Which one of the following orders of acid strength is correct?

In HS^–, I^–, RNH₂ and NH₃, order of proton accepting tendency will be

The dissociation constant of monobasic acids A, B and Care 10^–4, 10^–6 and 10^–10 respectively. The concentration of each is 0.1 M. Which of the following has been arranged in order of increasing pH?

A physician wishes to prepare a buffer solution of pH = 3.58 that efficiently resists a change in pH yet contains only small concentrations of the buffering agents. Which one of the following weak acids together with its sodium salt would be the best to use ?

Highest pH (14) is given by

An amount of solid NH₄HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. Ammonium hydrogen sulphide decomposes to yield NH₃ and H₂S gases in the flask. When the decomposition reaction reaches equilibrium, the total pressure in the flask rises to 0.84 atm? The equilibrium constant for NH₄HS decomposition at this temperature is

For the reaction : 2NO₂(g) ⇌ 2NO(g) + O(g),(K_c= 1.8× 10^–6 at 184ºC and R = 0.0831 kJ/ mol. K)When K_p and K_c are compared at 184°C, it is found that