Identify correct statements from the following :

A. Propanal and propanone are functional isomers.

B. Ethoxyethane and methoxypropane are metamers.

C. But-2-ene shows optical isomerism.

D. But-1-ene and but-2-ene are functional isomers.

E. Pentane and 2, 2-dimethyl propane are chain isomers.

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$$ \text { Identify A in the following reaction. } $$

14.0 g of calcium metal is allowed to react with excess HCl at 1.0 atm pressure and 273 K . Which of the following statements is incorrect?

[Given : Molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ of $\mathrm{Ca}-40, \mathrm{Cl}-35.5, \mathrm{H}-1$ ]

Which of the following represents the correct trend for the mentioned property?

A. F > P > S > B      - First Ionization Energy

B. Cl > F > S > P      - Electron Affinity

C. K > Al > Mg > B      - Metallic character

D. K₂O > Na₂O > MgO > Al₂O₃      - Basic character

Choose the correct answer from the options given below :