Main 9 · Advanced 16
Balancing redox reactions
- Main 2026ChemistryInteger
500 mL of 0.2 M solution in basic medium when mixed with 500 mL of 1.5 M KI solution, oxidises iodide ions to liberate molecular iodine. This liberated iodine is then titrated with a standard M thiosulphate solution in presence of starch till the end point. If 300 mL of thiosulphate was consumed, then the value of is ________.
- Advanced 2025ChemistrySingle correct
One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is
- Advanced 2024ChemistryMultiple correct
An aqueous solution of hydrazine () is electrochemically oxidized by , thereby releasing chemical energy in the form of electrical energy. One of the products generated from the electrochemical reaction is .
Choose the correct statement(s) about the above process
- Advanced 2024ChemistryNumerical
The number of moles of potassium iodide required to produce two moles of P is _____.
- Advanced 2023ChemistryInteger
(5 moles) reacts completely with acidified aqueous potassium permanganate solution. In this reaction, the number of moles of water produced is , and the number of moles of electrons involved is . The value of is _____.
- Main 2022ChemistrySingle correct
Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium ?
- Main 2022ChemistrySingle correct
The reaction of with potassium permanganate in acidic medium leads to the formation of mainly :
- Main 2022ChemistrySingle correct
In neutral or alkaline solution, oxidises thiosulphate to :
- Main 2021ChemistryInteger
The reaction of sulphur in alkaline medium is given below :
The values of 'a' is _______. (Integer answer)
- Advanced 2020ChemistryInteger
In the chemical reaction between stoichiometric quantities of and KI in weakly basic solution, what is the number of moles of released for 4 moles of consumed?
- Advanced 2019ChemistryMultiple correct
Fusion of with KOH in presence of produces a salt W. Alkaline solution of W upon electrolytic oxidation yields another salt X. The manganese containing ions present in W and X, respectively, are Y and Z. Correct statement(s) is(are)
- Advanced 2019ChemistryNumerical
The amount of water produced (in g) in the oxidation of 1 mole of rhombic sulphur by conc. to a compound with the highest oxidation state of sulphur is ______
(Given data: Molar mass of water = 18 g mol⁻¹)
- Advanced 2016ChemistryInteger
In neutral or faintly alkaline solution, 8 moles of permanganate anion quantitatively oxidize thiosulphate anions to produce X moles of a sulphur containing product. The magnitude of X is
- Main 2016ChemistrySingle correct
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :
- Advanced 2015ChemistryMultiple correct
is reduced to by using
- Advanced 2015ChemistryInteger
In dilute aqueous , the complex diaquodioxalatoferrate(II) is oxidized by . For this reaction, the ratio of the rate of change of to the rate of change of is
- Advanced 2014ChemistryMultiple correct
For the reaction:
The correct statement(s) in the balanced equation is/are: - Main 2014ChemistrySingle correct
The equation which is balanced and represents the correct product(s) is :
- Main 2014ChemistrySingle correct
Which of the following is not formed when reacts with acidic solution ?
- Main 2014ChemistrySingle correct
How many electrons are involved in the following redox reaction ?