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 (KNO₃) 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?

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): Generally an alloy of lead and tin is used as a material of the fuse wire. Reason (R): Alloy of lead and tin has a higher melting point than copper and aluminium. Select the correct answer from the code given below : Code: