is the melting point of aluminum?

What is the melting point of aluminum?

###### Extraction and the uses of metals

Which of the following formulas corresponds to hematite?

Which of the following formulas corresponds to hematite?

The correct answer is $$Fe_2O_3$$

###### Extraction and the uses of metals

As the impurity in the original ore, sulfur is present in the form of compounds $$CaSO_4$$ or $$FeS_2$$. What forms in the process of reduction of iron?

As the impurity in the original ore, sulfur is present in the form of compounds $$CaSO_4$$ or $$FeS_2$$. What forms in the process of reduction of iron?

The correct answer is $$SO_2$$

###### Extraction and the uses of metals

When iron reacts with a solution of hydrochloric acid the salt forms of the following composition.

When iron reacts with a solution of hydrochloric acid the salt forms of the following composition.

This reaction is: $$Fe + 2HCl \to FeCl_2 + H_2$$

###### Crude oil

Which of the hydrocarbons are crude oil?

Which of the hydrocarbons are crude oil?

Crude oil consists of liquid hydrocarbons dissolved there in an gaseous and solid hydrocarbons.

###### Crude oil

Specify true proposition:

A) Oil refining - a physical process;

B) Cracking - a physical process

Oil refining - a physical process. Cracking - a chemical process

###### Crude oil

How the boiling temperature of hydrocarbons varies with the increasing number of carbon atoms in the hydrocarbon molecules

How the boiling temperature of hydrocarbons varies with the increasing number of carbon atoms in the hydrocarbon molecules

With the increasing number of carbon atoms in hydrocarbon molecules the boiling temperature of these hydrocarbons increases.

###### Crude oil

Specify the crude oil fraction with the lowest boiling point

Specify the crude oil fraction with the lowest boiling point

###### Crude oil

In the thermal cracking of a single molecule of alkane, two molecules are formed. What are they?

In the thermal cracking of a single molecule of alkane, two molecules are formed. What are they?

In the thermal cracking from one molecules of alkane, alkane and alkene molecules are formed.

###### Crude oil

Specify true proposition:

A) The quality of gasoline is determined by its detonation resistance;

B)  The quality of gasoline is characterized by its octane number.

Both propositions are true

###### Crude oil

What octane number complies to gasoline with the best detonation resistance?

What octane number complies to gasoline with the best detonation resistance?

Octane number 96 complies to gasoline with the best detonation resistance.

###### Synthetic polymers

What are polymers?

What are polymers?

Polymers are high-molecular compounds.

###### Synthetic polymers

Which of the reactions is represented by the polymerization reaction?

Which of the reactions is represented by the polymerization reaction?

This reaction is $$n CH_2 = CH_2 → (─ CH_2 ─ CH_2 ─)_n$$

###### Synthetic polymers

Which polymer refers to synthetic?

Which polymer refers to synthetic?

###### Synthetic polymers

What has the spatial shape of the polymer molecules?

What has the spatial shape of the polymer molecules?

The rubber has spatial form 1 of the molecules.

###### Synthetic polymers

From which materials synthetic fibers are prepared?

From which materials synthetic fibers are prepared?

Synthetic fibers are prepared from cellulose.

###### Synthetic polymers

Low molecular weight compound, from which polymer is synthesized called:

Low molecular weight compound, from which polymer is synthesized called:

###### Synthetic polymers

What are the main methods of obtaining high-molecular compounds?

What are the main methods of obtaining high-molecular compounds?

The correct methods are polycondensation and polymerization.

###### The industrial manufacture of chemicals

Which substance is used to produce ammonia in the industry?

Which substance is used to produce ammonia in the industry?

Atmospheric nitrogen is used to produce ammonia in the industry.

###### The industrial manufacture of chemicals

. For the equilibrium shift towards the formation of ammonia it is necessary  to...

. For the equilibrium shift towards the formation of ammonia it is necessary  to...

For the equilibrium shift towards the formation of ammonia it is necessary to increase the pressure and to lower the temperature.

###### The industrial manufacture of chemicals

How is it possible to increase the output of ammonia in the industry?

How is it possible to increase the output of ammonia in the industry?

The circulation of nitrogen-hydrogen mixture increases the output of ammonia in the industry.

###### The industrial manufacture of chemicals

. What is used in the production of ammonia as a raw material:

. What is used in the production of ammonia as a raw material:

The correct answer: nitrogen and hydrogen.

###### The industrial manufacture of chemicals

True or not propositions about the production of ammonia?

A. In the industry ammonia  is produced by reacting chloride

ammonium and calcium oxide.

B. Synthesis of ammonia in the industry is carried out under high

pressure.

Synthesis of ammonia in the industry is carried out under high

pressure

###### The industrial manufacture of chemicals

What substance forms explosive mixtures with hydrogen?

What substance forms explosive mixtures with hydrogen?

Hydrogen forms explosive mixtures with oxygen.