An aqueous solution of SO2 reacts with H2S to precipitate sulfur. Here SO2 acts as:
1. Catalyst
2. Reducing agent
3. Oxidising agent
4. Acid
In the reaction;
2Ag + 2H2SO4 Ag2SO4 + 2H2O + SO2, H2SO4 acts as:
1. Oxidizing agent
2. Reducing agent
3. Dehydrating agent
4. None of the above
In the following reaction, balancing coefficients X and Y are:
X HI + Y HNO3 NO + I2 + H2O
1. X=3, Y=2
2. X=2, Y=3
3. X=6, Y=2
4. X=6, Y=1
Which of the following is not an intramolecular redox reaction?
1. NH4NO2 N2 + 2H2O
2. 2Mn2O7 4MnO2 + 3O2
3. 2KClO3 2KCl + 3O2
4. 2H2O + O2
Which one is correct about CH2 = CCl2?
1. Both carbons are in +2 oxidation state.
2. Both carbons are in +1 oxidation state.
3. One carbon has +2 and other -2 oxidation states.
4. The average oxidation number of carbon is +1.
In the given reaction,
xBrO3- + yCr+3 + zH2O Br2 + CrO42- + H+
The coefficients x, y, and z are respectively-
1. 6, 10, 11
2. 6, 10, 20
3. 6, 8, 22
4. 6, 10, 22
Identify the substance acting as an oxidant in the following reaction:
BaCl2 + Na2SO4BaSO4 + 2NaCl
1. BaCl2
2. Na2SO4
3. NaCl
4. None of the these
The number of moles of ferrous oxalate oxidised by one mole of KMnO4 is
(1)
(2)
(3)
(4)
Which of the following equations is a balanced one
(1) 5BiO3-+ 22H+ + 2 → 5Bi3+ + 7H2O + 2MnO4–
(2)5BiO3- + 14H+ + 2 → 5Bi3+ + 7H2O + 2MnO4–
(3)2BiO3- + 4H+ + 2Mn2+ → 6Bi3+ + 2H2O + MnO4–
(4) 6BiO3-+ 12H+ + 2Mn2+ → 6Bi3+ + 6H2O + 2MnO4–
If 10 gm of V2O5 is dissolved in acid and is reduced to V2+ by zinc metal, how many moles of I2 could be reduced by the resulting solution if it is further oxidized to VO2+ ions?
[Assume no change in state of Zn2+ions] (V = 51, O =16, I = 127) :
1. | 0.11 mole of I2 | 2. | 0.22 mole of I2 |
3. | 0.055 mole of I2 | 4. | 0.44 mole of I2 |