Asolar eclipse will last 1 to minutes. a) 3 b) 7 c) 15 d) 30 how many solar eclipses occur per year? a) 2 b) 4 c) 6 d) 8 is it safe to view a solar eclipse directly with your eyes? yes no only with sunglasses

1st qn - B
2nd qn - A 
3 is no

Yeah, but what are you trying to ask?

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m