Chem Practice Questions Flashcards
How do isotopes of the same element differ? A. They have different numbers of protons.
B. They have different atomic numbers.
C. They have different numbers of electrons.
D. They have different numbers of neutrons.
D. They have different numbers of neutrons.
Which of the following electron shells can hold a maximum of 32 electrons?
A. K-shell
B. L-shell
C. M-shell
D. N-shell
D. N-shell
Electrons that are shared between two atoms form which of the following types of bond?
A. Ionic
B. Metallic
C. Dipole-dipole
D. Covalent
D. Covalent
One negatively charged atom and one positively charged atom form which of the following types of bond?
A. Polar covalent
B. Ionic
C. Coordinate covalent
D. Metallic
B. Ionic
What is the name for the number of protons in an atom?
A. Atomic identity
B. Atomic mass
C. Atomic weight
D. Atomic number
D. Atomic number
Which element has the highest atomic radius?
A. Strontium
B. Uranium
C.Francium
D. Radium
C. Francium
Which of the following is a substituted hydrocarbon compound containing an oxygen molecule linking two hydrocarbon groups?
A. Aldehyde
B. Alcohol
C. Ether
D. Ketone
C. Ether
Which of the following is a compound with a nitrogen atom that contains a lone pair of electrons and is bound to one or more hydrocarbon groups?
A. Amine
B. Benzene
C. Carboxylic acid
D. Thiol
A. Amine
Which of the following cannot be found on the periodic table?
A. Bromine
B. Magnesium oxide
C. Phosphorous
D. Chlorine
B. Magnesium oxide
The most important feature of the periodic table is its arrangement according to:
A. Periodicity
B. Density
C. Electronegativity
D. State of matter
A. Periodicity
Which of the following is NOT an extensive property?
A. Volume
B. Temperature
C. Mass
D. Electrical charge
B. Temperature
Substance A has a density of 5.0 kg/m^3 and substance B has a density of 4.0 kg/m^3. What is the ratio of volume A to volume B when the masses of the two substances are equal?
A. 1.25
B. 0.80
C. 1.12
D. 0.89
B. 0.80
Which of the following forms of water is the densest?
A. Liquid
B. Steam
C. Ice
D. All forms of water have the same density
A. Liquid
Which of the following is the correct definition of a conductor?
A. A metal wire in an electrical circuit
B. A material that contains movable electric charges
C. A material that is not a semiconductor or insulator
D. Any device that allows electrics to flow
B. A material that contains moveable electric charges C
The state of matter in which atoms have the strongest bond is
A. Plasma
B. Liquid
C. Solid
D. Gas
C. Solid
2AgNO3 + Cu —> Cu(NO3)2 + 2Ag is which type of reaction?
A. Decomposition
B. Metathesis
C. Combustion
D. Single replacement
D. Single replacement
Which of these is a substance that increases the rate of a chemical reaction?
A. Catalyst
B. Brine
C. Solvent
D. Inhibitor
A. Catalyst
C6H12O6 + O2 —> CO2 + H2O
After balancing the following reaction, what is the coefficient of the molecule water?
A. 1
B. 2
C. 3
D. 6
D. 6
The rate of a chemical reaction depends on all of the following except?
A. Temperature
B. Surface area
C. Presence of catalysts
D. Amount of mass lost
D. Amount of mass lost
2NaOH(aq) + H2SO4(aq) —> Na2SO4aq + 2H2O(l)
The reaction of sodium hydroxide (NaOH) and sulfuric acid (H2SO4) in an aqueous solution is considered what type of reaction?
A. Single displacement
B. Double displacement
C. Decomposition
D. Synthesis
B. Double Displacement
Which of the following is NOT true about water?
A. It is nonpolar
B. It is cohesive
C. It is adhesive
D. It has a high specific heat
A. It is nonpolar B
A smooth sweet tea recipe calls for 150 grams of glucose (C6 H12 O6) and 1400 grams of water. What is the molarity of this mixture? (Use the following molar masses for C, H, O: C= 12.01g/mol, H= 1.008 g/mol, and O= 16.0g/mol. The density of water is 1g/mol.)
A. M = 0.695 mol/L
B. M = 0.595 mol/L
C. M = 0.505 mol/L
D. M = 0.650 mol/L
B. M = 0.595 mol/L
An acid is a substance that increases the ____ count in water.
A. Chloride ion
B. Hydroxide ion
C. Hydrogen ion
D. Oxygen
C. Hydrogen ion
Hydrogen bonding is responsible for all EXCEPT which of the following?
A. Providing structure and support to cellular molecules
B. Keeping two strand of DNA connected
C. Preserving the shape of proteins
D. Absorbing heat by incurring a large temperature change
D. Absorbing heat by incurring a large temperature change
Which choice below reflects a valid property of water that is due to hydrogen bonding?
A. Water is primarily a solute
B. Water has a low heat capacity
C. Water has a high heat of fusion
D. Water is an insulator
D. Water is an insulator
Which of the following correctly describes the prefix hecto-?
A. 10^-2
B. 10^-1
C. 10^1
D. 10^2
D. 10^2
Which of the following should be used for accurately measuring a small amount of liquid?
A. Beaker
B. Test tubes
C. Erlenmeyer flask
D. Pipette
D. Pipette
Which of the following is a statement of behavior that consolidates all current observations?
A. Hypothesis
B. Theory
C. Model
D. Assumption
B. Theory
A triple-beam balance measures which of the following?
A. Volume
B. Temperature
C. Mass
D. Luminous intensity
C. Mass
Which of the following prefixes indicates the largest multiple of the base unit?
A. Tera-
B. Giga-
C. Mega-
D. Pico-
A. Tera-
