Q. Which chemical is commonly found in household bleach?
A.
Hydrogen peroxide
B.
Sodium hypochlorite
C.
Ammonium hydroxide
D.
Calcium hypochlorite
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Solution
Sodium hypochlorite is the active ingredient in most household bleach products.
Correct Answer: B — Sodium hypochlorite
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Q. Which chemical is commonly used as a food preservative?
A.
Sodium chloride
B.
Sodium benzoate
C.
Vinegar
D.
Sugar
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Solution
Sodium benzoate is a widely used food preservative that inhibits the growth of bacteria and fungi.
Correct Answer: B — Sodium benzoate
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Q. Which chemical is commonly used to treat drinking water?
A.
Chlorine
B.
Fluoride
C.
Sodium bicarbonate
D.
Sulfuric acid
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Solution
Chlorine is commonly used to disinfect drinking water and kill harmful bacteria.
Correct Answer: A — Chlorine
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Q. Which chemical is primarily responsible for ozone depletion?
A.
Carbon Dioxide
B.
Chlorofluorocarbons (CFCs)
C.
Methane
D.
Sulfur Dioxide
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Solution
Chlorofluorocarbons (CFCs) are primarily responsible for ozone depletion in the stratosphere.
Correct Answer: B — Chlorofluorocarbons (CFCs)
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Q. Which chemical is primarily responsible for the depletion of the ozone layer?
A.
Carbon Dioxide
B.
Chlorofluorocarbons (CFCs)
C.
Methane
D.
Sulfur Dioxide
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Solution
Chlorofluorocarbons (CFCs) are responsible for the depletion of the ozone layer, as they release chlorine atoms that destroy ozone molecules.
Correct Answer: B — Chlorofluorocarbons (CFCs)
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Q. Which colligative property can be used to determine the molar mass of a solute?
A.
Vapor pressure lowering
B.
Boiling point elevation
C.
Freezing point depression
D.
All of the above
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Solution
All of these colligative properties can be used to determine the molar mass of a solute.
Correct Answer: D — All of the above
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Q. Which colligative property is affected by the presence of electrolytes?
A.
Vapor pressure lowering
B.
Boiling point elevation
C.
Freezing point depression
D.
All of the above
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Solution
Electrolytes dissociate into ions, affecting all colligative properties by increasing the number of solute particles.
Correct Answer: D — All of the above
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Q. Which colligative property is used to determine molar mass of a solute?
A.
Boiling point elevation
B.
Freezing point depression
C.
Osmotic pressure
D.
All of the above
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Solution
All of these colligative properties can be used to determine the molar mass of a solute by applying the appropriate formulas.
Correct Answer: D — All of the above
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Q. Which colligative property is used to determine the molar mass of a solute?
A.
Boiling point elevation
B.
Freezing point depression
C.
Osmotic pressure
D.
All of the above
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Solution
All of the listed colligative properties can be used to determine the molar mass of a solute.
Correct Answer: D — All of the above
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Q. Which compound can exhibit both structural and geometric isomerism?
A.
C2H4
B.
C4H8
C.
C5H10
D.
C3H6
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Solution
C4H8 can exhibit both structural isomerism (different structures) and geometric isomerism (cis/trans forms).
Correct Answer: B — C4H8
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Q. Which compound does NOT exhibit optical isomerism?
A.
Lactic acid
B.
Glucose
C.
2-butanol
D.
Butan-2-one
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Solution
Butan-2-one does not have a chiral center and therefore does not exhibit optical isomerism.
Correct Answer: D — Butan-2-one
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Q. Which compound exhibits optical isomerism?
A.
2-butanol
B.
1-butanol
C.
Cyclohexane
D.
Ethylene
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Solution
2-butanol has a chiral center and can exist as two enantiomers, thus exhibiting optical isomerism.
Correct Answer: A — 2-butanol
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Q. Which compound is commonly used as a preservative in food?
A.
Sodium chloride
B.
Sodium benzoate
C.
Potassium nitrate
D.
Calcium carbonate
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Solution
Sodium benzoate is widely used as a food preservative to prevent spoilage.
Correct Answer: B — Sodium benzoate
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Q. Which device utilizes the p-n junction principle?
A.
Resistor
B.
Capacitor
C.
Diode
D.
Inductor
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Solution
A diode is a semiconductor device that utilizes the p-n junction principle to allow current to flow in one direction.
Correct Answer: C — Diode
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Q. Which element has the electronic configuration 1s2 2s2 2p6 3s2 3p1?
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Solution
The element with the configuration 1s2 2s2 2p6 3s2 3p1 is Aluminum (Al).
Correct Answer: A — Al
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Q. Which element has the electronic configuration 1s2 2s2 2p6 3s2 3p6 4s2?
A.
Arsenic
B.
Calcium
C.
Krypton
D.
Titanium
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Solution
The configuration corresponds to Krypton (Kr), which has 36 electrons.
Correct Answer: C — Krypton
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Q. Which enzyme breaks down starch into glucose?
A.
Amylase
B.
Lactase
C.
Sucrase
D.
Cellulase
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Solution
Amylase is the enzyme that catalyzes the hydrolysis of starch into glucose.
Correct Answer: A — Amylase
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Q. Which enzyme is responsible for the hydrolysis of starch?
A.
Amylase
B.
Cellulase
C.
Lactase
D.
Maltase
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Solution
Amylase is the enzyme that catalyzes the hydrolysis of starch into sugars.
Correct Answer: A — Amylase
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Q. Which equation is used to calculate the viscosity of a fluid in a capillary tube?
A.
Bernoulli's equation
B.
Poiseuille's law
C.
Navier-Stokes equation
D.
Continuity equation
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Solution
Poiseuille's law is used to calculate the viscosity of a fluid in a capillary tube.
Correct Answer: B — Poiseuille's law
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Q. Which equation is used to calculate the viscosity of a fluid in a pipe?
A.
Bernoulli's equation
B.
Poiseuille's law
C.
Continuity equation
D.
Navier-Stokes equation
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Solution
Poiseuille's law is used to calculate the viscosity of a fluid in a pipe.
Correct Answer: B — Poiseuille's law
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Q. Which equation relates the viscosity of a fluid to the flow rate in a capillary tube?
A.
Bernoulli's equation
B.
Poiseuille's law
C.
Continuity equation
D.
Ideal gas law
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Solution
Poiseuille's law describes the flow of a viscous fluid through a capillary tube and relates viscosity to flow rate.
Correct Answer: B — Poiseuille's law
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Q. Which f-block element is known for its use in nuclear reactors?
A.
Thorium
B.
Cerium
C.
Neodymium
D.
Gadolinium
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Solution
Thorium (Th) is used in nuclear reactors due to its ability to breed fissile uranium-233.
Correct Answer: A — Thorium
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Q. Which factor does NOT affect the Gibbs Free Energy of a reaction?
A.
Temperature
B.
Pressure
C.
Concentration of reactants
D.
Nature of the solvent
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Solution
The nature of the solvent does not directly affect the Gibbs Free Energy of a reaction; it is primarily influenced by temperature, pressure, and concentration.
Correct Answer: D — Nature of the solvent
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Q. Which factor does NOT affect the Gibbs Free Energy of a system?
A.
Temperature
B.
Pressure
C.
Concentration of reactants
D.
Nature of the solvent
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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
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Q. Which functional group is present in alcohols?
A.
Aldehyde
B.
Hydroxyl
C.
Carboxyl
D.
Amine
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Solution
Alcohols contain a hydroxyl (-OH) functional group.
Correct Answer: B — Hydroxyl
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Q. Which gas has the highest density at the same temperature and pressure?
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Solution
CO2 has the highest density among the given gases at the same temperature and pressure.
Correct Answer: D — CO2
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Q. Which gas has the highest rate of diffusion at a given temperature?
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Solution
Helium (He) has the highest rate of diffusion due to its low molar mass.
Correct Answer: C — He
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Q. Which gas is primarily responsible for the depletion of the ozone layer?
A.
Carbon Dioxide
B.
Chlorofluorocarbons
C.
Methane
D.
Nitrous Oxide
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Solution
Chlorofluorocarbons (CFCs) are primarily responsible for the depletion of the ozone layer.
Correct Answer: B — Chlorofluorocarbons
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Q. Which gas is primarily responsible for the greenhouse effect?
A.
Oxygen
B.
Nitrogen
C.
Carbon Dioxide
D.
Hydrogen
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Solution
Carbon Dioxide (CO2) is primarily responsible for the greenhouse effect, trapping heat in the atmosphere.
Correct Answer: C — Carbon Dioxide
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Q. Which gas is produced during the reaction of an acid with a carbonate?
A.
Oxygen
B.
Hydrogen
C.
Carbon dioxide
D.
Nitrogen
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Solution
The reaction of an acid with a carbonate produces carbon dioxide gas.
Correct Answer: C — Carbon dioxide
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