EASY
Earn 100

In the chemical change:
aN2H4+bBrO3-aN2+bBr-+6H2O, answer the following question:

What are the values of a and b in the reaction respectively:

aN2H4+bBrO3-3N2+2Br-+6H2O

50% studentsanswered this correctly

Important Questions on Redox Reactions

MEDIUM
For a reaction xNH3+yO2zNO+wH2O, if x=4 then y,z,w are respectively
MEDIUM
Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation?
HARD
2MnO4-+bC2O42-+cH+xMn2++yCO2+zH2O
If the above equation is balanced with integer coefficients, the value of c is _______ . (Round off to the Nearest Integer).
MEDIUM
KMnO4 oxidises oxalic acid in acidic medium. The number of CO2 molecules produced per mole of KMnO4 is
MEDIUM

What are the coefficients x, y, z, p, q, r and s, respectively, in the following balanced equation?

xHNO2(aq)+yKMnO4(aq)+zH2SO4(aq)pHNO3(aq)+q K2SO4(aq)+rMnSO4(aq)+sH2O(II)

MEDIUM
For the redox reaction MnO4-+C2O42-+H+Mn2++CO2+H2O, the correct coefficients of the reactants for the balanced reaction are respectively MnO4-,C2O42- and H+:
HARD

The reaction of sulphur in alkaline medium is given below:

S8s+a OHaqb Saq2+c S2O3aq2+d H2Ol

The values of 'a' is______ (Integer answer)

MEDIUM
For the reaction:

I-+ClO3-+H2SO4Cl-+HSO4-+I2 

The correct statement(s) in the balanced equation is/are:
MEDIUM

The coefficients x, y and z in the given redox reaction are respectively

xCr2O72-+ySO2+zH+Cr+3+SO42-+H2O

EASY
How many electrons are involved in oxidation of KMnO4 in basic medium ?
MEDIUM
Which of the following statement is not correct?
MEDIUM
Consider the following reaction:
x MnO4-+y C2O42-+zH+x Mn2++2y CO2+z2H2O 
The values of x, y and z in the reaction are, respectively:
EASY

In the balanced equation of the following reaction, the ratio of a/b is 

 aCaCO3+bH3PO4pCa3PO42+qCO2+rH2O

MEDIUM
Balance the following equation
xKMnO4+yK2C2O4+zH+pMn2++qCO2+rH2O
the correct values of x, y and z are
MEDIUM
For the redox reaction:

MnO4-+C2O42-+H+Mn2++CO2+H2O

What are the correct coefficients of the reactants for the balanced equation?
MEDIUM
The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____ .
EASY

What are x and y in the following reaction?

x Pb3O4yPbO+O2

HARD

For the redox reaction

xMnO4-+yH2C2O4+zH+mMn2++nCO2+pH2O

MEDIUM
The reaction, K2Cr2O7+m FeSO4+n H2SO4Cr2SO43+p Fe2SO43+K2SO4+q H2O when balanced, m, n, p, and q are, respectively:
EASY
The number of moles of KMnO4 required to oxidise one equivalent of KI in the presence of sulphuric acid is-