Class 11th

BeCl? in solid state exist in a polymeric form & in a vapour state in exist in a dimeric form.

chain polymeric structure
Vapour state exist in a dimeric form

| H – F | H – Cl | H – Br | H – I |
| :- | :- | :- | :- |
| 1s – 2p | 1s – 3p | 1s – 4p | 1s – 5p |

Down the group size increases
Overlapping decreases
Acidic strength increases

Noble gases have weak dispersion forces so their melting and boiling point are very low.

(Pent-2-ene)

(Major product by Saytzeff's rule)

BeCl? is covalent and soluble in a organic solvent

For one mole of an ideal gas
C? – C? = R

Correct sequence of bond enthalpy of C – X bond is
CH? – F > CH? – Cl > CH? – Br > CH? – I

Aromatization is the procedure of converting an aliphatic compound into a non aromatic compound using a catalyst. This is usually done through the pathwya of techniques like dehydrogenation where a non aromatic compound is converted into an aromatic compound. Examples: converting cyclohexane to benzene, androgens to estrogens, etc. The final product always contains a benzene-like ring structure which follows Hückel's rule.

The maximum temperature that can be achieved in blast furnace is upto 2200 K .