Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines ?
In a dry cell (battery), which of the following are used as electrolytes ?
Consider the following statements: Cook is one of the materials of the charge added to blast furnace for the production of steel / iron. Its function is to
Of these statements
I. act as the reducing agent
II. remove silica associated with the iron ore
III. function as fuel ; to supply heat
IV. act as an oxidizing agent
An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
Which are the materials generally employed as solder in soldering operations in electronics ?
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