Related Questions

The cuprous chloride used in orsat apparatus can absorb
A Only CO
B Both CO and CO2
C Both CO and O2
D All of the above
In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing
A CO
B CO2
C O2
D H2O
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
If 2 kg of metal, of which 1/3 is zinc and the rest is copper s, 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 13 : 42
B 19 : 43
C 15 : 42
D 17 : 43
নিম্নের কোন oxide টিকে উভধর্মী oxide বলে?
A CaO
B MgO
C ZnO
D CuO
Which metal oxide is an amphoteric oxide?
A iron
B aluminium
C sodium
D potassium
What is the valency of carbon?
A Pentavalent
B Divalent
C Trivalent
D Tetravalent
What is the valency of magnesium?
A 1
B 2
C 3
D 4
The efficiency of the copper oxide rectifier seldom exceeds
A 90 to 95%
B 85 to 90%
C 80 to 85%
D 65 to 75%
Copper oxide rectifier is usually designed not to operate above
A 10°C
B 20°C
C 30°C
D 45°C

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