Which classification of the reaction shown below:
A. combination
B. combustion
C. single replacement
D. double replacement
Looking at the above chemical reaction, Al replaces H2 from sulfuric acid. This reaction is of single displacement type.
Therefore, the Correct Answer is C.
More Questions on TEAS 7
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Q #1: Which classification of the reaction shown below:
A. combination
B. combustion
C. single replacement
D. double replacement
Answer Explanation
Looking at the above chemical reaction, Al replaces H2 from sulfuric acid. This reaction is of single displacement type.
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Q #2: Which of the following gases is expected to be most soluble in water? Explain your reasoning.
A. CH4
B. CCl4
C. CHCl3
D. CO2
Answer Explanation
The solubility of of substances in water is determined whether the substance is polar or non-polar. Polar substances are more likely to dissolve in water while non-polar substances are insoluble in water. Looking at the choices of gases given, CH4, CCl4, and CO2 are non-polar gases, meaning they will not dissolve in water. However, CHCl3 is a polar gas, and it is most soluble in water among the choices given.
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Q #3: Which of the following properties of water explains its solvent abilities for certain substances?
A. Kinetic energy of liquid water molecules
B. High specific heat
C. High surface tension
D. Polarity of water molecules
Answer Explanation
: water is a polar molecule, which comprises of partial positive charge on 2 H toms and a partial negative charge on an oxygen atom. The law of solubility states that like dissolves like, meaning water dissolves polar substances and ionic compounds. The partial charges on water make it attracted to other polar molecules, which pulls apart atoms from other polar molecules resulting in the molecule dissolving in water.
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Q #4: In the following reactions, identify a decomposition type of chemical reaction a. b. c. d.
A. a
B. b
C. c
D. d
Answer Explanation
