Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
1. Distillation
2. Zone refining
3. Electrolysis
4. Chromatography

The maximum temperature that can be achieved in blast furnace is :

1. Upto 1900 K

2. Upto 5000 K

3. Upto 1200 K

4. Upto 2200 K

Consider the following graph.

 
At 1400 ^oC, the \(\Delta G_{r}^{o}\) the value for the reaction 
2FeO + 2C → 2Fe + CO is

1. -116 kJ mol^-1
2. -106 kJ mol^-1
3. 100 kJ mol^-1
4. -100 kJ mol^-1

Consider the Ellingham diagram given below.

The Y-axis, and X-axis in the graph are respectively:

1. Gibbs energy(\(\Delta G_{r}^{o} \)), and Pressure
2. Gibbs energy (\(\Delta G_{r}^{o} \)), and temperature
3. Enthalpy(\(\Delta H_{r}^{o} \)), and temperature
4. Temperature, and Gibbs energy  (\(\Delta H_{r}^{o} \)) 

The incorrect statement(s)among the following is/are:

Vapour phase refining process is used for refining :

1. Ni

2. Ti

3. Zr

4. All of the above

The thermodynamic property useful for selecting the reducing agent is:

1. Gibbs free energy change .

2. Internal energy change.

3. Specific heat capacity.

4. None of the above.

Incorrect statement(s) among the following options is/are:

The reaction that do not take place in the blast furnace during the extraction of iron is-

1. Fe₂O_3(s) + 3CO_(g) → 2Fe₃O_4(s) + 3CO_2(g)

2. FeO_(s) + CO_(g) → Fe_(s) + CO_2(g)

3. 2 C_(s) + O_2(g) → 2 CO_(g)

4. None of the above

The chemical reactions taking place in the extraction of zinc from zinc blende is

1. $2\mathrm{ZnS}+3{\mathrm{O}}_2\to 2\mathrm{ZnO} + 2{\mathrm{SO}}_2$

2. $\mathrm{ZnO} + \mathrm{C}\stackrel{1673 \mathrm{K}}{\to }\mathrm{Zn} + \mathrm{CO}$

3. Both 1 and 2

4. None of the above