1. Which of the following gas is used in cigarette lighters?
MethaneEthaneButanePropane
ChloroformEthanolMethaneThioethanol
Avaialbility of d-orbitalsIts high electronegativitySmall size of fluorine atomStrong f-f bond
AmphibiansBirdsReptilesFishes
StapesTibiaFemurFibula
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