Corrosion can be defined as the deterioration of materials by chemical processes. Of these, the most important by far is electrochemical corrosion of metals, in which the oxidation process M ? M⁺ + e^– is facilitated by the presence of a suitable electron acceptor, sometimes referred to in corrosion science as a depolarizer.

Correct Option: B

Corrosion can be defined as the deterioration of materials by chemical processes. Of these, the most important by far is electrochemical corrosion of metals, in which the oxidation process M ? M⁺ + e^– is facilitated by the presence of a suitable electron acceptor, sometimes referred to in corrosion science as a depolarizer.

The chemistry of the nitrogenous bases is really the key to the function of DNA. It allows something called complementary base pairing. Cytosine can form three hydrogen bonds with guanine, and adenine can form two hydrogen bonds with thymine.
Guanie Cytosine

Correct Option: B

The chemistry of the nitrogenous bases is really the key to the function of DNA. It allows something called complementary base pairing. Cytosine can form three hydrogen bonds with guanine, and adenine can form two hydrogen bonds with thymine.
Guanie Cytosine

Ammonia gas that dissolves in water forms a solution of ammonium hydroxide (NH₄OH). This solution (including the gas) is a strong base and will make the solution alkaline. H₂O + NH₃ OH^– + NH⁴⁺

Correct Option: A

Ammonia gas that dissolves in water forms a solution of ammonium hydroxide (NH₄OH). This solution (including the gas) is a strong base and will make the solution alkaline. H₂O + NH₃ OH^– + NH⁴⁺

A Galvanic cell, also known as battery, is an electrochemical cell that derives electrical energy from spontaneous redox reactions taking place within the cell. It is typically used as a source of electrical power. By their nature, they produce direct current. A battery is a set of galvanic cells that are connected in parallel.

Correct Option: B

A Galvanic cell, also known as battery, is an electrochemical cell that derives electrical energy from spontaneous redox reactions taking place within the cell. It is typically used as a source of electrical power. By their nature, they produce direct current. A battery is a set of galvanic cells that are connected in parallel.

Soldering is the process of joining two metals by the use of a solder alloy, and it is one of the oldest known joining techniques. It is possible because of the property of cohesion, the interaction between adjacent parts of the same body and as acting throughout the interior of substance. Soldering leads to alloy formation at the layer between two metals.

Correct Option: C

Soldering is the process of joining two metals by the use of a solder alloy, and it is one of the oldest known joining techniques. It is possible because of the property of cohesion, the interaction between adjacent parts of the same body and as acting throughout the interior of substance. Soldering leads to alloy formation at the layer between two metals.