HARD
Earn 100

Ferrous sulphate (FeSO4.7H2O) is known as

50% studentsanswered this correctly

Important Questions on The d- and f-Block Elements

MEDIUM
Consider the following reactions (unbalanced)
Zn+Hot conc. H2SO4G+R+X
Zn+conc. NaOHT+Q
G+H2S+NH4OHZa precipitate+X+Y
Choose the correct option(s).
MEDIUM
Fusion of MnO2 with KOH in presence of O2 produces a salt W. Alkaline solution of W upon electrolytic oxidation yields another salt X. The manganese containing ions present in W and X, respectively, are Y and Z. Correct statement(s) is (are)
MEDIUM
The manganate and permanganate ions are tetrahedral, due to:
MEDIUM
When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is
MEDIUM
MnO2 when fused with KOH and oxidized in air gives a dark green compound X. In acidic solution, X undergoes disproportionation to give an intense purple compound Y and MnO2. The compounds X and Y, respectively, are
EASY
The ionic charges of manganate and permanganate ion are respectively
EASY
The number of water molecules not coordinated to copper ion directly in CuSO4·5H2O, is
EASY
Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium
MEDIUM
Aqueous solution of metallic nitrate X reacts with NH4OH to form Y which dissolves in excess NH4OH. The resulting complex is reduced by acetaldehyde to deposit the metal. X and Y respectively, are
EASY
In alkaline medium, the reaction of hydrogen peroxide with potassium permanganate produces a compound in which the oxidation state of Mn is
MEDIUM
A metal A on heating in nitrogen gas gives compound B. B on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a dark blue-violet coloured solution. A and B respectively, are:
MEDIUM
When XO2 is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO3; a dark green product is formed which disproportionate in acidic solution to afford a dark purple solution. X is:
MEDIUM
Thermal decomposition of a Mn compound X at 513 K results in compound Y, MnO2 and a gaseous product. MnO2 reacts with NaCl and concentrated H2SO4 to give a pungent gasZ . X, Y and Z, respectively, are:
MEDIUM
Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is
EASY
An aqueous solution consists of Pb2+ and Cu2+ ions. Which of the following reagents is suitable for separating them?
MEDIUM
The colour of KMnO4 is due to: [where M metal, L ligand]