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# Tenth Grade (Grade 10) Chemistry Questions

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Grade 10 Biochemical Pathways
Which of the following correctly summarizes cellular respiration?
1. $6 O_2 + C_6H_12O_6 = 6 CO_2 + 6 H_2O + "energy"$
2. $6 CO_2 + C_6H_12O_6 + "energy" = 6 CO_2 + 6 H_2O$
3. $6 CO_2 + 6 H_2O = 6 O_2 + C_6H_6O_6 + "energy"$
4. $6 CO_2 + 6 H_2O + "energy" = 6 O_2 + C_6H_12O_6$
Grade 10 Acids and Bases
Grade 10 Acids and Bases
Which of the following is NOT produced when magnesium hydroxide is dissolved in water?
1. $"H"^+$
2. $"Mg"^"2+"$
3. $"OH"^-$
4. None of the above
Grade 10 Acids and Bases
Which of the following substances, when dissolved in water, increases the concentration of hydrogen ions?
1. $"H"_2"SO"_3$
2. NaOH
3. $"H"_2"O"$
4. $"SO"_2$
Grade 10 Acids and Bases
Which of the following substances, when dissolved in water, increases the concentration of hydroxide ions?
1. $"H"_3"PO"_4$
2. NaOH
3. $"H"_2"O"$
4. $"CO"_2$
What type of reaction does the following equation represent?

$FeS + 2HCl rarr FeCl_2 + H_2S$
1. synthesis reaction
2. double-displacement reaction
3. single-displacement reaction
4. decomposition reaction
Grade 10 Acids and Bases
Which compound is an Arrhenius acid?
1. $"SO"_2$
2. $"CaO"$
3. $"H"_2"SO"_4$
4. NaOH
Large organic molecules are called                .
1. Polymers
2. Carbohydrates
3. Micromolecules
4. Macromolecules
Grade 10 Acids and Bases
According to the Arrhenius theory, a base, when dissolved in water, increases the concentration of which of the following ions?
1. $"H"^+$
2. $"OH"^-$
3. $"H"_3"O"^+$
4. $"H"_2"O"$
Grade 10 Biochemical Pathways
Oxygen is released during what part of photosynthesis?
1. Light Reactions
2. Calvin Cycle
3. Kreb's Cycle
4. Glycolysis
Enzymes in your body act as catalysts. Thus, the role of enzymes is to
2. increase the rate of chemical reactions.
3. inhibit chemical reactions.
4. decrease the rate of chemical reactions.
Grade 10 Acids and Bases
Which compound is an Arrhenius base?
1. $"SO"_2$
2. $"HNO"_3$
3. LiOH
4. $"H"_2"O"$
What are Carbohydrates?
1. Proteins made up of monomers.
2. Serve as building materials.
3. Make up cell membranes.
4. Organic molecules that are made up of sugar molecules.
1. $AgCl + Na rarr NaCl + Ag$
2. $CH_3COOH + CH_3CH_2OH rarr CH_3COOCH_3CH_2 + H_2O$
3. $2H_3PO_4 + 6LiOH rarr 2Li_3PO_4 + 6H_2O$