EASY
JEE Advanced
IMPORTANT
Earn 100

With reference to aqua regia, choose the correct option(s).
(a)Reaction of gold with aqua regia produces in the absence of air
(b)Aqua regia is prepared by mixing conc. and conc. in ratio
(c)Reaction of gold with aqua regia produces an anion having in oxidation state
(d)The yellow colour of is due to the presence of and

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Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)
HARD
JEE Advanced
IMPORTANT
Extraction of copper from copper pyrite involves

HARD
JEE Advanced
IMPORTANT
The carbon-based reduction method is NOT used for the extraction of

MEDIUM
JEE Advanced
IMPORTANT
The correct statement related to the metal extraction processes is(are)

EASY
JEE Advanced
IMPORTANT
Calamine, malachite, magnetite and cryolite, respectively are:

HARD
JEE Advanced
IMPORTANT
Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is (are)

HARD
JEE Advanced
IMPORTANT
Upon heating with , the reagent(s) that give copper metal is/are

EASY
JEE Advanced
IMPORTANT
Sulphide ores are common for the metals:
