Q. What is the volume occupied by 1 mole of an ideal gas at STP?
-
A.
22.4 L
-
B.
24 L
-
C.
20 L
-
D.
18 L
Solution
At STP, 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer: A — 22.4 L
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Q. What is the volume occupied by 4 moles of an ideal gas at STP?
-
A.
22.4 L
-
B.
44.8 L
-
C.
67.2 L
-
D.
89.6 L
Solution
At STP, 1 mole of gas occupies 22.4 L. Therefore, 4 moles occupy 4 x 22.4 L = 89.6 L.
Correct Answer: B — 44.8 L
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Q. What is the volume of 1 M NaOH solution required to obtain 0.5 moles of NaOH?
-
A.
0.5 L
-
B.
1 L
-
C.
2 L
-
D.
0.25 L
Solution
Using the formula M = moles/volume, Volume = moles/M = 0.5 moles / 1 M = 0.5 L.
Correct Answer: A — 0.5 L
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Q. What is the volume of 1 mole of an ideal gas at STP (Standard Temperature and Pressure)?
-
A.
22.4 L
-
B.
24.0 L
-
C.
18.0 L
-
D.
20.0 L
Solution
At STP, 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer: A — 22.4 L
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Q. What is the volume of 1 mole of an ideal gas at STP?
-
A.
22.4 L
-
B.
24 L
-
C.
10 L
-
D.
1 L
Solution
At STP (Standard Temperature and Pressure), 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer: A — 22.4 L
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Q. What is the volume of 1 mole of gas at STP?
-
A.
22.4 L
-
B.
24 L
-
C.
20 L
-
D.
18 L
Solution
At STP, 1 mole of gas occupies 22.4 liters.
Correct Answer: A — 22.4 L
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Q. What is the volume of 4 moles of an ideal gas at STP?
-
A.
22.4 L
-
B.
44.8 L
-
C.
89.6 L
-
D.
112 L
Solution
Volume = moles x volume per mole = 4 moles x 22.4 L/mole = 89.6 L.
Correct Answer: C — 89.6 L
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Q. What is the volume of a 2 M solution that contains 4 moles of solute?
-
A.
2 L
-
B.
4 L
-
C.
1 L
-
D.
0.5 L
Solution
Volume = moles of solute / molarity = 4 moles / 2 M = 2 L.
Correct Answer: B — 4 L
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Q. What is the volume of CO2 produced at STP when 2 moles of C2H5OH are completely combusted?
-
A.
22.4 L
-
B.
44.8 L
-
C.
67.2 L
-
D.
89.6 L
Solution
C2H5OH + 3O2 → 2CO2 + 3H2O. 2 moles of C2H5OH produce 4 moles of CO2. Volume = 4 * 22.4 L = 89.6 L.
Correct Answer: B — 44.8 L
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Q. What is the volume percent concentration of a solution containing 30 mL of ethanol in 150 mL of solution?
-
A.
20%
-
B.
25%
-
C.
30%
-
D.
15%
Solution
Volume percent = (volume of solute / total volume) x 100 = (30 mL / 150 mL) x 100 = 20%.
Correct Answer: B — 25%
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Q. What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?
-
A.
30%
-
B.
70%
-
C.
50%
-
D.
20%
Solution
Volume percent = (volume of solute / total volume) × 100 = (30 mL / (30 mL + 70 mL)) × 100 = 30%.
Correct Answer: A — 30%
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Q. What is the work done by a gas during an isothermal expansion from volume Vi to Vf?
-
A.
nRT ln(Vf/Vi)
-
B.
nR(Tf - Ti)
-
C.
Zero
-
D.
nRT
Solution
The work done by a gas during an isothermal expansion is W = nRT ln(Vf/Vi).
Correct Answer: A — nRT ln(Vf/Vi)
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Q. What is the work done by an ideal gas during an isothermal expansion from volume Vi to Vf?
-
A.
nRT ln(Vf/Vi)
-
B.
nR(Tf - Ti)
-
C.
Zero
-
D.
nRT
Solution
The work done by an ideal gas during an isothermal expansion is W = nRT ln(Vf/Vi).
Correct Answer: A — nRT ln(Vf/Vi)
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Q. What phenomenon occurs when a liquid rises in a narrow tube against gravity?
-
A.
Viscosity
-
B.
Surface tension
-
C.
Capillarity
-
D.
Hydrostatic pressure
Solution
Capillarity is the phenomenon where liquid rises in a narrow tube due to surface tension.
Correct Answer: C — Capillarity
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Q. What type of adsorption is characterized by the formation of strong chemical bonds?
-
A.
Physisorption
-
B.
Chemisorption
-
C.
Desorption
-
D.
Multilayer adsorption
Solution
Chemisorption is characterized by the formation of strong chemical bonds between the adsorbate and the adsorbent.
Correct Answer: B — Chemisorption
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Q. What type of adsorption occurs when the adsorbate forms strong chemical bonds with the adsorbent?
-
A.
Physisorption
-
B.
Chemisorption
-
C.
Desorption
-
D.
Sorption
Solution
Chemisorption involves the formation of strong chemical bonds between the adsorbate and the adsorbent.
Correct Answer: B — Chemisorption
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Q. What type of bond is formed between sodium and chlorine in NaCl?
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Metallic bond
-
D.
Van der Waals bond
Solution
NaCl is formed by an ionic bond due to the transfer of electrons from sodium to chlorine.
Correct Answer: A — Ionic bond
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Q. What type of bond is formed between two metal atoms?
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Metallic bond
-
D.
Polar bond
Solution
Metallic bonds are formed between metal atoms, characterized by a 'sea of electrons' that are free to move.
Correct Answer: C — Metallic bond
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Q. What type of deviation from Raoult's Law is observed in solutions with strong solute-solvent interactions?
-
A.
Positive deviation
-
B.
Negative deviation
-
C.
No deviation
-
D.
Complete miscibility
Solution
Negative deviation from Raoult's Law occurs when strong solute-solvent interactions lower the vapor pressure more than expected.
Correct Answer: B — Negative deviation
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Q. What type of hybridization is present in ethylene (C2H4)?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
Ethylene has sp2 hybridization due to the presence of a double bond between the carbon atoms.
Correct Answer: B — sp2
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Q. What type of hybridization is present in the carbon atom of ethylene (C2H4)?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
The carbon atoms in ethylene undergo sp2 hybridization.
Correct Answer: B — sp2
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Q. What type of hybridization is present in the molecule BF3?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
BF3 has sp2 hybridization as it has three bonding pairs and no lone pairs.
Correct Answer: B — sp2
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Q. What type of hybridization occurs in ethylene (C2H4)?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
Ethylene has sp2 hybridization as each carbon atom forms three sigma bonds and one pi bond.
Correct Answer: B — sp2
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Q. What type of hybridization occurs in methane (CH4)?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
Methane has sp3 hybridization as it has four equivalent bonds formed by the mixing of one s and three p orbitals.
Correct Answer: C — sp3
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Q. What type of hybridization occurs in the carbon atom of ethylene (C2H4)?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
The carbon atoms in ethylene undergo sp2 hybridization, resulting in a planar structure.
Correct Answer: B — sp2
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Q. What type of intermolecular force is present in H2O?
-
A.
London dispersion forces
-
B.
Dipole-dipole interactions
-
C.
Hydrogen bonding
-
D.
Ionic interactions
Solution
H2O exhibits hydrogen bonding due to the presence of hydrogen atoms bonded to highly electronegative oxygen.
Correct Answer: C — Hydrogen bonding
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Q. What type of intermolecular force is present in water (H2O)?
-
A.
London dispersion
-
B.
Dipole-dipole
-
C.
Hydrogen bonding
-
D.
Ionic
Solution
Water exhibits hydrogen bonding due to the presence of O-H bonds.
Correct Answer: C — Hydrogen bonding
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Q. What type of intermolecular force is present in water?
-
A.
London dispersion forces
-
B.
Dipole-dipole interactions
-
C.
Hydrogen bonding
-
D.
Ionic interactions
Solution
Water exhibits hydrogen bonding due to the presence of O-H bonds and the polarity of the molecule.
Correct Answer: C — Hydrogen bonding
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Q. What type of intermolecular forces are present in water?
-
A.
London dispersion forces
-
B.
Dipole-dipole forces
-
C.
Hydrogen bonds
-
D.
All of the above
Solution
Water exhibits all three types of intermolecular forces, including hydrogen bonds, dipole-dipole interactions, and London dispersion forces.
Correct Answer: D — All of the above
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Q. What type of isotherm is represented by the Freundlich equation?
-
A.
Langmuir isotherm
-
B.
BET isotherm
-
C.
Freundlich isotherm
-
D.
Temkin isotherm
Solution
The Freundlich equation describes a type of adsorption isotherm that is applicable to heterogeneous surfaces.
Correct Answer: C — Freundlich isotherm
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