Chemistry
Identify the following reactions as either oxidation or reduction:
(i) O + 2e- ⟶ O2-
(ii) K - e- ⟶ K+
(iii) Fe3+ + e- ⟶ Fe2+
(iv) Zn ⟶ Zn2+ + 2e-
Related Questions
Assertion (A): The valency of an element is its combining capacity with an atom of another element.
Reason (R): Elements take part in chemical combination to acquire the electronic configuration of the nearest noble gas.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Match the atomic numbers 4, 8, 10, 15 and 19 with each of the following:
(a) Element which can form trivalent ion.
(b) An element with 4 shells.
(c) Element with 6 valence electrons.
(d) Element which does not form an ion.
Give the terms for the following definitions:
(a) A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
(b) A bond formed by transfer of electron(s).
Name or state the following.
(a) An element having valency zero.
(b) Metal with valency one.
(c) Atoms of the same element differing in mass numbers.
(d) Elements having same mass number but different atomic number.
(e) Bond formed by transfer of electrons(s)
(f) Ion formed by gain of electron(s)