Question

answer of this Question

Answer 1

this is outer skin of Snake

Answer 2

REACTIONS

Swarts reaction and Finkelstein reactions are halogen exchange reactions that are associated with alkyl halides.

Swarts reaction: RX + MF → RF+ MX
where, RX represents alkyl chloride or alkyl bromide and MF represents metallic fluorides like AgF, Hg 2F2, CoF2 or SbF3

Finkelstein reaction is an SN2 reaction in which one halogen atom is replaced by another halogen atom. 
CH3CH2Cl (acetone) + NaI (acetone) → CH3CH2I (acetone) + NaCl (s)

In this reaction, ethyl chloride (a primary alkyl halide) is treated with sodium iodide (the nucleophile) to produce ethyl iodide. Acetone is used as the solvent because NaI (being polar) is soluble in acetone (non-polar) while NaCl is not soluble. Thus acetone helps in shifting the equilibrium towards the right as NaCl precipitates out of the reaction mixture. According to Le Chatelier's principle, when a decrease in the concentration of a product (Na Cl) by removing it from the equilibrium (as precipitate) results in consumption of more reactants to restore the product concentration. When the precipitate is continuously removed, the equilibrium also continuously shift, producing more quantity of product, until the total quantity of reactants is consumed.

...........The Wurtz reaction, named after Charles-Adolphe Wurtz, is a couplingreaction in organic chemistry, organometallic chemistry and recently inorganic main group polymers, whereby two alkyl halides are reactedwith sodium metal in dry ether solution to form a higher alkane: 2R–X + 2Na → R–R + 2Na+X.