Among the species `CO_2, CO_3^(2-), CH_3COO^(-)`, CO, HCHO which has longest carbon-oxygen bond

Among the species CO_(2),CH_(3)COO',CO,CO_(3)^(2-)HCHO which has the veakest carbon-oxygen bond

Among the given species the one which contains weakest carbon - oxygen bond : CO_2,CH_3COO^(-),CO,CO_3^(2-)

Among the given species the one which contains weakest carbon - oxygen bond : CO_2,CH_3COO^(-),CO,CO_3^(2-)

Which of the following statements are correct ? (I) In ICl_(2), ClF_(3) and TeCl_(4) , the number of lone pair(s) of electrons on central atoms are 3,2 and 1 respectively. (II) Amongst CO,CO_(2),CO_(3)^(2-),CH_(3)OH the correct order from the weakest to the strongest carbon - oxygen bond -=CH_(3)OH lt CO_(3)^(2-) lt CO_(2) lt CO . (III) The hybridisation of boron in BF_(3) is the same which nitrogen has in ClNO molecule.

CH_(3)-CO-CO-CH_(2)CH_3

Why CO_(2) , molecule has zero dipole moment although carbon - oxygen bonds are polar.

The increasing order of basic strength of CI^(-), CO_(3)^(2-), CH_(3)COO^(-), OH^(-)and F^(-) is: