Code No: 117EY Set No. 1 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD IV B.Tech. I Sem., I Mid-Term Examinations, September-2017 METALLURGICAL METALLURGICAL PROBLEMS Objective Exam Name: ______________________________ Hall Ticket No. Answer All Questions. All Questions Carry Equal Marks. Time: 20 Min. Marks: 10. I.
Choose the correct alternative:
1.
According to Sieverts Law if partial pressure of Nitrogen gas is doubled then its solubility is increased by [ ] a) 2 b) 1.414 c) d) both b and c
2.
For the reaction FeO + CO = Fe + CO2 ΔG = -7000 J/mole of CO at 900K, then reduction of Fe is [ ] a) Possible b) Not possible c) Equilibrium d) none
3.
According to Arrhenius equation the rate constant (K) is given by (-E/T) (-ER/T) (-ET) a) A e b) A e c) A e
4.
5.
6.
7.
8.
Activity of coefficient for ideal solutions a) γ = 1 b) γ = 0 Change in Gibbs free energy ΔG= a) ΔH+TΔS b) ΔH*TΔS Entropy of mixing for equi atomic solution at 0K a) 0 b) infinity
(-E/RT)
d) A e
c) γ= a/X
c) ΔHΔH-TΔS
c) R ln 0.5
c)mol/lit/sec
]
[
]
[
]
[
]
[
]
[ d) 16kg
]
[
]
d) none
d) R ln 2
Which of the following are correct units for entropy? -1 -1 a) Joule/mol b)cal/mol c) cal/deg mol Units of first order rate constant -1 a) lit/mol b) sec
[ d) infinity
d) cal/deg/mol
d)none
9.
_______ of oxygen occupies 22.4litres at standard conditions a) 32kg b) 32gm c) 16gm
10.
Which of the following is mainly treated by hydrometallurgy a)Rich ores b)Lean ores c)Gangue d)None of these
Cont…..2
Code No:117EY
:2:
Set No. 1
II
Fill in the Blanks
11.
On passing of 96,500 coulombs charge, how much substance will be deposited? __________
12.
The total cell voltage of an electrolytic cell is given by the formula
13.
Reaction voltage of a cell in terms of heat of reaction is given by the formula_____________
14.
1gram chemical equivalent weight is given by formula _____________
15.
In electro refining, the nature of electrode is _____________
16.
1 cubic meter of air weighs _________ at standard conditions
17.
Fourier’s law describes ____________ mode of heat transfer
18.
______________ used to prevent heat loses
19.
___________________ Property that determines the fraction of incident radiation reflected by a surface.
20.
How many modes of heat transfer are there ___________
-oOo-
_____________________ .
Code No: 117EY Set No. 2 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD IV B.Tech. I Sem., I Mid-Term Examinations, September-2017 METALLURGICAL PROBLEMS Objective Exam Name: ______________________________ Hall Ticket No. Answer All Questions. All Questions Carry Equal Marks. Time: 20 Min. Marks: 10. I.
Choose the correct alternative:
1.
Activity of coefficient for ideal solutions a) γ = 1 b) γ = 0
2.
3.
4.
5.
Change in Gibbs free energy ΔG= a) ΔH+TΔS b) ΔH*TΔS Entropy of mixing for equi atomic solution at 0K a) 0 b) infinity
c) γ= a/X
c) ΔH-TΔS
c) R ln 0.5
c)mol/lit/sec
]
[
]
[
]
[
]
[
]
[ d) 16kg
]
[
]
d) none
d) R ln 2
Which of the following are correct units for entropy? -1 -1 a) Joule/mol b)cal/mol c) cal/deg mol Units of first order rate constant -1 a) lit/mol b) sec
[ d) infinity
d) cal/deg/mol
d)none
6.
_______ of oxygen occupies 22.4litres at standard conditions a) 32kg b) 32gm c) 16gm
7.
Which of the following is mainly treated by hydrometallurgy a)Rich ores b)Lean ores c)Gangue d)None of these
8.
According to Sieverts Law if partial pressure of Nitrogen gas is doubled then its solubility is increased by [ ] a) 2 b) 1.414 c) d) both b and c
9.
For the reaction FeO + CO = Fe + CO2 ΔG = -7000 J/mole of CO at 900K, then reduction of Fe is [ ] a) Possible b) Not possible c) Equilibrium d) none
10.
According to Arrhenius equation the rate constant (K) is given by (-E/T) (-ER/T) (-ET) a) A e b) A e c) A e
(-E/RT)
d) A e
Cont…..2
Code No:117EY
:2:
Set No. 2
II
Fill in the Blanks
11.
1gram chemical equivalent weight is given by formula _____________
12.
In electro refining, the nature of electrode is _____________
13.
1 cubic meter of air weighs _________ at standard conditions
14.
Fourier’s law describes ____________ mode of heat transfer
15.
______________ used to prevent heat loses
16.
___________________ Property that determines the fraction of incident radiation reflected by a surface.
17.
How many modes of heat transfer are there ___________
18.
On passing of 96,500 coulombs charge, how much substance will be deposited? __________
19.
The total cell voltage of an electrolytic cell is given by the formula
20.
Reaction voltage of a cell in terms of heat of reaction is given by the formula_____________
-oOo-
_____________________ .
Code No: 117EY Set No. 3 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD IV B.Tech. I Sem., I Mid-Term Examinations, September-2017 METALLURGICAL PROBLEMS Objective Exam Name: ______________________________ Hall Ticket No. Answer All Questions. All Questions Carry Equal Marks. Time: 20 Min. Marks: 10. I.
Choose the correct alternative:
1.
Entropy of mixing for equi atomic solution at 0K a) 0 b) infinity
2.
3.
c) R ln 0.5
c)mol/lit/sec
]
[
]
[
]
[ d) 16kg
]
[
]
d) R ln 2
Which of the following are correct units for entropy? -1 -1 a) Joule/mol b)cal/mol c) cal/deg mol Units of first order rate constant -1 a) lit/mol b) sec
[
d) cal/deg/mol
d)none
4.
_______ of oxygen occupies 22.4litres at standard conditions a) 32kg b) 32gm c) 16gm
5.
Which of the following is mainly treated by hydrometallurgy a)Rich ores b)Lean ores c)Gangue d)None of these
6.
According to Sieverts Law if partial pressure of Nitrogen gas is doubled then its solubility is increased by [ ] a) 2 b) 1.414 c) d) both b and c
7.
For the reaction FeO + CO = Fe + CO2 ΔG = -7000 J/mole of CO at 900K, then reduction of Fe is [ ] a) Possible b) Not possible c) Equilibrium d) none
8.
According to Arrhenius equation the rate constant (K) is given by (-E/T) (-ER/T) (-ET) a) A e b) A e c) A e
9.
10.
Activity of coefficient for ideal solutions a) γ = 1 b) γ = 0 Change in Gibbs free energy ΔG= a) ΔH+TΔS b) ΔH*TΔS
c) γ= a/X
(-E/RT)
d) A e
[ d) infinity [
c) ΔH-TΔS
]
]
d) none
Cont…..2
Code No:117EY
:2:
Set No. 3
II
Fill in the Blanks
11.
1 cubic meter of air weighs _________ at standard conditions
12.
Fourier’s law describes ____________ mode of heat transfer
13.
______________ used to prevent heat loses
14.
___________________ Property that determines the fraction of incident radiation reflected by a surface.
15.
How many modes of heat transfer are there ___________
16.
On passing of 96,500 coulombs charge, how much substance will be deposited? __________
17.
The total cell voltage of an electrolytic cell is given by the formula
18.
Reaction voltage of a cell in terms of heat of reaction is given by the formula_____________
19.
1gram chemical equivalent weight is given by formula _____________
20.
In electro refining, the nature of electrode is _____________
-oOo-
_____________________ .
Code No: 117EY Set No. 4 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD IV B.Tech. I Sem., I Mid-Term Examinations, September-2017 METALLURGICAL PROBLEMS Objective Exam Name: ______________________________ Hall Ticket No. Answer All Questions. All Questions Carry Equal Marks. Time: 20 Min. Marks: 10. I.
Choose the correct alternative:
1.
Units of first order rate constant -1 a) lit/mol b) sec
c)mol/lit/sec
[
]
[ d) 16kg
]
[
]
d)none
2.
_______ of oxygen occupies 22.4litres at standard conditions a) 32kg b) 32gm c) 16gm
3.
Which of the following is mainly treated by hydrometallurgy a)Rich ores b)Lean ores c)Gangue d)None of these
4.
According to Sieverts Law if partial pressure of Nitrogen gas is doubled then its solubility is increased by [ ] a) 2 b) 1.414 c) d) both b and c
5.
For the reaction FeO + CO = Fe + CO2 ΔG = -7000 J/mole of CO at 900K, then reduction of Fe is [ ] a) Possible b) Not possible c) Equilibrium d) none
6.
According to Arrhenius equation the rate constant (K) is given by (-E/T) (-ER/T) (-ET) a) A e b) A e c) A e
7.
8.
9.
10.
Activity of coefficient for ideal solutions a) γ = 1 b) γ = 0 Change in Gibbs free energy ΔG= a) ΔH+TΔS b) ΔH*TΔS Entropy of mixing for equi atomic solution at 0K a) 0 b) infinity
c) γ= a/X
c) ΔH-TΔS
c) R ln 0.5
Which of the following are correct units for entropy? -1 -1 a) Joule/mol b)cal/mol c) cal/deg mol
(-E/RT)
d) A e
[ d) infinity
]
[
]
[
]
[
]
d) none
d) R ln 2
d) cal/deg/mol
Cont…..2
Code No:117EY
:2:
Set No. 4
II
Fill in the Blanks
11.
______________ used to prevent heat loses
12.
___________________ Property that determines the fraction of incident radiation reflected by a surface.
13.
How many modes of heat transfer are there ___________
14.
On passing of 96,500 coulombs charge, how much substance will be deposited? __________
15.
The total cell voltage of an electrolytic cell is given by the formula
16.
Reaction voltage of a cell in terms of heat of reaction is given by the formula_____________
17.
1gram chemical equivalent weight is given by formula _____________
18.
In electro refining, the nature of electrode is _____________
19.
1 cubic meter of air weighs _________ at standard conditions
20.
Fourier’s law describes ____________ mode of heat transfer
-oOo-
_____________________ .
