CBSE
KMnO4 reacts with ferrous sulphate according to the following equation,
Mn + 5Fe2+ + 8H- Mn2+ + 2Fe3+ + 4H2O
Here, 10 mL of 0.1M KMnO4 is equivalent to
50 mL of 0.1 M FesO4
20 mL of 0.1 M FesO4
40 mL of 0.1 M FesO4
30 mL of 0.1 M FeSO4
For the reaction,
NH3 + OCl- N2H4 + Cl-
occurring in basic medium, the coefficient of N2H4 in the balanced equation will be
1
2
3
4
Point out the correct statement.
Below 710C, C is better reducing agent than CO
Below 710°C, CO is better reducing agent than C
Below 710C, CO is an oxidising agent
Below 710C, CO, is a reducing agent
In an oxidation-reduction reaction, MnO ion is converted to Mn2+. What is the number of equivalents of KMnO4 (mol. wt.= 158) present in 250 mL of 0.04 M KMnO4 solution ?
0.02
0.05
0.04
0.07
Oxidation state of oxygen in F2O is
+1
-1
+2
-2
Which of the following is wrong statement?
Ni(CO)4 has oxidation number +4 for Ni
Ni(CO)4 has zero oxidation number for Ni
Ni is metal
CO is gas
In acidic medium, dichromatic ion oxidises ferrous ion to ferric ion. If the gram molecular weight of potassium dichromate is 294 g its gram equivalent weight (in grams) is
24.5
49
125
250
Which of the following species do not show disproportionation on reaction?
ClO-, Cl , Cl and Cl
Cl
Cl
ClO-
None of these
The maximum oxidation state exhibited by actinide ions is
+5
+4
+7
+8
Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenyl amine as indicator. The number of moles of Mohr's Salt required per mole of dichromate is:
3
4
5
6