क्वथन
(aangrezi:Boiling)- rasayan vijnan mean samany tap par vashpikaran ki kriya drav ki satah se hoti hai v dhimi hoti hai. yadi drav ka tap badhate jayean, to drav ke sampoorn ayatan se b de-b de bulabule nikalane lagate haian tatha drav tezise vashp mean parivartit hone lagata hai tatha ek sthiti ati hai, jab drav ka tap sthir ho jata hai tatha tab tak sthir rahata hai jab tak sampoorn drav vashpikrit nahian ho jata. is kriya ko hi drav ka 'kvathan' kahate haian tatha vah sthir tap jis par kvathan hota hai, kvathanaank kahalata hai.
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sanbandhit lekh
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varnamala kramanusar lekh khoj
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