NEET Chemistry Chemical Equilibrium MCQs

A solution is prepared by dissolving $0.01$ moles of $NH_4Cl$ and $0.1$ moles of $NH_3$ in $1$ L of water. If the $K_b$ for $NH_3$ is $1.8 imes 10^{-5}$, what is the approximate pH of the solution?

A buffer solution is prepared by mixing 20 mL of 0.1 M CH$_3$COOH and 30 mL of 0.2 M CH$_3$COONa. To this mixture, 1 mL of 1 M NaOH is added. The pH change of the buffer is closest to (pK$_a$ of CH$_3$COOH = 4.74):

Two buffer solutions A and B are prepared. A contains 0.1 M CH$_3$COOH and 0.1 M CH$_3$COONa. B contains 0.01 M CH$_3$COOH and 0.01 M CH$_3$COONa. Which solution has a higher buffer capacity?

A solution containing a weak acid HA and its conjugate base A$^-$ has a pH of 4.8. If the pK$_a$ of HA is 4.74, which of the following is TRUE?

Which of the following mixtures will NOT form an effective buffer solution?

100 mL of a buffer solution contains 0.1 M NH$_4$OH and 0.1 M NH$_4$Cl. If K$_b$ for NH$_4$OH is 1.8 x 10$^{-5}$, what is the pH change when 0.01 moles of HCl are added?

A buffer solution with pH 9 is to be prepared using NH$_4$OH (K$_b$= 1.8 x 10$^{-5}$) and NH$_4$Cl. What should be the ratio of [NH$_4$Cl]/[NH$_4$OH]?

Which of the following is an example of a buffer solution?

What is the purpose of a buffer solution?

Which component of a buffer solution neutralizes added acid?