IIT-JEE 2002 Screening | Some Basic Concepts of Chemistry Question 21 | Chemistry

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IIT-JEE 2002 Screening

MCQ (Single Correct Answer)

-0.5

How many moles of electron weigh one kilogram?

$$6.023 \times {10^{23}}$$

$${1 \over {9.108}} \times {10^{31}}$$

$${{6.023} \over {9.108}} \times {10^{54}}$$

$${1 \over {9.108 \times 6.023}} \times {10^8}$$

IIT-JEE 2001 Screening

MCQ (Single Correct Answer)

-0.5

An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250ml. the volume of 0.1N NaOH required to completely neutralize 10ml of this solution is :

40ml

20ml

10ml

4ml

IIT-JEE 2001 Screening

MCQ (Single Correct Answer)

-0.5

In the standardization of Na₂S₂O₃ using K₂Cr₂O₇ by iodometry, the equivalent weight of K₂Cr₂O₇ is:

(molecular weight)/2

(molecular weight)/6

(molecular weight)/3

Same as molecular weight

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

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