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:

Question

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:

Aicharya · Accepted Answer

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 Mulliken scale.). D is incorrect. The oxides which behave as both acidic and basic oxides are called amphoteric oxides. . Here Al 2 O 3 is amphoteric oxide and NO is neutral oxide. Hence, A, C and D are incorrect.

Which of the following statements are not correct? A. The electron gain enthalpy of F is more negative than…

Solution