Dear Student,

These two reactions are neutralisation reactions. Acid is being neutralised by base and energy is released in the process. In 1st reaction, HCl is neutralised with NaOH. Here HCl has one H+, so one mole of NaOH is being used. In 2nd reaction, H2SO4 has two H+, so it requires two moles of NaOH to be neutralised. Heat of neutralisation of H2SO4 should be twice that of neutralisation of HCl, because 2 H+ are being neutralised.
So, y = 2x
x = y/2
Correct option is 3.


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