12.14. Classify the following reactions in one of the reaction type studied in this unit.
(a) CH₃CH₂Br + HS^– → CH₃CH₂SH + Br^–
(b) (CH₃)₂C=CH₂ + HCl → (CH₃)₂ClC—CH₃
(c) CH₃CH₂Br + HO^– → CH₂=CH₂ + H₂O + Br^–
(d) (CH₃)₃C—CH₂OH + HBr → (CH₃)₂CBrCH₂CH₂CH₃ + H₂O

The standard enthalpy of combustion at 25°C of hydrogen, cyclohexene (C₆H₁₀) and cyclohexane (C₆H₁₂) are –241, –3800 and –3920 kJ mol–1 respectively. Calculate the standard enthalpy of hydrogenation of cyclohexene.

Kindly Consider following table–

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The total number of spectral lines formed when an electron jumps from n₇ → n₁ energy level.

How many faradays are required to reduce 0.1 mole of MnO⁻₄ to Mn+² ?

In the given reaction -