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If the solvent boils at a temperature T₁ and the solution at a temperature T₂ , then the elevation of boiling point is given by:

T₂ - T₁

In the complex [Fe(H₂O)₅ (NO⁺)]SO₄. The oxidation state of iron is:

+1

In which among the following are the noble metals soluble?

Aqua regia

In a redox reaction if the emf is positive then the reaction is:

Spontaneous

If the electrode potentials of both the electrodes become equal in magnitude but opposite in sign then:

An electrochemical cell stops working

In an electrochemical galvanic cell:

Chemical energy changes into electrical energy

In an electrolytic cell:

Electrical energy changes into chemical energy

In high energy density batteries Lithium is used as an electrode because:

It has high negative reduction potential

Mendeleev-Claperon’s eqution for gases is:

 pV = nRT

Metal corrosion is ....

A spontaneous thermodynamic destruction metal as a result of exposure to chemical and electrochemical environment

Molarity is defined as the number of:

Moles of solute per liter of solution

Normal concentration of sulfuric acid (H₂SO₄) with titre of 0,0049 g / ml is equal:

0,10 н

Name the person who developed a table of elements which revealed regularities in elemental properties in 1869?

Dmitri Mendeleev

Normality is defined as the number of:

Equivalent weights of solute per liter of solution

NaCl in solid form does not conduct electricity because:

It does not ionize

0,5 moles of sugar (C₁₂H₂₂O₁₁) dissolved in 500 g of water. What is the freezing point of this solution (К_Н2О=1,86˚)?

-1,86˚ С         

Oxidation state of fluorine atom is equal:

0; -1           

Ostwald law described by equation:

Of four different laboratory solutions, the solution with the highest acidity has a pH of:

2

Pure substances are conductors of the second type with an ionic conductivity and that dissociate into ions when dissolved in water or when electricity pass through its molten, and conduct electricity ade called ...

electrolytes

Redox reactions in which the both oxidizing and reducing agents are composed into one molecule is called:

Intramolecular

Select a typical oxidizing agent:

KMnO₄

Select a typical reducing agent:

С ompound of iron (III) Fe³⁺

 

Select the oxidation process:

Select the oxidation process:

Select the reduction process:

Select the reduction process:

 

Select the definition of Faraday's 1^st law:

The mass of a substance produced at an electrode during electrolysis is proportional to the number of moles of electrons (the quantity of electricity) transferred at that electrode                          

Select cause of electrochemical corrosion: