Please wait...

Chemistry Test 104
Menu grid icon
Result Result point icon
Chemistry Test 104
  • Goals icon

    /

    Score
  • Trophy icon

    -

    Rank
White alarm icon Time Taken: -
Result frame illustration
  • Question 1/10
    4 / -1

    Which of the following has highest coagulating power to coagulate a ferric hydroxide [Fe(OH)3] sol ?

    Solutions

    Fe(OH)3 = +ve  sol
    So effective ion is –ve = [Fe(CN)6]–3
    higher –ve power among the following option.

     

  • Question 2/10
    4 / -1

    Which of the following is incorrect statement

  • Question 3/10
    4 / -1

    For the coagulation of 50ml of ferric hydroxide sol. 10ml of 0.5 M KCl is required. What is the coagulation value of KCl ?

    Solutions

    50 ml of Fe(OH)3 required → 5 m. mole of KCl  so 1000 ml (1L solution) of Fe(OH)3 required →

    so coagulation value of KCl = 100

     

  • Question 4/10
    4 / -1

    A sample of ammonium phosphate, (NH4)3PO4, contains 6 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is :

  • Question 5/10
    4 / -1

    A compound contains 69.5% oxygen and 30.5% nitrogen and its molecular weight is 92. The molecular formula of the compound is :-

    Solutions

     

  • Question 6/10
    4 / -1

    What volume of CO2 at STP is obtained by thermal decomposition of 20 g KHCO3 ?

    [Atomic weight of K = 39]

    2KHCO3(s) → K2O(s) + 2CO2(g) + H2O(g)

  • Question 7/10
    4 / -1

    50 g of CaCO3 is allowed to react with 73.5 g of H3PO4. The moles of Ca3(PO4)2 formed in the process is :

    Solutions

    3CaCO3 + 2H3PO4 → CO3(PO4)2 + 3CO2 + 3H2O

    = 1/2 = 0.74
    = 0.5
    CaCO3 is L.R.
    From 3 mole CaCO3, 1 mole Ca3(PO4)2 is formed
    From 1/2 mole CaCO3 ; = 1/3 mole Ca3(PO4)2 is formed

     

  • Question 8/10
    4 / -1

    According to following reaction :

    A + BO3 → A3O4 + B2O3

    The number of moles of A3O4 produced if 1 mole of A is mixed with 1 mole of BO3.

  • Question 9/10
    4 / -1

    One mole of ideal gas expands isothermally to ten times its original volume. The change in entropy is:-

  • Question 10/10
    4 / -1

    What will be the work done when one mole of a gas expands reversible isothermally from 15 L to 50 L at 25°C?

    Solutions

     

Close button icon
User Profile
-

Correct (-)

Wrong (-)

Skipped (-)

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Mockers logo Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Arrow pointer icon
Click on Allow to receive notifications
Notification bell icon ×
Open Now