PSc Chemistry Past Exam Questions NC
Quiz by Douglas Goodfellow
HS Physical Science
Science
North Carolina Standard Course of Study
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28 questions
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- Q1A child fills a bucket with salt water and sand. How are the contents of the bucket classified?a compounda homogeneous mixturea solutiona heterogeneous mixture30sPSc.2.1.1
- Q2How are the processes of melting and freezing similar?They are both processes that physically change a substance.They are both processes where heat is released by a substanceThey are both processes where heat is absorbed by a substance.They are both processes that chemically change a substance.30sPSc.2.1.2
- Q3Which element is classified as a metal?antimony(Sb)boron(B)cadmium(Cd)phosphorus(P)30sPSc.2.1.1
- Q4Four different liquids will be separately poured into a single beaker. The liquids are ethanol, milk, oil, and water. The density for each liquid at room temperature is listed in the table below. How will the liquids be arranged from bottom to top in the beaker?water, milk, oil, ethanolwater, oil, ethanol, milkmilk, water, oil, ethanolmilk, water, ethanol, oil30sPSc.2.1.3
- Q5The diagram below is the Bohr model of an atom. Which best describes this atom?It has 6 electrons.It has a full outermost energy levelIt has a positive charge.It has 6 valence electrons30sPSc.2.1.4
- Q6How does a piece of paper’s ability to be folded in half compare to its ability to burn?Its ability to be folded is a physical property, while its ability to burn is a chemical property.Its ability to be folded is a chemical property, while its ability to burn is a physical property.Both are chemical properties of the piece of paper.Both are physical properties of the piece of paper.30sPSc.2.1.3
- Q7How many valence electrons are in a neutral atom of nitrogen (N)?1523530sPSc.2.2.1
- Q8Electrons are being shared between atoms in a certain compound. Which elements could most likely form this compound?aluminum (Al) and iodine (I)sulfur (S) and oxygen (O)lithium (Li) and fluorine (F)iron (Fe) and chlorine (Cl)30sPSc.2.2.2
- Q9What is the chemical formula for magnesium acetate?Mg(C2H3O2)2MgC4H6O4Mg2(C2H3O2)2Mg2C4H6O430sPSc.2.2.3
- Q10Which represents a balanced chemical equation?CH4 + 2O2 → CO2 + 2H2OCO2 + H2O → CH4 + O2CO2 + 2H2O → 2CH4 + 2O2CH4 + O2 → CO2 + H2O30sPSc.2.2.4
- Q11What type of chemical reaction occurs when beryllium (Be) combines with oxygen (O2) to form beryllium oxide (BeO)?single replacementdecompositiondouble replacementsynthesis30sPSc.2.2.5
- Q12Which equation represents a neutralization reaction?acid + base → water + saltacid + water → salt + basewater + base → salt + acidacid + salt → base + water30sPSc.2.2.6
- Q13Which of these elements is the most chemically reactive?strontium(Sr)radium(Ra)calcium(Ca)beryllium(Be)30sPSc.2.2.1
- Q14Which compound contains ionic bonds?Ca3N2PCl5C2H6SF230sPSc.2.2.2
- Q15This unbalanced equation represents a chemical reaction: Pb(NO3)2 + NaI → NaNO3 + PbI2 What is the coefficient for NaI once the equation is balanced?342130sPSc.2.2.4