Corrosion can be prevented by
1.alloying
2.tinning
3.galvanizing
4.all of the above
Posted Date:-2021-03-07 08:30:27
During roasting which of the following poisonous gas is mainly produced
1.CO
2.CO2
3.SO2
4.N2O
Posted Date:-2021-03-07 08:30:27
Elements which have properties of metals and nonmetals are
1.amorphous
2.crystalline
3.metalloids
4.metals
Posted Date:-2021-03-07 08:30:27
Which of the following non-metals is liquid at the room temperature?
1.iodine
2.bromine
3.carbon
4.sulphur
Posted Date:-2021-03-07 08:30:27
Galvanic cells are also named as
1.electrolytic cells
2.battery cells
3.daniel cells
4.john cells
Posted Date:-2021-03-07 08:30:27
Galvanization is a method to
1.protect the iron metal from corrosion
2.extract iron from its ore
3.protect food from rancidity
4.improve the ductility property of the metal
Posted Date:-2021-03-07 08:30:27
Which of the following methods is not used for the prevention of corrosion?
1.greasing
2.painting
3.plating
4.Heating
Posted Date:-2021-03-07 08:30:27
Rusting of iron could take place in
1.distilled water
2.ordinary water
3.distilled and ordinary water
4.none of the above
Posted Date:-2021-03-07 08:30:27
Voltaic cells generate electricity by
1.spontaneous redox reaction
2.non spontaneous redox reaction
3.sublimation reaction
4.thermochemical reaction
Posted Date:-2021-03-07 08:30:27
Widening of a river valley takes place due to
1.corrosion
2.lateral erosion
3.corrasion
4.hydraulic action
Posted Date:-2021-03-07 08:30:27