NEET 2020 Physics and Chemistry

Given reaction, 2Cl(g)→Cl2(g)
We know that,
Cl(g)→Cl2(g)is endothermic reaction because it requires energy to break bond. So reverse reaction is exothermic ΔrH<0
Also, two gaseous atom combine together to form 1 gaseous molecule.
So, randomness ΔrS<0