Chemistry - PERIODIC TABLE Question with Solution | TestHub
Which of the following statements are not correct?
A. The electron gain enthalpy of is more negative than that of
B. Ionization enthalpy decreases in a group of periodic table.
C. The electronegativity of an atom depends upon the atoms bonded to it.
D. and are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below:
Options:
Answer:
Solution:
A is incorrect. and 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 is more negative than that of . This is because the atomic size of is smaller than that of .
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 is amphoteric oxide and is neutral oxide.
Hence, A, C and D are incorrect.