Related Questions

Which of the following is an amphoteric oxide?
A Aluminium oxide
B Iron oxide
C Magnesium oxide
D Carbon dioxide
Which among the following metals provides amphoteric oxide ?
A Sodium
B Silver
C Aluminium
D Calcium
Which will form amphoteric oxide?
A Cu
B Ca
C Na
D Al
Which one of the following is an amphoteric oxide?
A CO2
B SO2
C Al2O3
D CuO
কোনটি উভধর্মী (amphoteric) যৌগ?
A H2O
B NH3
C H3O+
D HO-
নিম্নের কোন oxide টিকে উভধর্মী oxide বলে?
A CaO
B MgO
C ZnO
D CuO
Which metal does not undergo corrosion due to the formation of oxide layer?
A Copper
B Iron
C Aluminium
D Zinc
Oxide layer formed on the non-ferrous metal surface after its annealing is
A Removed by acid pickling
B Hammered into the surface
C Removed with coarse emery cloth
D Left as such to protect the surface
The formation of oxide film on a metal due to atmospheric exposure reduces its
A Toughness
B Stiffness
C Creep limit
D All of the above
If 2 kg of metal, of which 1/3 is zine and the rest is copper , be mixed with 3 kg of metal, of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A 17 : 43
B 13 : 42
C 19 : 43
D 15 : 42

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