The no. of protons in 1 mole of H2:

Explanation

The correct answer is 1.20 x 1024. A mole of any substance contains Avogadro's number (6.02 x 1023) of entities, in this case, H2 molecules. Since each H2 molecule consists of two hydrogen atoms, and each hydrogen atom has one proton, there are 2 protons per molecule. Therefore, the total number of protons in 1 mole of H2 is 2 x 6.02 x 1023, which equals 1.20 x 1024. Option A is incorrect because it represents the number of molecules, not protons. Option C is incorrect because it underestimates the number of protons, and Option D is incorrect because it overestimates the number of protons per molecule.