1
IIT-JEE 1990
Subjective
+1
-0
Calculate the molality of 1 litre solution of 93% H2SO4 (weight/volume). The density of the solution is 1.84 g/ml
2
IIT-JEE 1989
Subjective
+5
-0
An equal volume of a reducing agent is titrated separately with 1M KMnO4 in acid neutral and alkaline media. The volumes of KMnO4 required are 20 ml. in acid 33.4 ml. neutral and 100 ml in alkaline media. Find out the oxidation state of manganese in each reduction product. Give the balanced equations for all three half reactions. Find out the volume of 1M K2Cr2O7 consumed; if the same volume of the reducing agent is titrated in acid medium.
3
IIT-JEE 1988
Subjective
+2
-0
A sugar syrup of weight 214.2 g contains 34.2 g of sugar (C12H22O11). Calculate (i) molal concentration and (ii) mole fraction of sugar in the syrup
4
IIT-JEE 1988
Subjective
+3
-0
A sample of hydrazine sulphate (N2H6SO4) was dissolved in 100 ml. of water, 10 ml of this solution was reacted with excess of ferric chloride solution and warmed to complete the reaction. Ferrous ion formed was estimated and it required 20 ml of M/50 potassium permanganate solution. Estimate the amount of hydrazine sulphate in one litre of the solution.

Reaction:

4Fe3+ + N2H4 $$\to$$ N2 + 4Fe2+ + 4H+

$$MnO_4^-$$ + 4Fe2+ + 8H+ $$\to$$ Mn2+ + 5Fe3+ + 4H2O
EXAM MAP
Medical
NEET