1
IIT-JEE 2002 Screening
MCQ (Single Correct Answer)
+2
-0.5
How many moles of electron weigh one kilogram?
A
$$6.023 \times {10^{23}}$$
B
$${1 \over {9.108}} \times {10^{31}}$$
C
$${{6.023} \over {9.108}} \times {10^{54}}$$
D
$${1 \over {9.108 \times 6.023}} \times {10^8}$$
2
IIT-JEE 2001 Screening
MCQ (Single Correct Answer)
+2
-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 :
A
40ml
B
20ml
C
10ml
D
4ml
3
IIT-JEE 2001 Screening
MCQ (Single Correct Answer)
+2
-0.5
In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is:
A
(molecular weight)/2
B
(molecular weight)/6
C
(molecular weight)/3
D
Same as molecular weight
4
IIT-JEE 1991
MCQ (Single Correct Answer)
+1
-0.25
The oxidation state of the most electronegative element in the products of the reaction. BaO2 with dil. H2SO4 are
A
0 and -1
B
-1 and -2
C
-2 and 0
D
-2 and -1
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