The ph of a cup of black coffee is 5 while the ph of glass of tomato juice is 4. comparing the ph of the two liquids, the tomato juice has [h+] than the coffee.(sience)

The black coffee, with a pH of 5 has a hydrogen ion concentration of 1 x 10^-5 mol/L. The tomato juice, with a pH of 4, has a hydrogen ion concentration of 1 x 10^-4 mol/L.  
By taking the difference between the two respective concentrations, we can compute how much greater the concentration of hydrogen ions in the tomato juice is compared to the coffee.  
Difference = (1 x 10^-4 mol/L) - (1 x 10^-5 mol/L) 
Difference = 9 x 10^-5 mol/L  
Thus, the tomato juice has a concentration of hydrogen ions that is 0.00009 mol/L greater than the the concentration of hydrogen ions in the black coffee.

Three alkali metals in group 1 are calcium, strontium, bariumboron, aluminum, galliumsodium, potassium, rubidiumfluorine, iodine, chlorine

The answer is overmatching