Chemistry
Q. What is the primary reason for the high compressibility of gases?
A.
Large intermolecular spaces
B.
Strong intermolecular forces
C.
Low temperature
D.
High pressure
Show solution
Solution
Gases are highly compressible due to large intermolecular spaces between particles.
Correct Answer: A — Large intermolecular spaces
Learn More →
Q. What is the primary reason for the high electronegativity of halogens? (2020)
A.
Large atomic size
B.
High ionization energy
C.
Low electron affinity
D.
High atomic mass
Show solution
Solution
Halogens have high electronegativity due to their high ionization energy, which allows them to attract electrons effectively.
Correct Answer: B — High ionization energy
Learn More →
Q. What is the primary reason for the variable oxidation states of transition metals?
A.
Presence of d-electrons
B.
High atomic mass
C.
Low ionization energy
D.
High electronegativity
Show solution
Solution
The presence of d-electrons allows transition metals to exhibit variable oxidation states.
Correct Answer: A — Presence of d-electrons
Learn More →
Q. What is the primary reason that gases can be compressed more than liquids or solids?
A.
High density
B.
Low density
C.
Large intermolecular spaces
D.
Strong intermolecular forces
Show solution
Solution
Gases can be compressed more than liquids or solids because they have large intermolecular spaces.
Correct Answer: C — Large intermolecular spaces
Learn More →
Q. What is the primary use of boron in industry? (2019) 2019
A.
Fertilizers
B.
Glass production
C.
Metallurgy
D.
Pharmaceuticals
Show solution
Solution
Boron is primarily used in the production of glass and ceramics.
Correct Answer: B — Glass production
Learn More →
Q. What is the primary use of polyethylene?
A.
Insulation
B.
Packaging
C.
Textiles
D.
Adhesives
Show solution
Solution
Polyethylene is primarily used in packaging due to its flexibility and durability.
Correct Answer: B — Packaging
Learn More →
Q. What is the primary use of polystyrene?
A.
Insulation
B.
Packaging
C.
Textiles
D.
Adhesives
Show solution
Solution
Polystyrene is widely used in packaging materials due to its lightweight and cushioning properties.
Correct Answer: B — Packaging
Learn More →
Q. What is the primary use of sulfuric acid (H2SO4)? (2022)
A.
Fertilizer
B.
Battery acid
C.
Detergent
D.
Food preservative
Show solution
Solution
Sulfuric acid is primarily used as battery acid in lead-acid batteries.
Correct Answer: B — Battery acid
Learn More →
Q. What is the principal quantum number for the outermost electron in sodium (Na)? (2022) 2022
Show solution
Solution
Sodium has an atomic number of 11, and its outermost electron is in the 3rd shell, so n=3.
Correct Answer: C — 3
Learn More →
Q. What is the principal quantum number for the outermost electrons in sodium (Na)? (2023) 2023
Show solution
Solution
Sodium has the electronic configuration of 1s² 2s² 2p⁶ 3s¹, so the principal quantum number for the outermost electrons is 3.
Correct Answer: C — 3
Learn More →
Q. What is the process of a solid turning directly into a gas called? (2021)
A.
Condensation
B.
Sublimation
C.
Evaporation
D.
Deposition
Show solution
Solution
The process of a solid turning directly into a gas is called sublimation.
Correct Answer: B — Sublimation
Learn More →
Q. What is the process of forming a polymer from monomers called?
A.
Polymerization
B.
Condensation
C.
Sublimation
D.
Depolymerization
Show solution
Solution
The process of forming a polymer from monomers is called polymerization.
Correct Answer: A — Polymerization
Learn More →
Q. What is the product of electrolysis of water?
A.
Hydrogen and Oxygen
B.
Hydrogen and Carbon
C.
Oxygen and Nitrogen
D.
Hydrogen and Chlorine
Show solution
Solution
The products of electrolysis of water are hydrogen and oxygen.
Correct Answer: A — Hydrogen and Oxygen
Learn More →
Q. What is the product of the complete combustion of propane?
A.
CO2 and H2O
B.
CO and H2O
C.
C and H2
D.
C2H4
Show solution
Solution
The complete combustion of propane produces carbon dioxide (CO2) and water (H2O).
Correct Answer: A — CO2 and H2O
Learn More →
Q. What is the product of the oxidation of 2-Propanol? (2022)
A.
Acetone
B.
Ethanol
C.
Propanoic acid
D.
Methanol
Show solution
Solution
2-Propanol oxidizes to form Acetone, which is a ketone.
Correct Answer: A — Acetone
Learn More →
Q. What is the product of the oxidation of a primary alcohol? (2020) 2020
A.
Aldehyde
B.
Ketone
C.
Carboxylic acid
D.
Alkene
Show solution
Solution
The oxidation of a primary alcohol first produces an aldehyde, which can further oxidize to a carboxylic acid.
Correct Answer: A — Aldehyde
Learn More →
Q. What is the product of the oxidation of a primary alcohol? (2023) 2023
A.
Aldehyde
B.
Ketone
C.
Carboxylic acid
D.
Alkane
Show solution
Solution
The oxidation of a primary alcohol results in the formation of an aldehyde.
Correct Answer: A — Aldehyde
Learn More →
Q. What is the product of the oxidation of ethanol?
A.
Acetic acid
B.
Methanol
C.
Butanoic acid
D.
Propanoic acid
Show solution
Solution
Ethanol oxidizes to acetic acid when reacted with an oxidizing agent.
Correct Answer: A — Acetic acid
Learn More →
Q. What is the product of the oxidation of propan-2-ol?
A.
Propanal
B.
Acetone
C.
Propanoic acid
D.
Butan-2-one
Show solution
Solution
Propan-2-ol oxidizes to form Acetone (CH3COCH3).
Correct Answer: B — Acetone
Learn More →
Q. What is the product of the reaction between 1-bromobutane and sodium hydroxide in ethanol? (2021)
A.
Butanol
B.
Butyl bromide
C.
Butyl ether
D.
Butyric acid
Show solution
Solution
The reaction of 1-bromobutane with sodium hydroxide in ethanol leads to the formation of butanol through nucleophilic substitution.
Correct Answer: A — Butanol
Learn More →
Q. What is the product of the reaction between 1-bromopropane and sodium hydroxide in ethanol?
A.
Propene
B.
1-Propanol
C.
2-Propanol
D.
No reaction
Show solution
Solution
1-bromopropane reacts with sodium hydroxide in ethanol to form 1-Propanol via nucleophilic substitution.
Correct Answer: B — 1-Propanol
Learn More →
Q. What is the product of the reaction between ammonia and ethyl bromide?
A.
Ethylamine
B.
Diethylamine
C.
Triethylamine
D.
Ammonium bromide
Show solution
Solution
The reaction produces Ethylamine as ammonia acts as a nucleophile and replaces the bromine atom.
Correct Answer: A — Ethylamine
Learn More →
Q. What is the product of the reaction between an amine and an acid?
A.
Amide
B.
Salt
C.
Ester
D.
Alcohol
Show solution
Solution
The reaction between an amine and an acid produces a salt, as the amine acts as a base and accepts a proton from the acid.
Correct Answer: B — Salt
Learn More →
Q. What is the product of the reaction between benzaldehyde and phenylmagnesium bromide?
A.
Benzyl alcohol
B.
Benzophenone
C.
Diphenylmethanol
D.
Benzene
Show solution
Solution
The reaction produces Diphenylmethanol when benzaldehyde reacts with phenylmagnesium bromide.
Correct Answer: C — Diphenylmethanol
Learn More →
Q. What is the product of the reduction of Cr2O7^2- in acidic medium?
A.
CrO4^2-
B.
Cr^3+
C.
CrO3
D.
CrO2
Show solution
Solution
In acidic medium, Cr2O7^2- is reduced to Cr^3+.
Correct Answer: B — Cr^3+
Learn More →
Q. What is the rate constant of a first-order reaction if the half-life is 10 minutes? (2021)
A.
0.0693 min⁻¹
B.
0.1 min⁻¹
C.
0.693 min⁻¹
D.
0.5 min⁻¹
Show solution
Solution
For a first-order reaction, k = 0.693 / t₁/₂. Here, t₁/₂ = 10 min, so k = 0.693 / 10 = 0.0693 min⁻¹.
Correct Answer: A — 0.0693 min⁻¹
Learn More →
Q. What is the rate law expression for a reaction that is first order with respect to A and second order with respect to B? (2022)
A.
Rate = k[A][B]^2
B.
Rate = k[A]^2[B]
C.
Rate = k[A]^2[B]^2
D.
Rate = k[A][B]
Show solution
Solution
The rate law for a reaction is determined by the order with respect to each reactant. For a first order with respect to A and second order with respect to B, the rate law is Rate = k[A][B]^2.
Correct Answer: A — Rate = k[A][B]^2
Learn More →
Q. What is the rate law expression for a reaction that is second order with respect to reactant A? (2023)
A.
Rate = k[A]
B.
Rate = k[A]^2
C.
Rate = k[A]^2[B]
D.
Rate = k[A][B]
Show solution
Solution
For a second order reaction with respect to A, the rate law is expressed as Rate = k[A]^2.
Correct Answer: B — Rate = k[A]^2
Learn More →
Q. What is the rate law for a reaction that is first order with respect to A and second order with respect to B? (2022) 2022
A.
Rate = k[A][B]^2
B.
Rate = k[A]^2[B]
C.
Rate = k[A]^2[B]^2
D.
Rate = k[A][B]
Show solution
Solution
The rate law is determined by the order of the reaction with respect to each reactant. For first order in A and second order in B, the rate law is Rate = k[A][B]^2.
Correct Answer: A — Rate = k[A][B]^2
Learn More →
Q. What is the reduction potential of the half-reaction 2H⁺ + 2e⁻ → H₂?
A.
0.00 V
B.
0.34 V
C.
0.76 V
D.
1.23 V
Show solution
Solution
The standard reduction potential for 2H⁺ + 2e⁻ → H₂ is 0.00 V.
Correct Answer: D — 1.23 V
Learn More →
Showing 301 to 330 of 559 (19 Pages)