WorksheetsChem 7.04 Pre-Assessment
Total questions: 7
Worksheet time: 4mins
Which of the following is a chemical equation (Chem 7.02 Lv2, 7.04 Lv 1)
K + Cl
Ca²⁺ - Cl⁻
AgNO₃(aq)+ NaCl(aq) ------> AgCl(s) + NaNO₃(aq)
NaCl
Which of the following would represent a synthesis reaction involving Magnesium and Bromine? (Chem 7.04 Lv2)
Mg + Br -----> MgBr₂
MgBr₂ ------> Mg + Br
Mg + NaBr ----> Na + MgBr₂
MgBr₂ + NaCl -----> NaBr + MgCl₂
Which of the following would represent a single displacement reaction involving Copper and Silver Nitrate? (Chem 7.04 Lv2)
Cu + Ag -----> CuAg
AgNO₃ ------> Cu+ Cl₃
AgNO₃ + Cu ------> Ag + CuNO₃
AgNO₃ + CuCl₂ -----> AgCl + CuNO₃
Which of the following would represent a combustion reaction of C4H10? (Chem 7.04 Lv2)
C₄H₁₀ -----> C₄ + H₁₀
C + H -----> C₄H₁₀
C₄H₁₀ + O₂ -----> CO₂ + H₂O
C₄H₁₀ + O₂ -----> CH₂ + C₂O
When the equation Fe₃O₄ + Al -----> Al₂O₃ + Fe is correctly balanced, what is the coefficient of Fe? (Chem 7.04 Lv3)
1
2
3
9
Which coefficients correctly balance the formula equation NH₄NO₂(s) -----> N₂(g) + H₂O(l)? (Chem 7.04 Lv3). The numbers are from left to right.
1, 2, 2
2 on just H2O
2, 1, 1
2, 2, 2
The complete balanced equation for the reaction between zinc hydroxide and acetic acid is (Chem 7.04 Lv3)
ZnOH + CH₃COOH -----> ZnCH₃COO + H₂O.
Zn(OH)₂ + CH₃COOH -----> Zn + 2CO₂ +3H₂O.
Zn(OH)₂ + 2CH₃COOH -----> Zn(CH₃COO)₂ + 2H₂O.
Zn(OH)₂ + 2CH₃COOH -----> Zn(CH₃COO)₂ + H₂ + O₂.
