P Block Elements Group 13 Question 1
Question 1 - 24 January - Shift 2
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Beryllium has less negative value of reduction potential compared to the other alkaline earth metals.
Reason $\mathbf{R}$ : Beryllium has large hydration energy due to small size of $Be^{2+}$ but relatively large value of atomization enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.
(1) A is correct but $R$ is not correct
(2) Both A and R are correct and R is the correct explanation of $A$.
(3) $A$ is not correct but $R$ is correct
(4) Both A and R are correct and R is NOT the correct explanation of $A$.
Show Answer
Answer: (2)
Solution:
Formula: Reduction Potential
Be has less negative value compared to other AEM. However it’s reducing nature is due to large hydration energy associated with the small size of $Be^{2+}$ ion and relatively large value of the atomization enthalpy of metal.
