Class 12th

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V
Vishal Baghel

Contributor-Level 10

Reduction half reaction.

Cr? O? ²? + 14H? + 6e? → 2Cr? ³ + 7H? O

Oxidation half reaction

SO? ²? + H? O → SO? ²? + 2e? ] * 3

Oxygen is balanced by adding water and hydrogen is balanced by adding H? and the charge is balanced by electrons.

Add ( eq. (i) + (3 * eq. (ii) )

Cr? O? ²? + 3SO? ²? + 8H? → 2Cr? ³ + 3SO? ²? + 4H? O

a = 1 b = 3 c = 8

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Vishal Baghel

Contributor-Level 10

Keq. = ( [C] [D])/ ( [A] [B])

Keq = (10 * 6)/ (2 * 3) = 10

ΔG° = −2.303RTlog Keq. = −2.303 (2) (300) (log 10)

= −1381.8cal (? R = 2cal/molk)

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Vishal Baghel

Contributor-Level 10

Kindly go through the answer

ΔH = ΔU + Δn_gRT

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Vishal Baghel

Contributor-Level 10

Kindly go through the answers

? H =? U +? n_gRT

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Vishal Baghel

Contributor-Level 10

Veronal is a barbiturate drug and it constitutes an important class of tranquilizers.

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Vishal Baghel

Contributor-Level 10

Chloroprene is the monomer of neoprene.

2-chlorobuta-1,3-diene (chloroprene)

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Vishal Baghel

Contributor-Level 10

CH? CONH? - (i) LiAlH? , (ii) H? O? )-> CH? NH?

CH? CONH? - (Br? /KOH)-> CH? NH?

CH? CN - (i) LiAlH? , (ii) H? O? )-> CH? NH?

CH? NC - (i) LiAlH? , (ii) H? O)-> CH? NHCH?

Methyl isocyanide gives a secondary amine, CH? NHCH? upon reduction.

 

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Vishal Baghel

Contributor-Level 10

Ketones are reduced into hydrocarbons using Zn – Hg/HCl (Clemmenson reduction).

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Vishal Baghel

Contributor-Level 10

Allylic halide have halogen bonded to sp³ carbon which is adjacent to > C = C <

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