Which of the following statements are not correct? A. The electron gain enthalpy of F is more negative than that of Cl . B. Ionization enthalpy decreases in a group of periodic table. C. The electronegativity of an atom depends upon the atoms bonded to it. D. Al 2 O 3 and NO are examples of amphoteric oxides. Choose the most appropriate answer from the options given below:

Step-by-step solution

A is incorrect. F and Cl belong to the same group of the periodic table. The electron gain enthalpy usually becomes less negative on moving down a group. However, in this case, the value of the electron gain enthalpy of Cl is more negative than that of F . This is because the atomic size of F is smaller than that of Cl . B is correct (ionisation energy decreases down the group). C is incorrect (Electronegativity is a fixed property of an element and is typically measured on scales such as the Pauling scale or the M