TMA 3 CHM303 INORGANIC CHEMISTRY
- All of the following are methods of beneficiation of ore except______?
- Gravity separation
- Gravity separation
- Froth flotation
- Mechanical process
The answer is D. Mechanical process
- Calculation, roasting and smelting are different steps involved in _____?
- Pyrometallurgy
- Pyrometallurgy
- Electrometallurgy
- Manometallurgy
The answer is A. Pyrometallurgy
- _______ is the process of heating concentrated ore in a limited supply of air to high temperature but below the fusion temperature
- Smelting
- Smelting
- Kroll’s process
- Thermal reduction of metals
The answer is Calcination
- Most lanthanides and actinides are ______?
- Pentavalent
- Pentavalent
- Hexavalent
- Trivalent
The answer is D. Trivalent
- The central atom or group of atoms co-ordination compounds act as______?
- Lewis acid
- Lewis acid
- Ligand
- A nucleophile
The answer is A. Lewis acid
- Free metals can be obtained from their compound by ______?
- Casseterite method
- Casseterite method
- Pyrometallurgy
- Selective reduction
The answer is C. Pyrometallurgy
- Liquation is a method of ________?
- Benefaction of ores
- Benefaction of ores
- Metallurgical process
- Reduction of metals
The answer is
- Liquid having two donors atoms are called_____?
- Bidendate ligand
- Bidendate ligand
- Polydendate ligand
- Homodendate ligand
The answer is A. Bidendate ligand
- Unwanted minerals (impurities) mind with ores are called______?
- Native mineral
- Native mineral
- Gangue
- Carnalite
- Pre-treatment of ores by cheaper methods based mainly on physical properties without altering the chemical properties of the ores is known as_____?
- Benefication of ores
- Benefication of ores
- Gangue
- Metallurgy
The answer is A. Beneficationof ores
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