MCQ
Which of the following is isotopic number equal to that in $_{13}^{27}Al$ ?
- A$_3^7Li$
- B$_4^9Be$
- C$_5^{11}B$
- ✓All of these
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion ($A$): Enthalpy of neutralisation of strong monobasic acid with strong monoacidic base is always $-57 \mathrm{~kJ} \mathrm{~mol}^{-1}$
Reason ($R$): Enthalpy of neutralisation is the amount of heat liberated when one mole of $\mathrm{H}^{+}$ions furnished by acid combine with one mole of ${ }^{-} \mathrm{OH}$ ions furnished by base to form one mole of water. In the light of the above statements, choose the correct answer from the options given below.