Physical and Chemical Processes (Grades 11-12)
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Physical and Chemical Processes
1.
Consider the following endothermic reaction:
[math]N_2(g) + O_2(g) rarr 2NO (g) [/math]
[math]DeltaH = +180 (kJ)/(mol[/math]
Which statement correctly defines this endothermic reaction?
[math]N_2(g) + O_2(g) rarr 2NO (g) [/math]
[math]DeltaH = +180 (kJ)/(mol[/math]
Which statement correctly defines this endothermic reaction?
- Product is less stable than the reactants
- Heat is evolved in this reaction
- Reaction proceeds spontaneously in the forward direction
- Enthalpy of products is less than those of reactants
2.
Which statement correctly defines an exothermic reaction?
- A chemical reaction with evolution of heat
- A chemical reaction with absorption of heat
- A chemical reaction with no change in internal energy
- A chemical chemical with no change in temperature
3.
Which chemical equation shows precipitation?
- [math]NaCl + AgNO_3 rarr AgCl darr + NaNO_3[/math]
- [math]NaOH + HCl rarrNaCl + H_2O[/math]
- [math]Fe^(2+) + Ce^(4+ ) hArr Fe^(3+) + Ce^(3+)[/math]
- [math]CH_3COOH + NaOH -> CH_3COONa + H_2O[/math]
4.
Which of the following is a type of acid-base reaction?
- Neutralization reaction
- Synthesis reaction
- Decomposition reaction
- Redox reaction
5.
Which chemical equation shows an acid-base reaction?
- [math]CH_3COOH + NaOH ->CH_3COONa + H_2O[/math]
- [math](Cr_2O_7)^(2-) + 14H^+ + 6e^(-) hArr 2Cr^(3+) + 7H_2O[/math][math][/math]
- [math]Fe^(2+) + Ce^(4+) hArr Fe^(3+) + Ce^(3+[/math]
- [math]Cl^(-) + Ag^(+) rArr AgCl(s)[/math]
6.
Which chemical equation shows a redox reaction?
- [math]CH_3COOH + NaOH -> CH_3COONa + H_2O[/math]
- [math]Cl^(-) + Ag^(+) ->AgCl darr[/math][math][/math]
- [math]5Fe^(2+) + MnO_4^(1-) + 8H_3O^+ rArr6Fe^(3+) + Mn^(2+) + 12H_2O[/math]
- [math]HCl + NaOH -> NaCl + H_2O[/math]
7.
In which of the following chemical reactions are the reactants completely converted into products?
- [math]2KClO_3(s) -> 2KCl (s) + 3O_2(g) uarr[/math]
- [math]N_2(g) + 3H_2(g) hArr 2NH_3(g)[/math]
- [math]N_2O_4 (g) hArr 2NO_2(g)[/math]
- [math]N_2(g) + O_2(g) hArr 2NO(g)[/math]
8.
Which of the following chemical equations represents a physical change?
- [math]H_2O(l) harr H_2O (g)[/math]
- [math]N_2(g) + O_2(g) harr 2NO(g)[/math]
- [math]CaCO_3(s) harr CaO (s) + CO_2(g)[/math]
- [math]C(s) + CO_2(g) harr 2CO(g)[/math]
9.
In exothermic reactions, the enthalpy of the products is less than that of the reactants.
- True
- False
10.
A hydrocarbon and oxygen gas are typical reactants in a reaction.
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