Efervescive or Effervescive: How To spell?
The word Efervescive is misspelled against Effervescive, an adjective meaning "Tending to produce effervescence."
Effervescive has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings E & ervescive which should not be misspelled with single 'F'
Wrong Spelling:  E-f-ervescive  Correct Spelling:  E-ff-ervescive 
Find more wrongly spelled words of Effervescive to spell it well.