MCQ
Which pair of atomic numbers represents $s$-block elements
- A$7, 15$
- B$6, 12$
- C$9, 17$
- ✓$3, 12$
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[Given : The standard enthalpy change for the reaction is $-165\, kJ\, mol ^{-1}$. The temperature in $K$ at which the reaction attains equilibrium is ... . (Nearest Integer)