Redox Reactions (Part-1)

Definitions

100

Atoms get oxidized or reduced because their protons transfer from one atom to another. True or False?

False. Transfer of electrons

200

What is oxidation?

Loss of electron(s) by any species

300

What is reduction?

Gain of electron(s) by any species

400

What is an oxidation number? 

The charge that we assign to every atom in a compound. 

500

What is an oxidising agent in terms of oxidation number?

A reagent which can increase the oxidation number of an element in a given substance. These reagents are called as oxidants also.

Rules for the calculation of oxidation number.

100

In elements, in the free or the uncombined state, each atom bears an oxidation number of __________

zero

200

For ions composed of only one atom, the oxidation number is equal to the ____________

charge on the ion

300

The oxidation number of oxygen in most compounds is____ and in peroxides _____

-2 and -1

400

The oxidation number of hydrogen is +1, except ________

when it is bonded to metals in binary compounds/metal hydrides

500

In all its compounds, fluorine has an oxidation number of _____ 

-1

What is the oxidation number?

100

Oxygen in O₂?

Zero

200

 Mn in KMnO₄?

+7

300

Cl in ClO₃^-

+5

400

P in H₄P₂O₇?

-5

500

C in C₃O₂?

4/3

Determine who is being oxidized and who is being reduced

100

Who got oxidized? who got reduced? Na + Cl2 = NaCl

Na= oxidized Cl= reduced

200

Who got oxidized and who got reduced? F₂ + AlCl₃ --> AlF₃ + Cl₂

Cl=oxidized F= reduced

300

Who got reduced? Who got oxidized? Zn + CuCl2 = ZnCl2 + Cu

Zn= oxidized Cu= reduced

400

who got oxidized? who got reduced? AgBr + Mg --> MgBr₂ + Ag

Mg: oxidized Ag: reduced

500

Which element is being oxidized? Which element is being reduced? Cl_{2 +} AlF₃ --> AlCl₃ + F₂

Cl: reduced F: oxidized