logo

CuriousTab

CuriousTab

Discussion


Home General Knowledge Chemistry Comments

  • Question
  • What is the percentage of oxygen in Al2(SO4)3 ?


  • Options
  • A. 57.7%
  • B. 56.1%
  • C. 53.1%
  • D. 52.6%

  • Correct Answer
  • 56.1% 


  • Chemistry problems


    Search Results


    • 1. Metals reacts with acids to give:

    • Options
    • A. a salt and chlorine
    • B. a salt and hydrogen
    • C. a salt and water
    • D. a salt and base
    • Discuss
    • 2. Elements A, B and C occur as Dobereiners triads. If the atomic mass of A is 7 and that of C is 39, what will be the atomic mass of B?

    • Options
    • A. 20
    • B. 40
    • C. 23
    • D. 12
    • Discuss
    • 3. Who among the following laid the foundation of chemical sciences by establishing two important laws of chemical combination?

    • Options
    • A. Joseph L. Proust
    • B. Antoine L. Lavoisier
    • C. Ernest Rutherford
    • D. Democritus
    • Discuss
    • 4. Chlorine gas is used in the manufacture of:

    • Options
    • A. Baking powder
    • B. Bleaching powder
    • C. Baking soda
    • D. Washing soda
    • Discuss
    • 5. If the atomic number of Krypton is 36, then its electronic configuration is:

    • Options
    • A. 2,8,18,8
    • B. 2,8,20,6
    • C. 2,18,16
    • D. 2,18,8,8
    • Discuss
    • 6. ........... as is used as an illuminating gas.

    • Options
    • A. Methyl
    • B. Propane
    • C. Butene
    • D. Ethyne
    • Discuss
    • 7. ............. elements have the largest atoms

    • Options
    • A. F
    • B. O
    • C. H
    • D. Li
    • Discuss
    • 8. ....... is displaced when zinc is added to the solution of copper sulphate

    • Options
    • A. Copper
    • B. Hydrogen
    • C. Zinc
    • D. Sulphate
    • Discuss
    • 9. Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in

    • Options
    • A. Conduction
    • B. Convection
    • C. Radiation
    • D. Both conduction and convection
    • Discuss
    • 10. What is the number of groups and periods in the modern periodic table?

    • Options
    • A. 18, 7
    • B. 18, 8
    • C. 16, 7
    • D. 16, 8
    • Discuss


    Comments

    There are no comments.

Enter a new Comment