Quiz  /  Chemical Reactions Class 9 MCQ Questions With Answers

  • 1. 
    Balance this equation._CF4 + _Br2 -- _CBr4 + _F2

  • 2,1,2,1
  • 1,2,2,1
  • 1,2,1,2
  • 2,2,2,2

  • 2. 
    One element loses an electron to another

  • Share Electrons
  • Transfer Electrons

  • 3. 
    How many Sodium (Na) are in 6NaCl?

  • 1
  • 12
  • 6

  • 4. 
    A chemical reaction that releases energy by light or heat

  • Endothermic Reaction
  • Exothermic Reaction
  • Diffusion
  • Fission

  • 5. 
    Is the following equation balanced?...Al + O2 --> 2Al2O3

  • Yes!
  • No!

  • 6. 
    How many Hydrogen are in 4H2O?

  • 6
  • 8
  • 2
  • 4

  • 7. 
    Balance this equation...HgO --> Hg + O2

  • It is balanced
  • 2HgO --> Hg + O2
  • 2HgO --> 2Hg + O2
  • I don't know...Oh well!

  • 8. 
    A substance formed when two or more elements are chemically bonded together

  • Element Soup
  • Pure Element
  • Ion
  • Compound

  • 9. 
    Tells us the number of atoms of each element in a compound

  • Coeffecient
  • Exponent
  • Chemical Formula
  • Calculator

  • 10. 
    Type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound

  • Double Displacement
  • Single Displacement
  • Synthesis
  • Decomposition

  • 11. 
    Bond in which one or more pairs of electrons are shared by two atoms

  • Covalent Bond
  • Ionic Bond
  • Reaction Bond
  • Null Bond

  • 12. 
    Type of reaction in which a compound is broken down into its simple elements

  • Double Displacement
  • Single Displacement
  • Synthesis
  • Decomposition

  • 13. 
    A substance that is formed as the result of a chemical reaction

  • Product
  • Reactant
  • Starters
  • Enders

  • 14. 
    The starting materials in a chemical reaction

  • Products
  • Reactants
  • Starters
  • Enders

  • 15. 
    Bond in which one or more electrons from one atom are removed and attached to another atom, resulting in positive and negative ions which attract each other

  • Covalent Bond
  • Ionic Bond
  • Reaction Bond
  • Null Bond

  • 16. 
    Both elements in a compound share a certain number of electrons

  • Share Electrons
  • Transfer Electrons

  • 17. 
    The symbolic representation of a chemical reaction

  • Long Hand
  • Short Hand
  • Electron Configuration
  • Chemical Equation

  • 18. 
    What is the right part of a chemical equation called...2H2 + O2 --> 2H2O

  • Reactants
  • Products
  • Yields
  • Chemical Equation

  • 19. 
    How many Aluminum are in Al2O3?

  • 3
  • 2
  • 5

  • 20. 
    What does the Law of Conservation of Mass state?

  • Matter cannot be gained or lost in a chemical reaction.
  • Matter can only be lost in a chemical reaction.
  • Matter can only be gained in a chemical reaction.
  • Matter can be gained and lost in a chemical reaction.

  • 21. 
    Type of reaction in which two or more elements combine to form a more complex compound

  • Double Displacement
  • Single Displacement
  • Synthesis
  • Decomposition

  • 22. 
    A process or reaction in which the system absorbs energy from its surroundings; usually, but not always, in the form of heat

  • Endothermic Reaction
  • Exothermic Reaction
  • Diffusion
  • Fission

  • 23. 
    An atom or molecule which has gained or lost one or more of its valence electrons

  • Covalent Bond
  • Chemical Formula
  • Ion
  • Compound

  • 24. 
    How many HCl molecules do you need to balance this equation? Mg + __HCl ---> MgCl2 + H2

  • 1
  • 2
  • 3
  • 4

  • 25. 
    What is the left part of a chemical equation called?2H2 + O2 --> 2H2O

  • Reactants
  • Products
  • Yields
  • Chemical Equation

  • 26. 
    Type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products

  • Double Displacement
  • Single Displacement
  • Synthesis
  • Decomposition
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