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Dinesh khalmaniya 1![best-answer]() 
			
Since Chlorine is more electronagative than Florine, there is more inductive effect on carbon of CCl3(-) than in CF3(-) which stablises its negative charge. The negative charge on the carbon in CCl3(-) is further stablised in the vacant d-orbital of Chlorine which is not possible in case of CF3(-).
CCl3- ion is more stable than CF3- ion
fluorine is the most electronegative atom then cl....
yeah but here we will prefer resonance.