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CHEMICAL REACTIONS MCQs

Total Questions : 24 | Page 2 of 3 pages
Question 11. Predict the following reaction NaCl + Ca(NO3)2 -->
  1.    no reaction both products are aqueous 
  2.    Calcium chloride and sodium nitrate are produced  
  3.    sodium nitrate is a solid formed 
  4.    calcium chloride is the solid formed
 Discuss Question
Answer: Option A. -> no reaction both products are aqueous 
Question 12. A chemical reaction that shows the formation of a solid and identifies the spectator ions
  1.    net ionic equation 
  2.    double replacement 
  3.    ionic equation 
  4.    dissociation 
 Discuss Question
Answer: Option C. -> ionic equation 
Question 13. Which reaction between halogens and halide salts will occur?
  1.    F2(g)  +  FeI2(aq) → FeF2(aq)  +  I2 (g)
  2.    Cl2(g) + SrF2(aq)  → SrCl2(aq)  +  F2(g)  
  3.    I2(g)  + MgBr2(aq)  → MnI2(aq)  + Br2(g)
  4.    Br2(l)  +  CoCl2(aq) → CoBr2(aq)  +  Cl2(g)
 Discuss Question
Answer: Option A. -> F2(g)  +  FeI2(aq) → FeF2(aq)  +  I2 (g)
Question 14. The word oxidation describes
  1.    gain of electrons
  2.    loss of electrons 
  3.    number of electrons remains the same
  4.    number of electrons transfered
 Discuss Question
Answer: Option B. -> loss of electrons 
Question 15. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
  1.    Coefficient
  2.    reactant
  3.    subscript
  4.    product 
 Discuss Question
Answer: Option A. -> Coefficient
Question 16. A metal is reacted with an acid to produce a salt and a hydrogen gas
  1.    neutralization 
  2.    double replacement 
  3.    single replacement 
  4.    synthesis 
 Discuss Question
Answer: Option C. -> single replacement 
Question 17. Describes the number of atoms in a compound of each element
  1.    coefficient 
  2.    superscript 
  3.    subscript 
  4.    SI unit 
 Discuss Question
Answer: Option C. -> subscript 
Question 18. Which statement is not a description of a chemical reaction?
  1.    A solid is dropped into a beaker of liquid and a gas is released.
  2.    Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
  3.    A solid is dropped into a beaker of liquid and an explosion occurs.
  4.    A liquid is heated in the sun and half of it evaporates.
 Discuss Question
Answer: Option D. -> A liquid is heated in the sun and half of it evaporates.
Question 19. Which half reaction shows the element being reduced
  1.    Na0   --> Na+1   +   1e-
  2.    Cl20  +  2e-  --> 2Cl-
  3.    Na0  +  1e- --> Na+1  
  4.    Cl20 --> 2Cl-  + 2e-
 Discuss Question
Answer: Option B. -> Cl20  +  2e-  --> 2Cl-
Question 20. What are the correct coefficients when this equation is balanced?KClO3 --> KCl + O2
  1.    2,2,2
  2.    2,2,3
  3.    1,2,3
  4.    3,3,3
 Discuss Question
Answer: Option B. -> 2,2,3

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