S1: Be+2 has higher SRP than other alkaline earth metals.
S2: Be+2 has higher hydration energy and greater △aH (atomisation enthalpy) than other alkaline earth metals.
Both S1 & S2 are true
S1 is true ; S2 is false
S1 is false ; S2 is true
Both S1 & S2 are false
The correct option is(A): Both S1 & S2 are true.
Be has least –ve SRP value because of high △aH (atomisation enthalpy), inspite of maximum hydration energy.
The correct option is (A): Both S1 & S2 are true.
Method used for separation of mixture of products (B and C) obtained in the following reaction is: 

Two circular discs of radius \(10\) cm each are joined at their centres by a rod, as shown in the figure. The length of the rod is \(30\) cm and its mass is \(600\) g. The mass of each disc is also \(600\) g. If the applied torque between the two discs is \(43\times10^{-7}\) dyne·cm, then the angular acceleration of the system about the given axis \(AB\) is ________ rad s\(^{-2}\).
