Wolframite ore contains:
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Explanation
(b) Wolframite is FeWO4.
NEET Practice Questions (MCQs) with Answers & Solutions
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The process in which ore is heated in limited supply of air below its melting point is known as:
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Explanation
In Roasting ore is heated in free supply of air while in calcination the ore is heated in a limited supply of air in both cases below its metling point.
Iron is made inactive or passive by:
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Explanation
(b) Iron is made inactive or passive by oxidizing agents like conc.nitric acid, chromic acid, acidified KMnO4, etc., the cause of this is the formation of a thin film of oxide on the surface of the metal.
The inner lining of a blast furnace is made up of:
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Explanation
(C)
The main components of fire clay bricks are Silica and alumina. Oxides of calcium, ion titanium and potassium are also present in small amount in these bricks.
Froth floatation process for the concentration of ores is a practical application of:
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Explanation
(a) Gangue particles are wetted up by water and adsorbed.
Roasting is generally carried out in case of :
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Explanation
(b) To convert ores into oxides and remove sulphur as volatile SO2.
Which substance is used as basic refractory material in furnace?
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Explanation
(c) CaO is a basic flux.
Plumbo-solvency refers to:
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Explanation
(C) Lead dissolves in water containing dissolved air, due to the formation of lead hydroxide. This solvent action of water on lead is called plumbo solvency.
2Pb(s)+ O2(g) + 2H2O(l) -> 2 Pb(OH)2(s)
Rutile is an ore of:
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Explanation
(a) Rutile is TiO2.
Which is not a mineral?
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Explanation
(b) Peat is an early stage in the formation of coal from vegetable matter.
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