CBSE Class 12 Chemistry Important Formulae

Concepts for anomalous properties / exceptions in chemistry

1) Ionisation Energy

2. Electronegativity

3. Electron gain enthalpy

4. Atomic / ionic radii

5. Oxidation Number

6. Bond dissociation enthalpy

7. Charge by Radius ratio

8. Lattice enthalpy

9. Hydration Enythalpy

10. Presence and absence of vacant d-orbital

11. Size – p-ᴨ - p-ᴨ and p-ᴨ - d-ᴨ overlapping

12. Fajan’s Rule (Covalent character)

13. Presence and absence Odd Electron

14. H-bond formation ability

15. Lewis – Base Character

16. Dipole moment / Polarity

17. Reducing and oxidizing ability - Electrode potential

18. Intermolecular force of attraction

19. Catenation property / ability to form allotrope

20. State of substance – solid / liquid / gas

21. Inert pair effect

22. Repulsive interaction

23. Exothermic and endothermic compound

24. 600 angular strain

26. Types of oxides – acidic, basic, amphoteric

27. Isostructural compounds

28. Monomeric / polymeric

29. State of hybridization.

30. Imperfect screening

31. Paramagnetic / diamagnetic

32. Multiple bond formation ability

33. Effective nuclear charge

15) Ca(OH)₂ +Cl₂ →
16) NaCl + MnO₂ + H₂SO₄ →
17) HgCl₂ + PH₃→
18) U + ClF₃ →
19) XeF₄ + H₂O →
20) XeF₆ + H₂O →
21) KMnO₄ + HCl →
22) KI (aq) + H₂O(l) + O₃ (g) →
23) CuSO₄ + NH₃ →
24) PCl₅ + H₂O(excess) →
25) (NH₄)₂Cr₂O₇ --(heat)→
26) P4 + NaOH +H₂O →
27) Al2O3 + NaOH + H₂O →
28) HCl + O₂ + CuCl₂(Catalyst)→
29) XeF₂ (s) + H₂O (l) →
30) NH₃ + Cl₂ (excess) →
31) Fe3+ + SO₂+ 2H₂O →
32) Br₂ + KI →
33) Cl₂ + H₂O →
34) NaOH + SO₂ →
35) SO₂ + MnO₄ˉ + H+ →
36) Fe + HCl →
37) Cl₂(g) + NaI(aq) →
38) Na₂S₂O₃ + I₂ →
39) Na₂S₂O₃ + Cl₂ + H₂O →
40) ClF + H₂O →
41) XeF₄ + O₂F₂ →
42) Cl₂ + NaOH (cold and dil.) →
43) NH₃ (excess) + Cl₂ →
44) SO₂+ V₂O₅ →
45) H₃PO₃ + Heat →
46) SF4 + H₂O →
47) Al₂O₃ + HCl + H₂O →
48) HNO₃ + P4O₁₀ →
49) NH₄NO₃ + Heat →
50) AgCl + NH₃ →
51) NaN₃ + Heat →
52) Ag + PCl₅ →
53) PCl₃ + H₂O →
54) Zn + dil. HNO₃ →

WORD ROOTS -prefix

1. Homo-- / Hetero :
2. Endo- / Exo-
3. Ultra-- / Infra –
4. Dextro- / Laevo –
5. Phobia- / Philic --- Lyophobic / lyophilic : Hydrohobic / hydrophilic
6. Pre- - Post –
7. Ante- / post : Penultimate / ante-penultimate
8. Mon- -/ bi- or di- / tri- / tetra- / penta -- Oligo - ………………… Poly- [ Monomer /polymer : monochromatic / polychromatic
9. Bis- tris- tetrakis
10.Inter- / Intra-
11.Hypo- / Hyper- : Hypotonic and hyper tonic solution
12.Primary- / secondary/ tertiary / Quaternary –
13.Super- / Sub : Supersonic , Subsonic
14.In- / Ex-
15. Singlet / duplet / triplet / quartet
16.Protic / aprotic solvent
17.Triads / Octaves
18.Entegegen - / Zusaman
19. Trans- / Cis –
20.Isomorphous / Polymorphous
21.Zeotrope / Azeotrope
22.Semi - / hemi- / demi –
23. Iso-- : Isotope / Isobar / Isoelectronic / Isotone / Isomer
24.Isotherm / Isobar / Isochore / Isotonic Solution / Isomorphous / isolobal
25.Isotropic / Anisotropic
26.Isomorphous / Polymorphous
27.Anomalous / Analogous
28.Intensive / Extensive : Intrinsic / Extrinsic
29.Dynamic / Static
30. Dehydration / Decarboxylation/Dehydrogenation

WORD ROOTS

Auto- self; tele- distance; Chroma – colour; Phone – sound; Algia = pain
Pyre- fire , heat
Photo- light Phobia – fearness, Phile – love towards, affinity towards
Metron-- measurement Stoichion - element Atomio – not divisible Oligo-fewPoly –many
Amphi , Ambi - both , on both side , around Halo- salt , Chalco-ore gene - born ,
form
1. Dent – tooth ,Chaeleo- crab Aroma - smell scribe – to write
2. Therm- Heat
3. Therapy – to cure
Antiseptic / Antibacterial / Anti allergic

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