Extraction of Iron

Q.

What is the iron obtained from the blast furnace called?

Q.

Describe the different steps involved in the extraction of iron from its haematite ore. Write the necessary chemical equations involved.

Q.

A liquid with high boiling point decomposes on simple distillation but it can be steam distilled for its purification. Explain how is it possible?

Q.

Name the content of Carbon in pig iron.

Q. 46. The molar heat capacities for the process shown in figure is 1. C=Cp 2. C=Cv 3. C>Cv 4. C=0

Q. 6. How many gram of CaO is obtained on heating 100g of CaCO3?

Q.

Which of the following is not obtained in the extraction of Iron?

1. Calcium silicate

2. Carbon monoxide

3. Ultrapure iron

4. Cast iron

Q. Δ cU^° of combustion of CH4(g) at certain temperature is-100kJ/mol. The value of △_cH^° is 1)equal to △_cU^° 2)<△_cU^° 3)>△_cU^° 4)zero

Q. Which of the following oxide is expected to react readily with NaOH ? 1)Na_2O 2)CaO 3)NO 4)Cl_2O_{

Q. Iron is extracted using a blast furnace. Select the correct options regrarding this process:

1. Iron formed in the furnace melts below its melting point becuase of the presence of the impurities
2. $C{O}_2$ formed by the combustion of C, reacts with excess coke in the furnace and produces CO
3. $F{e}_2{O}_3$ is reduced by $Al$ and produces molten iron
4. Limestone get decomposed to CaO which combines with the impurity $Si{O}_2$ from the ore

Q.

Chalk is:

1. CaCO₃

2. CaO

3. CaOCl₂

4. Ca(OH)₂

Q.

Define flux.

Q. The slag formed in the extraction of iron and copper respectively are

1. $CaSi{O}_3\text{and}Si{O}_3$
2. $FeSi{O}_3\text{and}CaSi{O}_3$
3. $MgSi{O}_3\text{and}FeSi{O}_3$
4. $CaSi{O}_3\text{and}FeSi{O}_3$

Q. Which of the following reactions represent the thermite reaction?

1. $3M{n}_3{O}_4+8Al\to 9Mn+4A{l}_2{O}_3$
2. $MgC{O}_3+Si{O}_2\to MgSi{O}_3+C{O}_2$
3. $C{u}_{2}S+2C{u}_{2}O\to 6Cu+S{O}_2$
4. $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$

Q. The magnitude of work done (in Kcal) when 650 gm of zinc is reacted with an excess of HCl (aq) in an open vessel at 300 K is
[R $=$ 2 cal.mol${}^{-1},$ At. mass of Zn $=$ 65]