Chemical Reactions-Chemical Reactions-Standard WarmupsStandard Warmups

1. In a chemical reaction, there is 1. In a chemical reaction, there is conservation of – conservation of –

A Energy, volume, and massA Energy, volume, and mass

B Energy, volume, and chargeB Energy, volume, and charge

C Mass, charge, and energyC Mass, charge, and energy

D Mass, charge, and volume D Mass, charge, and volume

AnswerAnswer

C is the correct answer. C is the correct answer.

2. Given the balanced equation representing 2. Given the balanced equation representing a reaction:a reaction:

ClCl22→ Cl + Cl→ Cl + Cl

A A bond is broken as energy is absorbed.A A bond is broken as energy is absorbed.

B A bond is broken as energy is released.B A bond is broken as energy is released.

C A bond is formed as energy is absorbed.C A bond is formed as energy is absorbed.

D A bond is formed as energy is released. D A bond is formed as energy is released.

AnswerAnswer

A is the correct answer.A is the correct answer.

3. What is the chemical formula of 3. What is the chemical formula of

iron(III) sulfide?iron(III) sulfide?

A FeSA FeS

B FeB Fe22SS33

C FeSOC FeSO33

D FeD Fe22(SO(SO33))33

AnswerAnswer

B is the correct answer. B is the correct answer.

4. Given the balanced equation representing 4. Given the balanced equation representing

a reaction:a reaction:

Zn(s) + HZn(s) + H22SOSO44(aq) → ZnSO(aq) → ZnSO44(aq)+ H(aq)+ H22(g)(g) Which type of reaction is represented by Which type of reaction is represented by

this equation?this equation?A decompositionA decomposition

B double replacementB double replacement

C single replacementC single replacement

D synthesisD synthesis

AnswerAnswer

C is the correct answer.C is the correct answer.

5. Given the balanced equation representing 5. Given the balanced equation representing

a reaction:a reaction:

2NaCl → 2Na + Cl2NaCl → 2Na + Cl22 To break the bonds in NaCl, the reactant To break the bonds in NaCl, the reactant

must must

A Absorb energyA Absorb energy

B Create energyB Create energy

C Destroy energyC Destroy energy

D Releases energyD Releases energy

AnswerAnswer

A is the correct answer.A is the correct answer.

6. A molecular compound is formed 6. A molecular compound is formed when a chemical reaction occurs when a chemical reaction occurs between atoms of–between atoms of–

A chlorine and sodiumA chlorine and sodium

B chlorine and yttriumB chlorine and yttrium

C oxygen and hydrogenC oxygen and hydrogen

D oxygen and magnesiumD oxygen and magnesium

AnswerAnswer

C is the correct answer.C is the correct answer.

7. Which balanced equation represents a 7. Which balanced equation represents a single replacement reaction –single replacement reaction –

A Mg + 2AgNOA Mg + 2AgNO33 → Mg(NO → Mg(NO33))22 + 2Ag + 2Ag

B 2Mg + OB 2Mg + O22 → 2Mg → 2Mg

C MgCOC MgCO3 3 → MgO + CO → MgO + CO22

D MgClD MgCl22 + 2AgNO + 2AgNO33 → 2AgCl + → 2AgCl + Mg(NOMg(NO33))22

AnswerAnswer

A is the correct answer.A is the correct answer.

8. A balanced equation representing a 8. A balanced equation representing a

chemical reaction can be written using chemical reaction can be written using ––

A chemical formulas and mass numberA chemical formulas and mass number

B chemical formulas and coefficientsB chemical formulas and coefficients

C first ionization energies and mass C first ionization energies and mass numbernumber

D first ionization energies and coefficient D first ionization energies and coefficient

AnswerAnswer

B is the correct answer.B is the correct answer.

9. In which type of reaction do two or 9. In which type of reaction do two or more substances combine to more substances combine to produce a single substanceproduce a single substance

A synthesisA synthesis

B decompositionB decomposition

C single replacementC single replacement

D double replacement D double replacement

AnswerAnswer

A is the correct answer.A is the correct answer.

10. An ionic compound is formed when there 10. An ionic compound is formed when there is a reaction between the element –is a reaction between the element –

A oxygen and chlorineA oxygen and chlorine

B strontium and chlorineB strontium and chlorine

C nitrogen and oxygenC nitrogen and oxygen

D sulfur and oxygen D sulfur and oxygen

AnswerAnswer

B is the correct answer.B is the correct answer.