IIT-JEE 1992 | Some Basic Concepts of Chemistry Question 37 | Chemistry

IIT-JEE 1992

MCQ (Single Correct Answer)

-0.25

For the redox reaction:
$$MnO_4^ - + {C_2}O_4^{ - 2} + {H^ + }$$ $$ \to M{n^{2 + }} + C{O_2} + {H_2}O$$
The correct coefficients of the reactants for the balanced reaction are

$$MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,16$$

$$MnO_4^ - \,\, \to \,\,16,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,2$$

$$MnO_4^ - \,\, \to \,\,5,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,2$$

$$MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,5$$

IIT-JEE 1991

MCQ (Single Correct Answer)

-0.25

The oxidation state of the most electronegative element in the products of the reaction. BaO₂ with dil. H₂SO₄ are

0 and -1

-1 and -2

-2 and 0

-2 and -1

IIT-JEE 1991

MCQ (Single Correct Answer)

-0.5

Read the following statement and explanation and answer as per the options given below:

STATEMENT (S): In the titration of Na₂CO₃ with HCl using methyl orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator.

EXPLANATION (E): Two moles of HCl are required for the complete neutralization of one mole of Na₂CO₃

Both S and E are true, and E is the correct explanation of S.

Both S and E are true, and E is not the correct explanation of S.

S is true but E is false

S is false but E is true

IIT-JEE 1990

MCQ (Single Correct Answer)

-0.25

The oxidation number of phosphorus in Ba(H₂PO₂) is :

-1

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