In s-block,on moving down the group,the react | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The reactivity of $s-$block metals with water and air depends primarily on their ability to lose electrons,which is determined by their ionization

Vedclass · Accepted Answer

On moving down the group,the melting point decreases.

Vedclass · Answer

(B) The reactivity of $s-$block metals with water and air depends primarily on their ability to lose electrons,which is determined by their ionization enthalpy. As we move down the group,the atomic size increases and the ionization enthalpy decreases,making it easier for the metal to lose electrons and thus increasing its reactivity. Option $A$ (atomic size) is significant as it directly influences ionization enthalpy. Option $B$ (melting point) is a physical property related to metallic bonding strength and does not dictate the chemical reactivity trend with water or air. Option $C$ (electron gain enthalpy) is generally not the primary factor for $s-$block metals,as they are electropositive and tend to lose electrons rather than gain them. However,since the question asks for the factor with 'no significance' for the reactivity trend,and both $B$ and $C$ are not directly responsible for the increase in chemical reactivity,but $C$ is often cited in periodic trends,$B$ is the most distinct physical property unrelated to the chemical reactivity mechanism.

In $s-$block,on moving down the group,the reactivity of metals with water and air increases. Which of the following factors has no significance for this trend of reactivity?

Similar Questions

In the periodic table,metallic character of the elements shows one of the following trends:

Which of the following substances will liberate bromine when reacted with a solution of potassium bromide?

Among the following,the least and most metallic elements will be respectively:
$(I) [He] 2s^1$
$(II) [Kr] 5s^2 4d^{10} 5p^5$
$(III) [Xe] 6s^1$
$(IV) [He] 2s^2 2p^5$

$Fe$ is placed in the eighth group of the periodic table. What is the number of electrons in its outermost orbit?

The decreasing order of basic character of $K_2O$, $BaO$, $CaO$ and $MgO$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module