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

Related Mcqs:

1. When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?

   A. 2 moles of ethane
   B. 1 mole of ethane
   C. 2 moles of butane
   D. 1 mole of butane

2. 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

3. Which one of the following is a buffer solution ?

   A. brine
   B. blood
   C. glue
   D. solution of CuSO4

4. 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

5. When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?

   A. 0.5
   B. 1
   C. 1.5
   D. 2

6. How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?

   A. Two
   B. Three
   C. Four
   D. Six

7. NaOH is named as caustic soda because________________?

   A. It corrodes the organic tissues
   B. It is used in soda water
   C. It reacts with chlorine gas
   D. It reacts with fats to form soap

8. 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

9. 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

10. 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