Which one of the following is a buffer solution ?

Related Mcqs:

1. If a buffer solution of higher pH than seven is to be made we use___________________?

   A. Strong acid and strong base
   B. Weak acid and strong base
   C. Weak acid and strong base
   D. Weak acid and its salt with strong base

2. Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?

   A. 0.0002M HCI
   B. 0.2 mole of NaCI with 0.2 mole of HNO3
   C. 0.4 mole of CH3COOH with 0.4 mole of NaOH
   D. 0.4 mole of NH3 with 0.2 mole of HCI

3. When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?

   A. 0.115
   B. 0.900
   C. 0.015
   D. 0.215

   Submitted by: Muhammad Ali Kunbhar

4. Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH ?

   A. 0
   B. 1
   C. 2
   D. any one

5. 58.5g of of NaCl per 1 dm3 of solution of NaCl in water the concentration of solution will be___________________?

   A. 0.1 M
   B. 1 m
   C. 1 M
   D. 0.1 N

6. The main buffer system of the human blood is____________?

   A. H₂CO₃ – HCO₃
   B. H₂CO₃ – CO₃^2-
   C. CH₃COOH – CH₃COO^–
   D. NH₂CONH₂ – NH₂CONH⁺

   Submitted by: Muhammad Ali Kunbhar

7. Which of following metals can be displaced by all other metals from its solution ?

   A. Ag
   B. A
   C. Au
   D. Cu

8. If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?

   A. H2 is deposited at cathode
   B. Colour of the solution becomes fade
   C. Cu is deposited at anode
   D. All are possible

9. Which one of the following gives white precipitate with aqueous solution of BaCl2?

   A. NaHCO3
   B. NaNO3
   C. Na2CO3
   D. Na2CrO4

10. Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde

    A. CH₄
    B. C₂H₆
    C. C₂H₄
    D. C₂H₂

    Submitted by: Aamir khan Hullio