Prevention of Corrosion

Q.

What is galvanization?

Q. The iron (iii) oxide, Fe_2O_3 reacts with CO to give iron and CO_2 Fe_2O_3 + 3CO →2Fe +3CO_2 The reaction of 480.0 g Fe_2O_{} with excess of CO yields 252.0 g iron. Thus.percentage yeld is (Fe = 55) a. 100.0% C. 75.0% b. 91.2% d. 50.0%

Q. 27. What quantity of copper oxide will react with 2.80L of hydrogen at NTP?

Q. Which of the following methods cannot be employed in order to prevent corrosion?

1. Covering the surface by paint
2. Covering the surface by some chemical
3. Allowing the surface to interact with moisture
4. Providing the sacrificial electrode of another metal

Q. Galvanization is applying a coating of:

1. $Cr$
2. $Cu$
3. $Zn$
4. $Pb$

Q.

what happens when dihydrogen is reacted with Copper (II) Oxide ?

Q. What happens to oxygen during welding process

Q. The types of bonds present in $CuS{O}_4.5H_{2}O$ are

1. Covalent , co - ordinate covalent

2. Electrovalent, covalent, dative and hydrogen bond

3. Electrovalent, covalent

4. Electrovalent

Q. The method(s) by which corrosion can be prevented is/are:

1. By cathodic protection
2. Galvanisation
3. Keeping the metal in sunlight
4. Covering the surface with paint, grease, oil etc.