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WorksheetsElectrolysis and metallurgy
Total questions: 20
Worksheet time: 12mins
Out of the following ions which would get discharged first at the cathode
So4
Cu
Ag
OH
The colour of the aqueous solution of copper sulphate ________ when inert electrodes are used
Remians same
Fades away
Turns pinkish red
None of the following
The temperature of lead bromide needed for electrolysis is ___
390⁰c
420⁰c
380⁰c
480⁰c
The electrode of which material is required for electrolysis of acidified water
Copper
Carbon
Platinum
Nickle
Out of the following ions
OH- , SO4 , H+ , CU+
The product formed at anode is
Oxygen
Hrdroxyl molecule
Hydrogen gas
Copper metal
The current used in electroplating is
Dc
Ac
Mc st
None of the following
The electrolyte used during electroplating of silver
Sodium argento cyanide
Aqueous Sodium silverto
Sodium silver cyanide
NaAlO3
The dirt left behind while electrorefining is called
Metal impurity
Anode dust
Anode mud
Ore dirt
During electrolysis of Aqueous copper sulphate with active electrode the anode
Increases in size
Decreases in size
Remains the same size
None of the above
Dil. HCL is which type of electrolyte
Strong or weak
(a)
A metal which is in liquid state
Hg
Al
Ag
Cl
Which of the following metals do not show ductility
Zn
K
Al
Hg
Which of the following non metals show ductility
Carbon
Sulphate
Graphite
Carbon fibre
Which of this is a oxide of zinc
Zincite
Zincate
Calamine
Zinc blende
During baeyers process NAOH is added bauxite because it is
Impure
Amphoteric
Basic
Neutral
The product of aluminum in the electrolyte used in Hall heroults process except alumina
(a)
The impurities present in bauxite are
Iron[III] oxide
Iron[II] oxide
Sio2
None of the following
The process in which aluminum hydroxide is precipitated from sodium aluminate is called
Baeyers process
Aluminating
Seeding
Hydrolating
The alloy which contains cu(60-80%) and zn (40-20%)
Bronze
Duralumin
Brass
Solder
The reason for adding mg in magnalium is
To impart lightness
To impart shine
To impart strength
None of the following
