General Principles and Processes of Isolation of Elements  MCQs

MCQs of General Principles and Processes of Isolation of Elements

Showing 101 to 110 out of 154 Questions
8 9 10 11 12 13
101.
For which metal is mond carbonyl method of refining is used ?
(a) Ni
(b) Si
(c) Fe
(d) Al
Answer:

Option (a)

102.
Which one is used as adorsbent in chromatography ?
(a) SiO2
(b) Al2O3
(c) MnO2
(d) NH4Cl
Answer:

Option (b)

103.
Which reaction occurs on cathode in Hall-Haroult process ?
(a) All3+ +3e-→All
(b) Cs +O-2→COg+2e-
(c) Cs +2O-2→CO2g+4e-
(d) Al +e-→3All
Answer:

Option (a)

104.
The blister copper is _____ % pure.
(a) 100 %
(b) 59 %
(c) 95 %
(d) 5 %
Answer:

Option (c)

105.
Which impurities are present in blister copper ?
(a) Sulphur
(b) Iron
(c) (A) and (B)
(d) Phosphorus
Answer:

Option (c)

106.
Which one is the alloy of copper ?
(a) Brass
(b) Steel
(c) Nitinol
(d) all
Answer:

Option (a)

107.
Which one of the iron is used to obtain iron ?
(a) Haematite
(b) Siderite
(c) Magnetite
(d) Iron pyride
Answer:

Option (a)

108.
Which substance is mixed with porous mixture obtained by roasting of haematite ?
(a) Silica
(b) Limestone
(c) Coal
(d) Turpentine
Answer:

Option (b)

109.
Which one is the use of steel containing chromium ?
(a) Automobiles
(b) Cycles
(c) Vessels
(d) Cutting and grinding machines
Answer:

Option (d)

110.
Zinc is known as _____ on commercial basis.
(a) spelter
(b) ore
(c) pig
(d) mud
Answer:

Option (a)

Showing 101 to 110 out of 154 Questions
8 9 10 11 12 13