General Principles and Processes of Isolation of Elements  MCQs

MCQs of General Principles and Processes of Isolation of Elements

Showing 91 to 100 out of 154 Questions
7 8 9 10 11 12
91.
Which one is slag ?
(a) SiO2
(b) FeSiO3
(c) Cu2SiO3
(d) Fe2O3
Answer:

Option (b)

92.
Which one is used as reducing agent for metal oxide ?
(a) CO
(b) Ni
(c) LiAlH4
(d) CH3CH2OH
Answer:

Option (a)

93.
Reduction done by gaining electron is known as _____
(a) oxidation
(b) reducing agent
(c) electronation
(d) pyrolysis
Answer:

Option (c)

94.
ΔG°= -RT lnk, what is ΔG°?
(a) Free energy change
(b) Enthalpy change
(c) Standard free energy change
(d) Entropy change
Answer:

Option (c)

95.
If the equilibrium constant is zero than _____
(a) less product is obtained
(b) more product is obtained
(c) reactant and product are equal
(d) no change
Answer:

Option (c)

96.
ΔE°= -nFE°equation, what is E°?
(a) Electrons associated with reaction
(b) Standard reduction potential
(c) Free energy
(d) Value of faraday
Answer:

Option (b)

97.
Which substance are added to molten solid to bring its melting point down ?
(a) Slag
(b) Ore
(c) Flux
(d) Salt
Answer:

Option (c)

98.
Which one is not a purification method for impure metal ?
(a) Distillation
(b) Fusion
(c) Zone refining
(d) Electrolysis
Answer:

Option (b)

99.
For which metals is liquation method of refining used ?
(a) Sn
(b) Zn
(c) Hg
(d) Fe
Answer:

Option (a)

100.
For which metals, zone refining method is used ?
(a) Impure metal
(b) Semi metal
(c) Innert metal
(d) Heavy metal
Answer:

Option (b)

Showing 91 to 100 out of 154 Questions
7 8 9 10 11 12