Metallurgy
Trending Questions
Why are all minerals are not ores but all ores are minerals?Give reason.
A ribbon of silvery-white element when heated in a flame burns with a dazzling white light and leaves a white powder. The white powder when dissolved in water turns red litmus blue. Answer the following:
Identify the element and the white powder obtained on its burning.
All ores are minerals whereas all minerals are not ores – True or False?
True
False
Which of the following statement(s) is/are correct?
All ores are minerals.
All minerals are ores.
Some ores are minerals.
Not all ores are minerals.
- Hydrogen
- Copper
- Magnesium
- Gold
Talcum powder has magnesium carbonate and zinc oxide.
- True
- False
Choose the correct sequence for extraction of metal from its ore.
i) Concentration of ore
ii) Reduction of metallic oxides
iii) Conversion of the ore into its oxide
iv) Refining of impure metal
- i→ii→iii→iv
- iv→i→iii→ii
- i→iii→ii→iv
- i→iii→iv→ii
State whether the following statements are “true” or “false”.
Red lead oxide on strong heating gives off oxygen gas.
- True
- False
Predict which of the formulae are not correct for the given compounds : Correct the wrong ones.
Silver oxide :
Concentrated metal ores are converted to their oxides for extracting metal from ore.
True
False
Haematite and magnetite are ores of:
aluminium
zinc
iron
magnesium
Metallurgy is a process of extracting:
metal from its mineral
gangue particles from its ore
pure metal from its ore
non metal from its ore
- gangue
- flux
- concentration
- metallurgy
- gold
- iron
- mercury
- calcium
- Single elements replace double elements
- Double elements replaces single elements
- Heat is evolved
- Heat is not evolved
Statement 1: Roasting involves oxidation of sulphide ores in the absence of air.
Statement 2: Calcination involves oxidation of carbonate ores in the absence
of air.
- Both statement 1 and statement 2 are correct.
- Neither statement 1 nor statement 2 is correct.
- Statement 1 is incorrect and statement 2 is correct.
- Statement 1 is correct and statement 2 is incorrect.
- All ores are minerals.
- All minerals are ores.
- Some ores are not minerals.
- Not all ores are minerals.
Ores mined from the earth are usually contaminated with large amounts of impurities also known as _______.
- gangue
- minerals
- alloys
- flux
- iron
- magnesium
- zinc
- aluminium
- Ore
- Gangue
- Slag
- Minerals
- Decomposition reaction
- Combustion
- Displacement reaction
- Combination reaction
- Bauxite
- China Clay
- Cryolite
- Feldspar
- Corundum
- Hematite
- Limonite
- Magnetite
(iii) Which of the following metals will displace metal 'M' from its solution ‘C’?
- Aluminium
- Gold
- Lead
- Silver
- Minerals
- Ores