In an electrolytic set-up to protect iron from corrosion,...
In an electrolytic set-up to protect iron from corrosion, the iron is?
made cathode
made anode
used with a metal of lower electropositive potential
initially coated with tin
Correct answer is A
In cathodic protection,iron object is made cathode by connecting it with reactive elements like magnesium,zinc.
A substance is said to be hygroscopic when it ...
The arrangement above can be used for the collection of ...
Which of the following pairs of properties of alkali metals decreases down the group? ...
What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O? [Al = 27, S = 32, H = 1, O = 16]...
What is the change in the oxidation number of phosphorus in the following reaction? 4P(s) + 5O2(a...
The octane number of zero is assigned to ...
In which of the following is the oxidation number of sulphur equal to -2? ...
Which of the following is a primary constituent of crude oil? ...