Advertisements
Advertisements
प्रश्न
Name one metal each occurring as :
An oxide
Advertisements
उत्तर
Aluminum oxide (Al2O3)
APPEARS IN
संबंधित प्रश्न
What is aqua-regia?
Name any five metals which are purified by electrolytic refining method.
During the refining of an impure metal by electrolysis, the pure metal is a deposited ______.
Explain how the following metals are obtained from their compounds by the reduction process:
(i) Metal M which is in the middle of the reactivity series.
(ii) Metal N which is high up in the reactivity series.
Give one example of each type
Draw a neat labelled diagram.
Froth floatation method.
Draw a neat labelled diagram.
Hydraulic separation method.
Name one metal each occurring as :
A sulphine
Name one metal each occurring as :
A carbonate
Ionic compounds are electrically _______.
The lightest liquid metal is ____________.
Bauxite is mixed with cryolite so as to
(i) reduce its melting point
(ii) increase its electrical conductivity
(iii) molten cryolite acts as a solvent
(iv) increase its melting point
Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements.
- Mg and N2
- Li and O2
- Al and Cl2
- K and O2
Identify the terms for the following:
The electrode where reduction takes place.
A reddish-brown metal ‘X’, when heated in air, gives a black compound ‘Y’, which when heated in the presence of H2 gas gives ‘X’ back. ‘X’ is refined by the process of electrolysis; this refined form of ‘X’ is used in electrical wiring. Identify ‘X’ and ‘Y’. Draw a well-labelled diagram to represent the process of refining ‘X’.
Answer the following question with reference to the electrorefining of copper:
What is the anode made of?
Answer the following question with reference to the electrorefining of copper:
What do you observe at the cathode?
