If both gases are at the same temperature, which one has the greater pressure?
gas 1 because the particles are moving much faster
gas 1 because it has fewer particles that are close together
gas 2 because it has more particles that are colliding
gas 2 because the particles have more space between them

If both the gases are at the same temperature then they are moving at the same speed.

And one of the gas will have greater pressure if it has more molecules that are colliding as it will produce more pressure.

Hence the right option is:

gas 2 because it has more particles that are colliding.

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.