MCQ
What is correct acidic strength order of following compounds ?
- A

- B

- ✓

- D






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$1.$ The structure of compound ${P}$ is
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$2.$ The structure of the compound ${Q}$ is
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Give the answer question $1,2$ and $3.$
Assertion $(A)$ : The first ionization enthalpy of $3 d$ series elements is more than that of group $2$ metals
Reason $(R)$ : In $3d$ series of elements successive filling of d-orbitals takes place.
In the light of the above statements, choose the correct answer from the options given below :