Alloys and Alloying Properties

Q. Misch metal is an alloy of

1. Lanthanide metals (90)% + Iron (5)% + Traces of S, C, Si, Ca and Al (5)%
2. Lanthanide metals (95-96)% + Iron (3)% + Traces of S, C, Si, Ca and Al (1)%
3. Lanthanide metals (94-95)% + Iron (4)% + Traces of S, C, Si, Ca and Al (1)%
4. Lanthanide metals (94-95)% + Iron (5)% + Traces of S, C, Si, Ca and Al

Q.

The composition of aqua-regia is

1. $\mathrm{Dil}.\mathrm{HCl}:\mathrm{Conc}.{\mathrm{HNO}}_{3}3:1$

2. $\mathrm{Conc}.\mathrm{HCl}:\mathrm{Dil}.{\mathrm{HNO}}_{3}3:1$

3. $\mathrm{Conc}.\mathrm{HCl}:\mathrm{Conc}.{\mathrm{HNO}}_{3}3:1$

4. $\mathrm{Dil}.\mathrm{HCl}:\mathrm{Dil}.{\mathrm{HNO}}_{3}3:1$

Q.

What is the use of duralumin and its composition ?

Q.

Permanent magnets are generally made of iron, steel, cobalt, nickel, or an alloy called__________.

Q.

What are the components of Duralumin?

Q. Misch metal is:

1. An alloy of lanthanide and copper
2. An alloy of lanthanide and nickel
3. An alloy of lanthanide, iron and carbon
4. An alloy of calcium and copper

Q. Gold dissolves in aqua-regia forming:

1. Auric chloride
2. Aurous chloride
3. Chloroauric acid
4. Aurous nitrate

Q.

Give the reaction for the formation of Aqua Regia.

Q. Which of the following elements is alloyed with copper to form brass

1. Lead

2. Silver

3. Zinc
4. Antimony

Q. Which of the following is the physical and chemical characteristics of interstitial compounds.

1. They have high melting points, higher than those of pure metals.
2. They are very hard, some borides approach diamond in hardness.
3. They retain metallic conductivity and chemically inert.
4. All of the above

Q. What is an alloy? Give two examples with their chemical composition.

Q. The percentage of lanthanides and iron, respectively, in Misch metal are:

1. 50, 50
2. 75, 25
3. 90, 10
4. 95, 5

Q.

What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.

Q. Which of the following alloys contain(s) Cu and Zn?

1. Bronze
2. Brass
3. Gun metal
4. Type metal

Q. how to calculate n factor of aluminium sulphate

Q. In gun barrel the steel used is

1. Fe – Mn
2. Fe – Cr
3. Fe – W
4. Ni – Mo

Q.

Ferrites are an alloy of iron.

1. True
2. False

Q. What are alloys? Give two examples.

Q. The composition of gun metal is:

1. Cu, Zn, Sn
2. Al, Mg, Mn, Cu
3. Cu, Ni, Fe
4. Cu, Sn, Fe

Q. Which of the following elements is alloyed with copper to form brass

1. Lead

2. Silver

3. Antimony
4. Zinc

Q. Gold crystallises in ccp structure.The total number of voids present in 197g of gold will be

Q. What is Raney nickel?

Q. Which of the following alloys does not contain copper?

1. Bronze
2. Brass
3. German silver
4. Misch metal

Q. Which of the following alloys does not contain copper?

1. Bronze
2. Brass
3. German silver
4. Misch metal

Q. What is Randy nickel?

Q.

Alchemists were the first ones to learn the process of isolating ……….. and ……………

1. Zinc , Calcium

2. Phosphorus, Zinc

3. Phosphorus, Calcium

4. Silver , Gold

Q. Gold dissolves in aqua-regia forming:

1. Auric chloride
2. Aurous chloride
3. Chloroauric acid
4. Aurous nitrate

Q. Tin is used for making fusible alloys.

1. True
2. False

Q. an alloy of cu, au, ag is found to have cu constituting the ccp lattic if ag atom occupy edge centres and au present at body centres the alloy formale is ?

Q. An alloy is a material composed of two or more metals or a metal and a nonmetal.

1. true
2. false