Take This 10th Grade Chemistry Quiz

10 Questions

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Take This 10th Grade Chemistry Quiz

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Questions and Answers
  • 1. 
    What is the relative formula mass of copper sulfate CuSO4?
    • A. 

      160 amu

    • B. 

      96 amu

    • C. 

      128 amu

    • D. 

      144 amu

  • 2. 
    What is the relative formula mass of MgF2?
    • A. 

      60 amu

    • B. 

      62 amu

    • C. 

      43 amu

    • D. 

      64 amu

  • 3. 
    Ammonium nitrate NH4NO3 is used as a fertiliser. What is the % mass of nitrogen in it?
    • A. 

      21%

    • B. 

      37%

    • C. 

      17.5%

    • D. 

      35%

  • 4. 
    A reaction that could theoretically produce 200g of product only produces 140g. What is its % yield?
    • A. 

      70%

    • B. 

      14.2%

    • C. 

      142%

    • D. 

      7%

  • 5. 
    A compound contains 13.5g of calcium, 10.8g of oxygen and 0.675g of hydrogen. What is its empirical formula?
    • A. 

      CaOH

    • B. 

      CaOH2

    • C. 

      CaO2H

    • D. 

      Ca(OH)2

  • 6. 
    If 9g of aluminium reacts with 35.5g of chlorine, what is the empirical formula of the compound formed?
    • A. 

      AlCl

    • B. 

      AlCl2

    • C. 

      AlCl3

    • D. 

      Al3Cl

  • 7. 
    Sodium hydroxide reacts with chlorine to make bleach as shown by this reaction. 2NaOH + Cl2 → NaOCl + NaCl + H2O. If we have a solution containing 100g of sodium hydroxide, how much chlorine gas should we pass through the solution to make bleach?
    • A. 

      28.65g

    • B. 

      82.45g

    • C. 

      88.75g

    • D. 

      86.57g

  • 8. 
    Calcium reacts with oxygen as shown by this reaction 2Ca + O2 → 2CaO. What mass of oxygen will react with 60g of calcium?
    • A. 

      12g

    • B. 

      24g

    • C. 

      6g

    • D. 

      14g

  • 9. 
    What is the % mass of hydrogen in methane CH4?
    • A. 

      20%

    • B. 

      25%

    • C. 

      75%

    • D. 

      12.5%

  • 10. 
    What % mass of magnesium oxide is magnesium?
    • A. 

      60%

    • B. 

      40%

    • C. 

      30%

    • D. 

      70%