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प्रश्न
Mercury, silver, gold are highly reactive metals.
पर्याय
Right
Wrong
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उत्तर
Mercury, silver, gold are highly reactive metals- Wrong
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संबंधित प्रश्न
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Give the name and chemical formula of one ore of copper.
What iron compound is present in haematite ore? Also write its chemical formula.
Name the metal which is extracted from haematite ore.
Name the metal which is extracted from the ore called 'rock salt'.
A sulphide ore is converted into metal oxide by the process of:
(a) carbonation
(b) roasting
(c) calcination
(d) anodising
Give reasons, why aluminum is used in:
making alloys
Aluminum is used in thermite welding:
what is ignition mixture?
Aluminum is used in thermite welding:
write reaction for process?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
How many valence electrons are present in metals ?
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Identify who I am!
Ore of Aluminum- ______
Complete flow chart given below.
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
Explain in brief types of extraction of highly reactive metals according to their reactivity.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give the reason why the above reaction is known as a thermite reaction.
