Q. Which of the following factors does NOT affect the equilibrium constant (K) of a reaction?
A.
Temperature
B.
Concentration of reactants
C.
Pressure
D.
Nature of reactants and products
Show solution
Solution
The equilibrium constant K is only affected by temperature. Changes in concentration or pressure will shift the position of equilibrium but not change the value of K.
Correct Answer: B — Concentration of reactants
Learn More →
Q. Which of the following factors does NOT affect the equilibrium constant (K)?
A.
Temperature
B.
Concentration of reactants
C.
Pressure
D.
Nature of reactants and products
Show solution
Solution
The equilibrium constant K is only affected by temperature. Changes in concentration or pressure will shift the position of equilibrium but not change the value of K.
Correct Answer: B — Concentration of reactants
Learn More →
Q. Which of the following factors does NOT affect the equilibrium constant of a reaction?
A.
Temperature
B.
Concentration of reactants
C.
Pressure
D.
Nature of reactants
Show solution
Solution
The equilibrium constant is only affected by temperature; changes in concentration or pressure do not affect it.
Correct Answer: B — Concentration of reactants
Learn More →
Q. Which of the following factors does NOT affect the Gibbs Free Energy of a system?
A.
Temperature
B.
Pressure
C.
Concentration of reactants
D.
Nature of the solvent
Show solution
Solution
While temperature, pressure, and concentration of reactants affect Gibbs Free Energy, the nature of the solvent does not directly affect ΔG.
Correct Answer: D — Nature of the solvent
Learn More →
Q. Which of the following factors does NOT affect the position of equilibrium?
A.
Concentration of reactants
B.
Temperature
C.
Pressure
D.
Catalyst
Show solution
Solution
A catalyst speeds up the rate of reaching equilibrium but does not affect the position of the equilibrium itself.
Correct Answer: D — Catalyst
Learn More →
Q. Which of the following factors does NOT affect the pressure of a gas?
A.
Volume
B.
Temperature
C.
Number of moles
D.
Color of the gas
Show solution
Solution
The color of the gas does not affect its pressure; pressure is affected by volume, temperature, and number of moles.
Correct Answer: D — Color of the gas
Learn More →
Q. Which of the following factors does NOT affect the rate of a chemical reaction?
A.
Concentration of reactants
B.
Temperature
C.
Presence of a catalyst
D.
Color of the reactants
Show solution
Solution
The color of the reactants does not affect the rate of a chemical reaction.
Correct Answer: D — Color of the reactants
Learn More →
Q. Which of the following factors does NOT affect the rate of adsorption?
A.
Surface area of adsorbent
B.
Temperature
C.
Pressure of gas
D.
Color of adsorbent
Show solution
Solution
The color of the adsorbent does not affect the rate of adsorption.
Correct Answer: D — Color of adsorbent
Learn More →
Q. Which of the following factors does NOT affect the rate of diffusion of a gas?
A.
Molar mass
B.
Temperature
C.
Pressure
D.
Volume of the container
Show solution
Solution
The volume of the container does not affect the rate of diffusion of a gas; it is primarily affected by molar mass, temperature, and pressure.
Correct Answer: D — Volume of the container
Learn More →
Q. Which of the following factors does NOT affect the solubility of a gas in a liquid?
A.
Temperature
B.
Pressure
C.
Nature of solute
D.
Volume of solvent
Show solution
Solution
The volume of solvent does not directly affect the solubility of a gas; pressure and temperature do.
Correct Answer: D — Volume of solvent
Learn More →
Q. Which of the following factors does NOT affect the vapor pressure of a liquid?
A.
Temperature
B.
Nature of the liquid
C.
Surface area
D.
Presence of impurities
Show solution
Solution
Surface area does not significantly affect the vapor pressure of a liquid.
Correct Answer: C — Surface area
Learn More →
Q. Which of the following factors does NOT affect the vapor pressure of a solution according to Raoult's Law?
A.
Nature of the solute
B.
Temperature
C.
Mole fraction of the solvent
D.
Pressure of the system
Show solution
Solution
Raoult's Law states that the vapor pressure is affected by the nature of the solute, temperature, and mole fraction of the solvent, but not by the pressure of the system.
Correct Answer: D — Pressure of the system
Learn More →
Q. Which of the following factors does NOT affect the viscosity of a liquid?
A.
Temperature
B.
Molecular weight
C.
Pressure
D.
Surface area
Show solution
Solution
Surface area does not significantly affect the viscosity of a liquid.
Correct Answer: D — Surface area
Learn More →
Q. Which of the following gases behaves most ideally under standard conditions?
A.
NH3
B.
CO2
C.
He
D.
H2O
Show solution
Solution
Helium (He) behaves most ideally under standard conditions due to its low intermolecular forces.
Correct Answer: C — He
Learn More →
Q. Which of the following gases has the highest density at STP?
Show solution
Solution
CO2 has the highest density at STP among the given gases.
Correct Answer: D — CO2
Learn More →
Q. Which of the following gases has the highest rate of diffusion at the same temperature?
Show solution
Solution
According to Graham's law, lighter gases diffuse faster; H2 has the lowest molar mass.
Correct Answer: D — H2
Learn More →
Q. Which of the following gases is most likely to behave ideally?
A.
NH3
B.
H2O
C.
He
D.
CO2
Show solution
Solution
Helium (He) behaves most ideally due to its small size and weak intermolecular forces.
Correct Answer: C — He
Learn More →
Q. Which of the following gases is most soluble in water?
Show solution
Solution
CO2 is more soluble in water compared to O2, N2, and H2 due to its ability to form carbonic acid.
Correct Answer: C — CO2
Learn More →
Q. Which of the following gases is primarily responsible for the greenhouse effect?
A.
Ozone
B.
Carbon Dioxide
C.
Nitrogen
D.
Methane
Show solution
Solution
Carbon Dioxide is a major greenhouse gas that traps heat in the atmosphere, contributing to global warming.
Correct Answer: B — Carbon Dioxide
Learn More →
Q. Which of the following gases is produced when aluminum reacts with hydrochloric acid?
A.
Hydrogen
B.
Oxygen
C.
Chlorine
D.
Nitrogen
Show solution
Solution
Hydrogen gas is produced when aluminum reacts with hydrochloric acid.
Correct Answer: A — Hydrogen
Learn More →
Q. Which of the following gases will diffuse the fastest under identical conditions?
Show solution
Solution
According to Graham's law of effusion, lighter gases diffuse faster; hence, He will diffuse the fastest.
Correct Answer: A — He
Learn More →
Q. Which of the following gases will have the highest rate of diffusion at a given temperature?
Show solution
Solution
According to Graham's law of effusion, lighter gases diffuse faster; H2 has the lowest molar mass and will diffuse the fastest.
Correct Answer: D — H2
Learn More →
Q. Which of the following gases will have the highest rate of diffusion at the same temperature?
Show solution
Solution
According to Graham's law, lighter gases diffuse faster. H2 has the lowest molar mass.
Correct Answer: D — H2
Learn More →
Q. Which of the following gases would have the highest rate of diffusion at a given temperature?
Show solution
Solution
Hydrogen (H2) has the lowest molar mass and thus the highest rate of diffusion according to Graham's law.
Correct Answer: D — H2
Learn More →
Q. Which of the following groups exhibits a -I effect?
A.
-OH
B.
-NO2
C.
-CH3
D.
-Cl
Show solution
Solution
The -NO2 group is a strong electron-withdrawing group that exhibits a -I effect.
Correct Answer: B — -NO2
Learn More →
Q. Which of the following groups exhibits a strong +M effect?
A.
-NO2
B.
-OH
C.
-CN
D.
-COOH
Show solution
Solution
The -OH group exhibits a strong +M effect due to its ability to donate electron density through resonance.
Correct Answer: B — -OH
Learn More →
Q. Which of the following groups exhibits a strong -I effect?
A.
–NO2
B.
–CH3
C.
–OH
D.
–NH2
Show solution
Solution
The –NO2 group is a strong electron-withdrawing group and exhibits a strong -I effect.
Correct Answer: A — –NO2
Learn More →
Q. Which of the following groups has a -I effect?
A.
-NH2
B.
-F
C.
-OCH3
D.
-C2H5
Show solution
Solution
-F exhibits a -I effect as it withdraws electron density from the rest of the molecule.
Correct Answer: B — -F
Learn More →
Q. Which of the following groups has both +M and -I effects?
A.
-NH2
B.
-NO2
C.
-COOH
D.
-F
Show solution
Solution
The -NH2 group has a +M effect due to resonance donation and a -I effect due to its electronegativity.
Correct Answer: A — -NH2
Learn More →
Q. Which of the following groups has the strongest -I effect?
A.
-F
B.
-Cl
C.
-Br
D.
-I
Show solution
Solution
-F has the strongest -I effect due to its high electronegativity.
Correct Answer: A — -F
Learn More →
Showing 1951 to 1980 of 2802 (94 Pages)