Question 1: Select the correct statement about the buffer solution

solutions which change in pH on dilution or with the addition of small amounts of acid or alkali
solutions which increase change in pH on dilution or with the addition of small amounts of acid or alkali
solutions which decrease change in pH on dilution or with the addition of small amounts of acid or alkali
solutions which resist change in pH on dilution or with the addition of small amounts of acid or alkali

Question 2: An acidic buffer solution is prepared by mixing

Weak acid and mixture of salt of weak acid and strong base
Weak acid and mixture of salt of weak acid and weak base
Weak acid and mixture of salt of strong acid and strong base
Weak acid and mixture of salt of strong acid and weak base

Question 3: Select the correct example of basic buffer

CH3COOH+ CH3COONa
NH4Cl
NH4OH+ NH4Cl
CH3COOH

Question 4: Select the correct expression of Henderson–Hasselbalch equation

pH=pKa+log([Salt]/[Acid])
pH=pKa-log([Salt][Acid])
pH=pKa x log([Salt][Acid])
pH=pKa+log([Salt][Acid])

Question 5: You are preparing a buffer solution using acetic acid (CH3COOH) and sodium acetate (CH3COONa). The pKa of acetic acid is 4.76. If you mix 0.1 M acetic acid with 0.15 M sodium acetate, what will be the pH of the resulting buffer solution?

4.936
4.567
2.567
3.89