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Which pair of compounds are isomers?
(1) NO2 and N2O4
(2) P2O5 and P4O10
(3) HCOOH and CH3COOH
(4) CH3OCH3 and C2H5OH

Sagot :

CH3OCH3 and C2H5OH are isomers. They have same molecular formula. But with another formation. 

Answer: [tex]CH_3OCH_3[/tex] and [tex]C_2H_5OH[/tex]

Explanation: The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.

[tex]CH_3OCH_3[/tex] and [tex]C_2H_5OH[/tex] are functional isomers which have same molecular formula but different functional groups attached.

(1) [tex]NO_2[/tex] and [tex]N_2O_4[/tex] are different compounds.

(2)  [tex]P_2O_5[/tex] and [tex]P_4O_{10}[/tex] are different compounds.

(3) [tex]HCOOH[/tex] and [tex]CH_3COOH[/tex] are different compounds.

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