EASY
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The zinc oxide formed after the process of calcination or roasting undergoes reduction to obtain or extract zinc.

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Important Questions on Metals and Non-metals

MEDIUM

2PbOs + Cs 2Pbs + 2CO2g

Which of the following statements are correct for the above chemical reaction?

(i) Lead is reduced.

(ii) Carbon di oxide is oxidised.

(iii) Carbon is oxidised.

(iv) Lead oxide is reduced

MEDIUM

2Al + 2Fe2O3Al2O3+2Fe

(Al=27u, Fe=56u, O=16u are the atomic masses)

How much of Iron, we can get if 54 kg of Aluminium is used?

MEDIUM
Metals towards the top of the activity series cannot be obtained from their compounds by reducing with carbon. Why? 
HARD

X+Y Z+SO2  X+ZCu+SO2 

Identify X, Y and Z:

HARD
Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
HARD

Choose the correct statements about the given chemical reaction: 

3MnO2(S) + 4Al(S)  3Mn(l) + 2Al2O3+ Heat.

a) Reaction is exothermic.

b) Al is acting as a reducing agent.

c)MnO2  is getting reduced.

d) Al is more reactive than Mn

HARD
Explain the steps involved in the extraction of metals from their ores.
HARD

Write short note on electrolytic refining of metals.

MEDIUM
What do you mean by the term metallurgy? 
EASY
How do we extract metals low in activity series from their ores?
MEDIUM
Name the process by which impure ore of aluminium gets purified by using concentrated solution of an alkali.
MEDIUM

Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.

EASY
Bauxite, an ore of aluminium, is purified by which process?
MEDIUM
Cinnabar is an ore of which of the following?
EASY
Write the name of the main ore of mercury metal.
HARD

In the given figure, the purification of copper in electric decomposition is shown. Label against 1,2,3,4 and 5

Question Image

EASY
What happens when Zinc Oxide is heated with carbon.(write only chemical equation)
MEDIUM
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.
EASY
Give the name and chemical formula of one ore of copper.