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प्रश्न
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
विकल्प
Right
Wrong
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उत्तर
In the electrolytic method, a layer of highly active metal is applied to a less active metal- Wrong
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संबंधित प्रश्न
Define the Ore.
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Why does a new aluminium vessel lose shine so soon after use?
Which metal is extracted from bauxite ore?
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
How many valence electrons are present in metals ?
Name a non- metal that has a metallic luster and sublimes on heating.
State three objectives achieved during the roasting of ores.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Explain concept with example/explain with the help of a balanced equation.
Roasting
Explain concept with example/explain with the help of a balanced equation.
Calcination
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.
The poorest conductor of heat among metals is ____________.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
An alloy is
Care must be taken while diluting concentrated nitric acid with water. Why?
