1.

{:(LIST-1,LIST-2),("A) "N_2O,"1) "sp^2" and planar triangle"),("B) "HNO_2,"2) Nitrite and nitro form"),("C) "NO_3-,"3) "sp^3" and tetrahedron"),("D) "HNO_4,"4) Laughing gas"),(,"5) Peroxy bond"):}

Answer»

`{:(,A,B,C,D),("1)",1,2,3,4):}`
`{:(,A,B,C,D),("2)",3,2,4,1):}`
`{:(,A,B,C,D),("3)",2,5,3,4):}`
`{:(,A,B,C,D),("4)",4,2,1,5):}`

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