Arrange the following compounds in increasing order of their property as indicated, 1. CH3CHO, C6H5CHO, HCHO (reactivity towards nucleophilic addition reaction) 2. 2,4-dinitro benzoic acid, 4-methoxy benzoic acid, 4-nitrobenzoic acid (acidic character)

1. A nucleophilic addition reaction occurs when a chemical compound with an electron-deficient or electrophilic double or triple bond, a π bond, reacts with an electron-rich reactant, known as a nucleophile, resulting in the disappearance of the double bond and the formation of two new single, or σ. Therefore, C6H5CHO < CH3CHO < HCHO

2. The acidity of the oxide increases as the central atom becomes more electronegative. The electropositive character of elements increases from right to left across the periodic table and down the column. The resulting borderline between basic and acidic oxides runs diagonally.

4-methoxy benzoic acid < 4-nitrobenzoic acid < 2,4-dinitro benzoic acid