What are the physical properties of ethyne ?

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Some important physical properties of ethyne (acetylene) are given below:

(i) Physical state and odour: Ethyne (acetylene) is a color less gas with ether-like odour when pure. Ethyne prepared from calcium carbide has garlic odour due to the presence of impurities like phosphine (PH₃) and hydrogen sulphide (H₂S).

(ii) Solubility: Ethyne is slightly soluble in water, business highly soluble in organic solvents like acetone and alcohol.

(iii) Density: Ethyne is lighter than air.

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(iv) Character: Ethyne is poisonous gas. Liquid ethyne (acetylene) is highly explosive.

(v) Boiling point: Ethyne (acetylene) boils atomic -84°C(189K).