1
IIT-JEE 1997
Subjective
+5
-0
To a 25ml H2O2 solution, excess of acidified solution of potassium iodide was added. The iodine liberated required 20 ml of 0.3 N sodium thiosulphate solution. Calculate the volume strength of H2O2 solution.
2
IIT-JEE 1997
Subjective
+3
-0
Element A burns in nitrogen to give an ionic compound B. Compound B reacts with water to give C and D. A solution of C becomes 'milky' on bubbling carbon dioxide. Identify A, B, C and D.
3
IIT-JEE 1997
Subjective
+1
-0
Give reactions for the oxidation of hydrogen peroxide with potassium permanganate in acidic medium.
4
IIT-JEE 1997
Subjective
+1
-0
Arrange the following sulphates of Alkaline earth metals in order of decreasing thermal stability : BeSO4, MgSO4, CaSO4, SrSO4
Questions Asked from s-Block Elements (Subjective)
Number in Brackets after Paper Indicates No. of Questions
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