Untitled form
Switch account Draft saved
* Indicates required question
Email *
ta
Must be a valid email
What is the correct order of orbital filling according to the Aufbau principle?
(1s \to 2p \to 2s \to 3s \to 3p)
(1s \to 2s \to 2p \to 3s \to 3p \to 4s \to 3d)
(1s \to 2s \to 3s \to 2p \to 3p)
(1s \to 2s \to 2p \to 3s \to 3p \to 3d)
Forces that occur when the partially positively charged part of a molecule interacts
with the partially negatively charged part of the neighboring molecule is
Dipole-Dipole Interactions
Ionic bonding
Dipole interaction
Hydrogen bonding
,Which of the following represents the correct oxidation half-equation from the
redox reaction between permanganate and iron(II) ions?
Mn²⁺ → MnO₄⁻ + 5e⁻ + 8H⁺
Fe³⁺ + e⁻ → Fe²⁺
MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O
Fe²⁺ → Fe³⁺ + e⁻
What combination of quantum numbers violates the Pauli exclusion principle?
(n = 2, l = 1, m = -1, s = +1/2) and (n = 2, l = 1, m = -1, s = +1/2)
(n = 1, l = 0, m = 0, s = +1/2) and (n = 1, l = 0, m = 0, s = -1/2)
(n = 3, l = 2, m = 0, s = -1/2) and (n = 3, l = 2, m = -2, s = +1/2)
(n = 4, l = 3, m = 1, s = +1/2) and (n = 4, l = 2, m = -1, s = -1/2)
The mixing of two or more atomic orbital of the same energy level to form a hybrid
orbital is known as……
Atomic orbital theory
Isomerism
Chemical bonding
Hybridization
,Which statement is true for the combustion of ethanol?
C2H5OH (l) + 3O2(g) → 2CO2 (g) + 3H2O(l) with ∆H = -1370 kJ
The enthalpy of the products is lower than the potential energy of the reactants.
The reaction is endothermic.
The products occupy a smaller volume than the reactants
The enthalpy change would be the same is gaseous water were produced.
Calculate the change in entropy for the reaction (ΔSº): 2 SO2(g)+O2(g)→2 SO3(g)
given ΔSº(SO2(g))=248.2 J/mol\K, ΔSº(O2(g))=205.0 J/mol/K and ΔSº
(SO3(g))=256.8 J/mol/K
ΔSº = −187.8 J/mol/K
ΔSº = 196.4 J/mol/K
ΔSº = 187.8 J/mol/K
ΔSº = −196.4 J/mol/K
Which indicator is used in strong acid–strong base titration?
Methyl orange
Phenolphthalein
Starch
Bromothymol blue
, What values can the azimuthal quantum number (l) take for a principal quantum
number n = 3?
0, 1, and 2
Only 3
1, 2, and 3
0, 1, 2, and 3
Who among the following supported and refined Democritus’s atomic ideas,
influencing later scientists?
Epicurus
Isaac Newton
Socrates
Lavoisier
Which of the following accurately describes isotopes of an element?
Different numbers of protons but the same atomic number
Same number of protons but different number of neutrons
Same chemical properties but different atomic numbers
Same number of electrons but different atomic masses
Switch account Draft saved
* Indicates required question
Email *
ta
Must be a valid email
What is the correct order of orbital filling according to the Aufbau principle?
(1s \to 2p \to 2s \to 3s \to 3p)
(1s \to 2s \to 2p \to 3s \to 3p \to 4s \to 3d)
(1s \to 2s \to 3s \to 2p \to 3p)
(1s \to 2s \to 2p \to 3s \to 3p \to 3d)
Forces that occur when the partially positively charged part of a molecule interacts
with the partially negatively charged part of the neighboring molecule is
Dipole-Dipole Interactions
Ionic bonding
Dipole interaction
Hydrogen bonding
,Which of the following represents the correct oxidation half-equation from the
redox reaction between permanganate and iron(II) ions?
Mn²⁺ → MnO₄⁻ + 5e⁻ + 8H⁺
Fe³⁺ + e⁻ → Fe²⁺
MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O
Fe²⁺ → Fe³⁺ + e⁻
What combination of quantum numbers violates the Pauli exclusion principle?
(n = 2, l = 1, m = -1, s = +1/2) and (n = 2, l = 1, m = -1, s = +1/2)
(n = 1, l = 0, m = 0, s = +1/2) and (n = 1, l = 0, m = 0, s = -1/2)
(n = 3, l = 2, m = 0, s = -1/2) and (n = 3, l = 2, m = -2, s = +1/2)
(n = 4, l = 3, m = 1, s = +1/2) and (n = 4, l = 2, m = -1, s = -1/2)
The mixing of two or more atomic orbital of the same energy level to form a hybrid
orbital is known as……
Atomic orbital theory
Isomerism
Chemical bonding
Hybridization
,Which statement is true for the combustion of ethanol?
C2H5OH (l) + 3O2(g) → 2CO2 (g) + 3H2O(l) with ∆H = -1370 kJ
The enthalpy of the products is lower than the potential energy of the reactants.
The reaction is endothermic.
The products occupy a smaller volume than the reactants
The enthalpy change would be the same is gaseous water were produced.
Calculate the change in entropy for the reaction (ΔSº): 2 SO2(g)+O2(g)→2 SO3(g)
given ΔSº(SO2(g))=248.2 J/mol\K, ΔSº(O2(g))=205.0 J/mol/K and ΔSº
(SO3(g))=256.8 J/mol/K
ΔSº = −187.8 J/mol/K
ΔSº = 196.4 J/mol/K
ΔSº = 187.8 J/mol/K
ΔSº = −196.4 J/mol/K
Which indicator is used in strong acid–strong base titration?
Methyl orange
Phenolphthalein
Starch
Bromothymol blue
, What values can the azimuthal quantum number (l) take for a principal quantum
number n = 3?
0, 1, and 2
Only 3
1, 2, and 3
0, 1, 2, and 3
Who among the following supported and refined Democritus’s atomic ideas,
influencing later scientists?
Epicurus
Isaac Newton
Socrates
Lavoisier
Which of the following accurately describes isotopes of an element?
Different numbers of protons but the same atomic number
Same number of protons but different number of neutrons
Same chemical properties but different atomic numbers
Same number of electrons but different atomic masses
