Question

Which of the following statement is incorrect? 

(A) The tendency to attract bonded pair of electron in case of hybrid orbitals follow the order: \( sp > sp ^{2}> sp ^{3} \) 

(B) Alkali metals generally have negative value of electron gain enthalpy. 

(C) \( Cs ^{+}( g ) \) releases more energy upon gain of an electron than \( Cl ( g ) \). 

(D) The electronegativity values for \( 2 p \)-series elements is less than that for 3 p-series elements on account of small size and high inter electronic repulsions.

Answer 1

(D) The electronegativity values for 2p -series elements is less than that for 3p-series elements on account of small size and high inter electronic repulsions.

The electronegativity values for 2p-series elements is more than that for 3p-series elements. From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

Answer 2

(D) The electronegativity values for 2p-series elements is less than that for 3p-series elements on account of small size and high inter electronic repulsions.

The tendency of attract bonded pair of electron in case of hybrid orbitals increases with increase in %s. Character and so the order : sp > sp² > sp³

The electron affinity values for 2p-series elements is less that for 3p-series elements on account of small size and high inter electronic repulsions. statements (B) and (C) are facts. Every cation releases more energy than neutral atom upon gain of an electrons.