1
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
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Oxidation states of Cr in K2Cr2O7 and CrO5 are respectively

A
+6, +5
B
+6, +10
C
+6, +6
D
None of these
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A given amount of Fe2+ is oxidised by x mol of $$MnO_4^ - $$ in acidic medium. The number of moles of $$C{r_2}O_7^{2 - }$$ required to oxidise the same amount of Fe2+ in acidic medium is
A
x
B
0.83 x
C
2.0 x
D
1.2 x
3
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
0.126 g of an acid is needed to completely neutralise 20 mL 0.1 (N) NaOH solution. The equivalent weight of the acid is
A
53
B
40
C
45
D
63
4
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
You are supplied with 500 mL each of 2N HCl and 5N HCl. What is the maximum volume of 3M HCl that you can prepare using only these two solutions?
A
250 mL
B
500 mL
C
750 mL
D
1000 mL
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