1

IIT-JEE 1990

Subjective

+5

-0

A mixture of H

_{2}C_{2}O_{4}(oxalic acid) and NaHC_{2}O_{4}weighing 2.02 g was dissolved in water and solution made upto one litre. Ten millilitres of the solution required 3.0 ml. of 0.1 N sodium hydroxide solution for complete neutralization. In another experiment, 10.0 ml. of the same solution, in hot dilute sulphuric acid medium. require 4.0 ml. of 0.1 N potassium permanganate solution for complete reaction. Calculate the amount of H_{2}C_{2}O_{4}and NaHC_{2}O_{4}in the mixture.2

IIT-JEE 1990

Subjective

+4

-0

A solid mixture (5.0 g) consisting of lead nitrate and sodium nitrate was headed below 600

^{o}C until the weight of the residue was constant. If the loss in weight 28.0 percent, find the amount of lead nitrate and sodium nitrate in the mixture.3

IIT-JEE 1990

Subjective

+1

-0

Calculate the molality of 1 litre solution of 93% H

_{2}SO_{4}(weight/volume). The density of the solution is 1.84 g/ml4

IIT-JEE 1989

Subjective

+5

-0

An equal volume of a reducing agent is titrated separately with 1M KMnO

_{4}in acid neutral and alkaline media. The volumes of KMnO_{4}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 K_{2}Cr_{2}O_{7}consumed; if the same volume of the reducing agent is titrated in acid medium.Questions Asked from Some Basic Concepts of Chemistry (Subjective)

Number in Brackets after Paper Indicates No. of Questions

IIT-JEE 2003 (1)
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