MEDIUM
Earn 100
Among the given carbonates/bicarbonates, find the value of
and
No. of compounds almost insoluble in water
No. of compound which liberate on reaction with
No. of compounds that undergo decomposition on heating to give respective carbonate
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Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)
EASY
Why are metallic ores converted into oxide usually?
HARD
Write the name and chemical formula of one ore of zinc,
Define: Quaternary ammonium salt.
MEDIUM
Explain the following:
Metallurgy
EASY
Oxidation state of copper is in
EASY
Write ores with formulae of the following metals: Iron
EASY
What are “minerals” and “ores” ? Differentiate between them.
EASY
Write the name and formula of the chief ore of Aluminium.
MEDIUM
Which one is not correctly matched?
MEDIUM
What is the role of silica in the metallurgy of copper?
MEDIUM
Define ore and minerals.
EASY
Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.
EASY
Which one is the ore of copper?
EASY
Write ores with formulae of the following metals: Aluminium
MEDIUM
Calamine is an ore of
EASY
Differentiate the following-
Ores and Minerals
MEDIUM
Give the reactions for the preparation of cast iron?
MEDIUM
Given below are two statements:
Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.
Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method.
Choose the most appropriate answer from the options given below :
MEDIUM
Which of the following is not an oxide ore?
MEDIUM
"Metals are usually not found as nitrates in their ores".
Out of the following two (a and b) reasons which is or are true for the above observation?
(a) Metal nitrates are highly unstable.
(b) Metal nitrates are highly soluble in water.
