Q. What is the primary reason for the compressibility of gases?
A.
High density
B.
Low temperature
C.
Large intermolecular spaces
D.
Strong intermolecular forces
Show solution
Solution
Gases are highly compressible due to large intermolecular spaces between particles.
Correct Answer: C — Large intermolecular spaces
Learn More →
Q. What is the primary reason for the elevation of boiling point in a solution?
A.
Increased molecular weight
B.
Decreased vapor pressure
C.
Increased solubility
D.
Decreased temperature
Show solution
Solution
The elevation of boiling point occurs because the presence of solute lowers the vapor pressure of the solvent, requiring a higher temperature to reach boiling.
Correct Answer: B — Decreased vapor pressure
Learn More →
Q. What is the primary reason for the formation of a precipitate in a saturated solution?
A.
Excess solute
B.
Temperature increase
C.
Change in pH
D.
Decrease in solubility product
Show solution
Solution
A precipitate forms when the ionic product exceeds the solubility product (Ksp) of the salt.
Correct Answer: D — Decrease in solubility product
Learn More →
Q. What is the primary reason for the high boiling point of water compared to other similar-sized molecules?
A.
Hydrogen bonding
B.
Van der Waals forces
C.
Ionic bonding
D.
Covalent bonding
Show solution
Solution
The high boiling point of water is primarily due to hydrogen bonding between water molecules.
Correct Answer: A — Hydrogen bonding
Learn More →
Q. What is the primary reason for the high reactivity of alkali metals?
A.
High electronegativity
B.
Low ionization energy
C.
High atomic radius
D.
Presence of d-orbitals
Show solution
Solution
Alkali metals have low ionization energy, which contributes to their high reactivity.
Correct Answer: B — Low ionization energy
Learn More →
Q. What is the primary reason for the high reactivity of halogens?
A.
Low electronegativity
B.
High ionization energy
C.
Desire to gain one electron
D.
Large atomic size
Show solution
Solution
Halogens are highly reactive because they have a strong desire to gain one electron to achieve a stable octet.
Correct Answer: C — Desire to gain one electron
Learn More →
Q. What is the primary reason for the increase in pH when a weak acid is titrated with a strong base?
A.
Formation of water
B.
Neutralization of acid
C.
Formation of a conjugate base
D.
All of the above
Show solution
Solution
All of the above factors contribute to the increase in pH during the titration of a weak acid with a strong base.
Correct Answer: D — All of the above
Learn More →
Q. What is the primary reason for the increasing reactivity of alkali metals down the group?
A.
Increasing atomic size
B.
Decreasing ionization energy
C.
Increasing electronegativity
D.
Increasing metallic character
Show solution
Solution
The reactivity of alkali metals increases down the group due to decreasing ionization energy.
Correct Answer: B — Decreasing ionization energy
Learn More →
Q. What is the primary reason for the lowering of vapor pressure in a solution?
A.
Increased temperature
B.
Decreased surface area
C.
Presence of solute particles
D.
Increased molecular weight of solvent
Show solution
Solution
The presence of solute particles reduces the number of solvent molecules at the surface, leading to a lower vapor pressure.
Correct Answer: C — Presence of solute particles
Learn More →
Q. What is the primary reason for the stability of benzene?
A.
Presence of double bonds
B.
Resonance stabilization
C.
High molecular weight
D.
Hydrogen bonding
Show solution
Solution
Benzene's stability arises from resonance stabilization, where the electrons are delocalized over the entire ring structure.
Correct Answer: B — Resonance stabilization
Learn More →
Q. What is the primary reason for the stability of phenol compared to cyclohexanol?
A.
Inductive effect
B.
Mesomeric effect
C.
Steric hindrance
D.
Hydrogen bonding
Show solution
Solution
Phenol is stabilized by resonance (mesomeric effect) which is not present in cyclohexanol.
Correct Answer: B — Mesomeric effect
Learn More →
Q. What is the primary reason gases can be compressed much 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 due to large intermolecular spaces between particles, unlike liquids and solids.
Correct Answer: C — Large intermolecular spaces
Learn More →
Q. What is the primary species present in a solution of acetic acid (CH3COOH)?
A.
CH3COO-
B.
H+
C.
CH3COOH
D.
H2O
Show solution
Solution
In a solution of acetic acid, the primary species present is the undissociated acetic acid (CH3COOH), along with some dissociated ions.
Correct Answer: C — CH3COOH
Learn More →
Q. What is the primary species present in a solution of sodium acetate (CH3COONa)?
A.
CH3COO-
B.
Na+
C.
H+
D.
OH-
Show solution
Solution
In a solution of sodium acetate, the acetate ion (CH3COO-) is the primary species that affects the pH.
Correct Answer: A — CH3COO-
Learn More →
Q. What is the primary storage form of carbohydrates in animals?
A.
Starch
B.
Glycogen
C.
Cellulose
D.
Chitin
Show solution
Solution
Glycogen is the primary storage form of carbohydrates in animals.
Correct Answer: B — Glycogen
Learn More →
Q. What is the primary structural component of plant cell walls?
A.
Starch
B.
Glycogen
C.
Cellulose
D.
Chitin
Show solution
Solution
Cellulose is the primary structural component of plant cell walls, providing rigidity and strength.
Correct Answer: C — Cellulose
Learn More →
Q. What is the primary structure of a polymer determined by?
A.
The arrangement of monomers
B.
The molecular weight
C.
The type of bonds
D.
The color of the polymer
Show solution
Solution
The primary structure of a polymer is determined by the arrangement of its monomers.
Correct Answer: A — The arrangement of monomers
Learn More →
Q. What is the primary structure of a protein determined by?
A.
Hydrogen bonds
B.
Ionic bonds
C.
Peptide bonds
D.
Disulfide bridges
Show solution
Solution
The primary structure of a protein is determined by the sequence of amino acids linked by peptide bonds.
Correct Answer: C — Peptide bonds
Learn More →
Q. What is the primary structure of a protein?
A.
The sequence of amino acids
B.
The folding of the polypeptide chain
C.
The arrangement of multiple polypeptide chains
D.
The interaction between side chains
Show solution
Solution
The primary structure of a protein refers to the linear sequence of amino acids in the polypeptide chain.
Correct Answer: A — The sequence of amino acids
Learn More →
Q. What is the primary type of bonding in diamond?
A.
Ionic
B.
Covalent
C.
Metallic
D.
Hydrogen
Show solution
Solution
Diamond consists of a three-dimensional network of covalent bonds between carbon atoms.
Correct Answer: B — Covalent
Learn More →
Q. What is the primary type of bonding in ionic compounds?
A.
Covalent bonding
B.
Ionic bonding
C.
Metallic bonding
D.
Hydrogen bonding
Show solution
Solution
Ionic compounds are primarily held together by ionic bonding.
Correct Answer: B — Ionic bonding
Learn More →
Q. What is the primary type of bonding in polymers?
A.
Ionic bonding
B.
Covalent bonding
C.
Metallic bonding
D.
Hydrogen bonding
Show solution
Solution
Covalent bonding is the primary type of bonding in polymers, linking monomers together.
Correct Answer: B — Covalent bonding
Learn More →
Q. What is the primary type of bonding in sodium chloride (NaCl)?
A.
Covalent
B.
Ionic
C.
Metallic
D.
Hydrogen
Show solution
Solution
Sodium chloride is primarily held together by ionic bonds formed between Na+ and Cl- ions.
Correct Answer: B — Ionic
Learn More →
Q. What is the primary type of reaction that alkanes undergo?
A.
Addition
B.
Substitution
C.
Elimination
D.
Condensation
Show solution
Solution
Alkanes primarily undergo substitution reactions.
Correct Answer: B — Substitution
Learn More →
Q. What is the primary use of amines in industry?
A.
Solvents
B.
Fertilizers
C.
Dyes
D.
All of the above
Show solution
Solution
Amines are used in various industries for solvents, fertilizers, dyes, and more.
Correct Answer: D — All of the above
Learn More →
Q. What is the primary use of antihistamines?
A.
To treat infections
B.
To relieve allergy symptoms
C.
To reduce fever
D.
To promote sleep
Show solution
Solution
Antihistamines are primarily used to relieve symptoms of allergies.
Correct Answer: B — To relieve allergy symptoms
Learn More →
Q. What is the primary use of baking soda in cooking?
A.
Flavor enhancer
B.
Leavening agent
C.
Preservative
D.
Coloring agent
Show solution
Solution
Baking soda acts as a leavening agent, helping baked goods rise by producing carbon dioxide when reacting with acids.
Correct Answer: B — Leavening agent
Learn More →
Q. What is the primary use of barium sulfate?
A.
As a contrast agent in X-ray imaging
B.
In fireworks
C.
As a fertilizer
D.
In batteries
Show solution
Solution
Barium sulfate is primarily used as a contrast agent in X-ray imaging.
Correct Answer: A — As a contrast agent in X-ray imaging
Learn More →
Q. What is the primary use of boron in industry?
A.
Fertilizers
B.
Glass production
C.
Metallurgy
D.
Pharmaceuticals
Show solution
Solution
Boron is primarily used in glass production due to its ability to improve thermal and chemical resistance.
Correct Answer: B — Glass production
Learn More →
Q. What is the primary use of calcium in the industry?
A.
As a reducing agent
B.
In the production of cement
C.
In batteries
D.
As a fertilizer
Show solution
Solution
Calcium is primarily used in the production of cement.
Correct Answer: B — In the production of cement
Learn More →
Showing 1231 to 1260 of 2802 (94 Pages)