Alloys

Statement (A): Galvanized iron does not rust. Statement (R): Zinc has the efficiency of oxidation. Code:

Which one of the following is essential in corrosion of iron metal?

In the case of rusting, the weight of iron –

Consider these statements and choose the right answer from the given code: Statement (A): Normally it has been seen that iron goods covered with a brown powder called rust when they are unsheltered in the atmosphere. Statement (R): Rust or the brown powder is the result of deposition of tannin. Code:

Which one of the following alloys is called an amalgam?

Solder used in soldering metal pieces is an alloy of:

Bronze is an alloy of –

Percentage of Silver in German Silver is:

Which of the following alloys has a maximum percentage of Copper?

Check these statements : (i) Brass is an alloy of Copper and Zinc. (ii) Magnetite is the main ore of Aluminium. (iii) Amalgams are that substances which mainly involve mercury. (iv) Potassium Nitrate $(\mathrm{KNO}_3)$ is a chemical used in photography. Which of the above are true? Code :

Steel is further processed to obtain stainless steel by adding some element. Which one of the following is not used for this purpose?