Answer the question on the basis of Figure

Choose the correct option of temperature at which carbon reduces FeO to iron and produces CO.

1.  Below temperature at point A.

2.  Approximately at the temperature corresponding to point A.

3.  Above temperature at point A but below the temperature at point D.

4.  Above temperature at point A.

Match the items of Column I with items of Column II and assign the correct code:

         Column I            Column II

(A) Pendulum         (1) Chrome steel

(B) Malachite          (2) Nickel steel

(C) Calamine          (3) ${\mathrm{Na}}_3{\mathrm{AlF}}_6$

(D) Cryolite            (4) ${\mathrm{CuCO}}_3.\mathrm{Cu} {\left(\mathrm{OH}\right)}_2$

                             (5) ${\mathrm{ZnCO}}_3$

1.  A (1)  B (2)  C (3)  D (4)

2.  A (2)  B (4)  C (5)  D (3)

3.  A (2)  B (3)  C (4)  D (5)

4.  A (4)  B (5)  C (3)  D (2)

Match the items of Column I with the items of Column II and assign the correct
code :

1. A =(1); B=(2); C=(4); D=(5)

2. A=(4); B=(3); C=(1); D=(2)

3. A=(3); B=(4); C=(2); D=(1)

4. A=(5); B=(4); C=(3); D=(2)

Match the items of Column I with the items of Column II and assign the correct code :

     Column I             Column II

(A) Sapphire           (1) ${\mathrm{Al}}_2{\mathrm{O}}_3$
(B) Sphalerite         (2) NaCN
(C) Depressant       (3) Co
(D) Corundum        (4) ZnS
                             (5) ${\mathrm{Fe}}_2{\mathrm{O}}_3$

1.  A (3)  B (4)  C (2)  D (1)

2.  A (5)  B (4)  C (3)  D (2)

3.  A (2)  B (3)  C (4)  D (5)

4.  A (1)  B (2)  C (3)  D (4)

Match the items of Column I with items of Column II and assign the correct
code :

Which of the following is not a mineral of aluminium?

Serpek’s method involves the heating of bauxite with

1. NaOH

2. Na₂CO₃

3. N₂ +C

4. CaCO₃

In the metallurgy of copper, the slag is

1. FeSiO₃

2. CaCO₃

3. CaSiO₃

4. CaO

Galena contains ZnS with PbS. Which of the following is used as depressant to stop ZnS to come with foam?

1. NaCN

2. Aniline

3. Pine Oil

4. H₂O

In Ellingham diagrams of ${∆}_{\mathrm{r}}\mathrm{G}$ oxide formation ${\mathrm{V}}_{\mathrm{s}}\mathrm{T}$, which of the following graphs has negative slope?

1. C $\to$ CO

2. Fe $\to$ Fe₂O₃

3. Mg $\to$ MgO

4. All of the above