Chemical Bonding Archives - Page 3 Of 8

State which of the following are oxidation reactions and which are reduction reactions.
(a) (i) Cu ⟶ Cu2+ + 2e-
(ii) Cu2+ + 2e- ⟶ Cu
(iii) Sn4+ + 2e- ⟶ Sn2+
(iv) 2Cl- ⟶ Cl2 + 2e-
(v) Fe2+ ⟶ Fe3+ + 1e-
(vi) X + 2e- ⟶ X2-
(vii) Y – 1e- ⟶ Y1+
(viii) Z3+ + 1e- ⟶ Z2+
(b) (i) Zn ⟶ Zn2+
(ii) S ⟶ S2-
(iii) Sn2+ ⟶ Sn
(iv) Fe2+ ⟶ Fe3+

(i) Cu ⟶ Cu2+ + 2e- Oxidation Reaction (ii) Cu2+ + 2e- ⟶ Cu Reduction Reaction (iii) Sn4+ + 2e- ⟶ Sn2+ Reduction Reaction (iv) 2Cl- ⟶ Cl2 + 2e- Oxidation Reaction (v) Fe2+ ⟶ Fe3+ + 1e- Oxidation…

Explain the terms ‘oxidation’ and reduction’ with reference to an atom or ion.

Oxidation — It is the process when an atom or ion loses one or more electrons i.e, X - 1e- ⟶ X1+ For example, Na - 1e- ⟶ Na1+ Zn - 2e- ⟶ Zn2+…

State three differences between ‘X’ and ‘X1+’ i.e. an atom and an ion.

Differences between 'X' and 'X1+ are : Atoms – 'X' Ions – 'X1+' Electrically neutral particles Electrically charged particles [cations, anions] May or may not exist independently Exist independently in solution…

What is meant by the term ‘electrovalency’. State why Na [at. no. 11] has a electropositive valency of +1 and Cl (at. no. 17) an electronegative valency of -1.

The number of electrons that an atom of an element loses or gains to form a electrovalent bond is called it's electrovalency. The electronic configuration of Na (at. no. 11)…

Define the terms:
(i) Electrovalent or ionic bond
(ii) Electrovalent or ionic compound.

lectrovalent or Ionic Bond: A chemical bond formed between two atoms by the transfer of one or more electrons from a metallic (electropositive) element to a non-metallic (electronegative) element. Electrovalent…

State the type of compounds formed by transfer of valence electrons from one atom to another, and explain the method of formation of the same. State the role of ‘cations’ and ‘anions’ in their formation.

The compounds formed by the transfer of valence electrons from one atom to another are called Ionic or Electrovalent compounds. These compounds form when a metallic atom with 1, 2,…

State the reasons for chemical bonding between two atoms and the methods involved for achieving the same. State how ‘duplet and octet’ rules are involved for an atom to achieve stable electronic configuration.

The reasons for chemical bonding between two atoms is the tendency of elements to acquire the nearest noble gas configuration in their outermost orbit and become stable. There are three…

State why noble gases are unreactive while atoms of elements other than noble gases are chemically reactive.

Noble gases are unreactive because they have stable electronic configuration i.e., their outer most shell is complete and are stable hence they do not react. On the other hand elements…

What is meant by the term ‘chemical bond’ and ‘chemical bonding’.

Chemical bond — The linkage or force which acts between two or more atoms to hold them together as a stable molecule is called a chemical bond. Chemical bonding — It is…

Draw the geometrical atomic structure representing the electronic configuration of atoms of elements of :
1. Period-2
(i) group 14 [IVA] — carbon [at no. 6]
(ii) group 15 [VA] — nitrogen [at. no. 7]
(iii) group 16 [VI A] — oxygen [at no. 8]
2. Period-3
(i) group 1[IA] — sodium [at no. 11]
(ii) group 2[IIA] — magnesium [at. no. 12]
(iii) group 17[VIIA]— chlorine [at. no. 17]
3. Period-4
group 2[IIA] — calcium [at. no. 20].

Period-2 (i) Group 14 [IV A] — Carbon[at no. 6] (ii) Group 15 [VA] — Nitrogen [at. no. 7] (iii) Group 16 [VI A] — Oxygen [at no. 8] Period-3…

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