A boat running downstream covers a distance of 12 km in 2 h while for covering the same distance upstream it takes 3 h. What is the speed of the boat in still water?

TLS Online TPP Program

#Question id: 356

#Unit 1. Molecules and their Interaction Relevant to Biology

How does 0.5 M sucrose (molecular mass 342) solution compare to 0.5 M glucose (molecular mass 180) solution?

TLS Online TPP Program

#Question id: 357

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the concentration of H+ in a solution of 0.1 M NaOH?

TLS Online TPP Program

#Question id: 358

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider the following reaction at equilibrium: CO2 + H2O ⇔ H2CO3. What would be the effect of adding additional H2O?

TLS Online TPP Program

#Question id: 359

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the concentration of OH− in a solution with an H+ concentration of 1.3 × 10^−4 M?

TLS Online TPP Program

#Question id: 360

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is considered to be a strong base (alkali)?

TLS Online TPP Program

#Question id: 361

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.