Q. Which of the following sets of quantum numbers corresponds to a 3p electron?
A.
n=3, l=0, m_l=0
B.
n=3, l=1, m_l=1
C.
n=2, l=1, m_l=0
D.
n=3, l=2, m_l=0
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Solution
For a 3p electron, n=3 and l=1. The magnetic quantum number m_l can be -1, 0, or +1.
Correct Answer: B — n=3, l=1, m_l=1
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Q. Which of the following sets of quantum numbers corresponds to an electron in a 4d orbital?
A.
n=4, l=0, m_l=0
B.
n=4, l=2, m_l=1
C.
n=3, l=2, m_l=2
D.
n=4, l=1, m_l=0
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Solution
For a 4d orbital, n=4 and l=2. The m_l value can be -2, -1, 0, +1, +2.
Correct Answer: B — n=4, l=2, m_l=1
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Q. Which of the following sets of quantum numbers is not allowed?
A.
n=2, l=1, m_l=0
B.
n=3, l=2, m_l=2
C.
n=1, l=0, m_l=1
D.
n=4, l=3, m_l=-3
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Solution
For l=0, m_l can only be 0. Therefore, n=1, l=0, m_l=1 is not allowed.
Correct Answer: C — n=1, l=0, m_l=1
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Q. Which of the following sets of quantum numbers is not possible?
A.
n=3, l=2, m_l=1
B.
n=2, l=1, m_l=2
C.
n=4, l=3, m_l=0
D.
n=1, l=0, m_l=0
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Solution
For l=1, m_l can only be -1, 0, or +1. Therefore, m_l=2 is not possible.
Correct Answer: B — n=2, l=1, m_l=2
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Q. Which of the following shapes can be formed by folding the paper?
A.
Shape 1
B.
Shape 2
C.
Shape 3
D.
Shape 4
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Solution
Shape 1 can be formed by folding the paper along the specified lines.
Correct Answer: A — Shape 1
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Q. Which of the following shapes completes the pattern? (2022)
A.
Shape 1
B.
Shape 2
C.
Shape 3
D.
Shape 4
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Solution
Shape 4 completes the pattern as it follows the established sequence.
Correct Answer: D — Shape 4
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Q. Which of the following shapes does not belong to the group: Circle, Square, Triangle, Rectangle? (2022)
A.
Circle
B.
Square
C.
Triangle
D.
Rectangle
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Solution
All except Circle have straight edges.
Correct Answer: A — Circle
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Q. Which of the following shapes has the largest moment of inertia for the same mass and radius?
A.
Solid sphere
B.
Hollow sphere
C.
Solid cylinder
D.
Hollow cylinder
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Solution
The hollow sphere has the largest moment of inertia compared to the other shapes for the same mass and radius.
Correct Answer: B — Hollow sphere
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Q. Which of the following shapes is not a polygon?
A.
Pentagon
B.
Hexagon
C.
Circle
D.
Octagon
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Solution
A Circle is not a polygon as it does not have straight edges.
Correct Answer: C — Circle
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Q. Which of the following social changes was a direct result of the French Revolution?
A.
Reinforcement of monarchies across Europe.
B.
Establishment of a classless society.
C.
Promotion of the idea of citizenship and individual rights.
D.
Return to feudal systems.
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Solution
The French Revolution introduced the concepts of citizenship and individual rights, challenging the traditional hierarchies and monarchies of the time.
Correct Answer: C — Promotion of the idea of citizenship and individual rights.
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Q. Which of the following social reformers is associated with the establishment of the 'Arya Samaj' that aimed at social reform and justice?
A.
Raja Ram Mohan Roy
B.
Swami Vivekananda
C.
Dayananda Saraswati
D.
Gopal Krishna Gokhale
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Solution
Dayananda Saraswati founded the Arya Samaj in 1875, which aimed at social reform, including the promotion of education and the eradication of caste discrimination.
Correct Answer: C — Dayananda Saraswati
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Q. Which of the following solids has a high degree of anisotropy? (2019)
A.
Ionic solids
B.
Covalent solids
C.
Metallic solids
D.
Molecular solids
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Solution
Covalent solids exhibit a high degree of anisotropy due to their directional bonding.
Correct Answer: B — Covalent solids
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Q. Which of the following solids has a high thermal conductivity? (2019)
A.
Ionic solids
B.
Covalent solids
C.
Metallic solids
D.
Molecular solids
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Solution
Metallic solids have high thermal conductivity due to the presence of free-moving electrons.
Correct Answer: C — Metallic solids
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Q. Which of the following solutions has the highest boiling point elevation? (2020)
A.
0.1 M NaCl
B.
0.1 M KCl
C.
0.1 M CaCl2
D.
0.1 M MgCl2
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Solution
Boiling point elevation is proportional to the number of particles in solution. CaCl2 dissociates into 3 ions (1 Ca²⁺ and 2 Cl⁻), giving the highest elevation.
Correct Answer: C — 0.1 M CaCl2
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Q. Which of the following solutions has the highest boiling point?
A.
0.1 M NaCl
B.
0.1 M KCl
C.
0.1 M CaCl2
D.
0.1 M glucose
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Solution
CaCl2 dissociates into 3 ions (Ca^2+ and 2 Cl^-), leading to the highest boiling point elevation among the options.
Correct Answer: C — 0.1 M CaCl2
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Q. Which of the following solutions has the highest concentration?
A.
0.1 M NaCl
B.
0.2 M KCl
C.
0.05 M CaCl2
D.
0.3 M MgSO4
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Solution
Concentration in terms of molarity: 0.1 M NaCl = 0.1, 0.2 M KCl = 0.2, 0.05 M CaCl2 = 0.15 (0.05*3), 0.3 M MgSO4 = 0.3. Highest is 0.3 M MgSO4.
Correct Answer: D — 0.3 M MgSO4
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Q. Which of the following solutions has the highest freezing point? (2020)
A.
0.1 M NaCl
B.
0.1 M KCl
C.
0.1 M glucose
D.
0.1 M CaCl2
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Solution
0.1 M glucose is a non-electrolyte and does not dissociate, thus it has the highest freezing point compared to the ionic solutions.
Correct Answer: C — 0.1 M glucose
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Q. Which of the following solutions will have the highest boiling point?
A.
0.1 M NaCl
B.
0.1 M KCl
C.
0.1 M glucose
D.
0.1 M MgCl2
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Solution
0.1 M MgCl2 will have the highest boiling point due to the highest van 't Hoff factor (i = 3).
Correct Answer: D — 0.1 M MgCl2
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Q. Which of the following solutions will have the lowest freezing point?
A.
0.1 M NaCl
B.
0.1 M KBr
C.
0.1 M MgCl2
D.
0.1 M glucose
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Solution
MgCl2 dissociates into 3 ions, leading to the greatest freezing point depression among the options.
Correct Answer: C — 0.1 M MgCl2
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Q. Which of the following solutions will have the lowest vapor pressure?
A.
0.1 M NaCl
B.
0.1 M KBr
C.
0.1 M MgCl2
D.
0.1 M glucose
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Solution
MgCl2 dissociates into 3 ions, leading to the highest number of solute particles and thus the lowest vapor pressure.
Correct Answer: C — 0.1 M MgCl2
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Q. Which of the following species acts as a reducing agent in the reaction 2Fe2O3 + 3C → 4Fe + 3CO2? (2020)
A.
Fe2O3
B.
C
C.
Fe
D.
CO2
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Solution
Carbon (C) acts as a reducing agent as it donates electrons to reduce Fe2O3 to Fe.
Correct Answer: B — C
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Q. Which of the following species acts as a reducing agent in the reaction 2Fe2O3 + 3C → 4Fe + 3CO? (2022)
A.
Fe2O3
B.
C
C.
Fe
D.
CO
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Solution
Carbon (C) acts as a reducing agent as it donates electrons to reduce Fe2O3 to Fe.
Correct Answer: B — C
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Q. Which of the following species can act as an oxidizing agent? (2023)
A.
Na+
B.
Cl-
C.
H2O
D.
MnO4-
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Solution
MnO4- is a strong oxidizing agent because it can gain electrons and be reduced to Mn2+.
Correct Answer: D — MnO4-
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Q. Which of the following species exhibits sp3d hybridization?
A.
SF4
B.
XeF2
C.
NH3
D.
C2H4
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Solution
In SF4, the sulfur atom is sp3d hybridized, resulting in a seesaw molecular geometry.
Correct Answer: A — SF4
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Q. Which of the following species has a bond order of 1?
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Solution
F2 has a bond order of 1, calculated as (8 bonding electrons - 6 antibonding electrons)/2 = 1.
Correct Answer: C — F2
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Q. Which of the following species has a central atom with sp3 hybridization?
A.
CCl4
B.
CO2
C.
BF3
D.
H2O
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Solution
In CCl4, the central carbon atom is sp3 hybridized, forming a tetrahedral geometry.
Correct Answer: A — CCl4
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Q. Which of the following species has a linear geometry due to hybridization?
A.
H2O
B.
CO2
C.
NH3
D.
CH4
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Solution
CO2 has a linear geometry due to the sp hybridization of the carbon atom.
Correct Answer: B — CO2
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Q. Which of the following species has a linear molecular geometry?
A.
BeCl2
B.
NH3
C.
H2O
D.
CH3Cl
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Solution
BeCl2 has two bonding pairs and no lone pairs, resulting in a linear molecular geometry.
Correct Answer: A — BeCl2
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Q. Which of the following species has a linear molecular shape?
A.
BeCl2
B.
SF6
C.
NH3
D.
H2O
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Solution
BeCl2 has two bonding pairs and no lone pairs, resulting in a linear shape.
Correct Answer: A — BeCl2
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Q. Which of the following species has a tetrahedral shape?
A.
CH4
B.
C2H4
C.
NH3
D.
H2O
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Solution
CH4 has a tetrahedral shape due to sp3 hybridization of the carbon atom.
Correct Answer: A — CH4
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