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WorksheetsLC Chap 5 Chemical Bonding TS
Total questions: 38
Worksheet time: 19mins
Which statement best defines ionic bonding?
Sharing electron pairs between adjacent atoms
Delocalized electrons moving in metal lattices
Weak forces between nonpolar molecular surfaces
Attraction between opposite ions forming compounds
According to the octet rule, what do atoms tend to achieve when bonding?
Balanced numbers of protons and neutrons
Eight electrons in the outer shell
Six electrons in the inner shell
Full s subshell in the nucleus
Which feature about transition metals is generally true?
Filled d sublevel prevents ions
Variable valency due to d sublevel
Always fixed +2 oxidation state
No coloured compounds formed
What is the correct formula for carbonate ion?
CO3^2− with −2 charge
CO2^− with −1charge
HCO3− with −1 charge
CO3^− with −1 charge
Which property is typical of ionic substances at room temperature?
Conductive solids with mobile electrons
Hard and brittle crystalline solids
Soft and malleable metallic sheets
Volatile low-boiling liquids
Select the correctly balanced ionic formula for iron(II) carbonate.
FeCO3
Fe2CO3
Fe2(CO3)3
Fe(CO3)2
Which statement explains why ionic substances form crystal lattices?
Like charges align to repel neighbors
Neutral atoms pack by van der Waals
Opposite ions attract in all directions
Electrons pair to form shared orbitals
Which statement best defines a covalent bond?
Metal nuclei embedded in electron sea
Sharing of one or more electron pairs
Attraction between full ionic charges
Transfer of electrons to form ions
In a covalent molecule, which type of electron pair is NOT involved in bonding?
Lone pairs near the central atom
Delocalized pairs around all atoms
Resonance pairs across multiple bonds
Bonding pairs between two atoms
Why do lone pairs generally decrease bond angles compared to bonding pairs?
They are farther from the nucleus
They increase overlap of orbitals
They attract electrons more strongly
They repel the bonding pairs
Which description correctly characterizes a sigma (σ) bond?
Overlap only between d orbitals
Sideways overlap of p orbitals
Overlap that cannot occur in single bonds
Head-on overlap forming a molecular orbital
Which statement about pi (π) bonds is accurate?
Formed by head-on orbital overlap
Stronger than sigma due to more overlap
Formed by sideways overlap of p orbitals
Only present in single bonds with s orbitals
Using VSEPR, what is the expected shape for a molecule with four total bond pairs and zero lone pairs on the central atom?
Pyramidal geometry
Tetrahedral geometry
Trigonal planar geometry
V-shaped geometry
What is the approximate bond angle in a trigonal planar molecule (AB3 with zero lone pairs)?
109.5 degrees around center
104.5 degrees around center
120 degrees around center
180 degrees around center
Ammonia (NH3) has four total bond pairs with one lone pair on nitrogen. Which shape does it adopt?
V-shaped geometry configuration
Pyramidal geometry configuration
Trigonal planar configuration
Linear geometry configuration
Which pair correctly matches bond type with sigma and pi count?
Triple bond: one sigma, one pi
Triple bond: two sigma, one pi
Double bond: two sigma only
Double bond: one sigma, one pi
Reasoning with VSEPR: Water (H2O) has two bonding pairs and two lone pairs on oxygen. Which statement explains its bent shape and smaller angle than tetrahedral?
Linear arrangement maximizes separation
Lone pairs reduce angles by stronger repulsion
Bonding pairs repel more than lone pairs
Trigonal planar minimizes lone pair repulsion
Which statement correctly distinguishes cations from anions?
Cations are positive ions, anions are negative
Cations are negative ions, anions are positive
Cations and anions are both neutral species
Cations carry variable charge, anions carry none
Aqueous silver nitrate is added to a chloride solution. Which observation confirms chloride?
White precipitate soluble in dilute ammonia
Yellow precipitate insoluble in ammonia
Colorless solution with gas evolution
Blue precipitate forming and dissolving
Which balanced ionic equation represents the formation of silver chloride?
Ag+ + Cl− → AgCl(s)
Ag+ + SO4 2− → Ag2SO4(s)
Ag+ + CO3 2− → Ag2CO3(s)
Ag+ + NO3 − → AgNO3(s)
Barium chloride is added to a solution containing sulfate or sulfite. What distinguishes sulfate from sulfite when dilute HCl is then added?
Neither forms a precipitate initially
Sulfate dissolves; sulfite remains
Both dissolve completely in acid
Sulfate precipitate remains; sulfite dissolves
Which net ionic equation explains sulfite behavior with acid after forming BaSO3?
SO3 2− + 2H+ → SO2 + H2O
SO4 2− + 2H+ → H2SO4
SO4 2− + Ba2+ → BaSO4(s) dissolves
SO3 2− + Ba2+ → BaSO3(s) only
Adding dilute HCl to a solid carbonate gives which diagnostic observations?
Fizzing and gas turns limewater milky
No visible change in the mixture
Yellow precipitate with warming
Brown ring at interface of layers
How can hydrogencarbonate be distinguished from carbonate using MgSO4?
Both give identical precipitates instantly
Carbonate gives immediate white precipitate; hydrogencarbonate none
Hydrogencarbonate gives immediate white precipitate; carbonate none
Both give no precipitate until boiling
Which sequence describes the Brown Ring test for nitrate?
Add BaCl2, then dilute HCl; persistent white precipitate
Add NH3, then AgNO3; white precipitate dissolves
Add MgSO4 to fresh solution; boil for precipitate
Add FeSO4, then concentrated H2SO4; brown ring at junction
Which inference is drawn when the brown ring appears during the nitrate test?
Nitrate ions are present in the sample
Sulfate ions are confirmed in solution
Carbonate contamination is indicated
Phosphate ions are absent in solution
Phosphate ions are identified using ammonium molybdate with concentrated nitric acid and warming. What observation confirms phosphate?
Yellow precipitate forms upon warming
Gas is evolved turning limewater milky
Brown ring forms at liquid interface
White precipitate dissolves in ammonia
Which outcome correctly differentiates carbonate and hydrogencarbonate upon boiling after MgSO4 addition?
Both give precipitate without boiling
Neither gives a precipitate even on boiling
Carbonate yields precipitate only on boiling
Hydrogencarbonate yields precipitate only on boiling
Which of the following is the correct name for the ion with the formula NH4+?
Ammonium
Acetate
Bromide
Carbonate
Which ion has the formula CO32-?
Carbonate
Chlorate
Chromate
Dichromate
What is the name of the ion with the formula NO3-?
Nitrite
Nitrate
Nitride
Oxide
What is the name of the ion with the formula CrO42-?
Chromate
Dichromate
Permanganate
Phosphate
What is the name of the ion with the formula CrO42-?
Chromate
Dichromate
Permanganate
Phosphate
Which ion has the formula MnO4-?
Oxide
Permanganate
Phosphate
Sulfate
What is the name of the ion with the formula SO42-?
Sulfate
Sulfite
Sulfide
Hydrogen sulfate
What is the name of the ion with the formula PO43-?
Phosphate
Dihydrogen phosphate
Oxalate
Permanganate
What is the name of the ion with the formula OH-?
Hydride
Hydroxide
Sulfide
Sulfite
What is the name of the ion with the formula SO32-?
Sulfate
Sulfite
Sulfide
Hydrogen sulfite
