Advertisements
Advertisements
प्रश्न
Name the metal which is extracted from haematite ore.
उत्तर
The metal extracted from hematite ore is iron. Hematite ore contains iron (III) oxide (Fe2O3). This iron oxide is extracted by heating it with aluminium. Aluminium acts as a reducing agent and reduces iron (III) oxide to iron
APPEARS IN
संबंधित प्रश्न
Why does a new aluminium vessel lose shine so soon after use?
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al2O3 + Fe
(b) MnO2 + Al
(c) Fe2O3 + Al
(d) Cu2O + Fe
Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium
Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg
(b) Hg and Mg
(c) Na and Mg
(d) Cu and Fe
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its:
(a) oxide
(b) hydride
(c) sulphide
(d) carbonate
Name the following:
The mixture of materials fed into a furnace to extract a metal.
Name a non- metal that has a metallic luster and sublimes on heating.
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
