Q. Which of the following alkynes is the most stable?
-
A.
1-butyne
-
B.
2-butyne
-
C.
1-pentyne
-
D.
3-pentyne
Solution
2-butyne is more stable than 1-butyne due to steric hindrance and hyperconjugation.
Correct Answer: B — 2-butyne
Learn More →
Q. Which of the following alkynes is the simplest?
-
A.
1-butyne
-
B.
2-butyne
-
C.
Ethyne
-
D.
Propyne
Solution
Ethyne (C2H2) is the simplest alkyne.
Correct Answer: C — Ethyne
Learn More →
Q. Which of the following amines can form hydrogen bonds with water?
-
A.
Tertiary amines
-
B.
Primary amines
-
C.
Secondary amines
-
D.
All of the above
Solution
All types of amines can form hydrogen bonds with water due to the presence of the nitrogen atom.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following amines can form hydrogen bonds?
-
A.
Tertiary amine
-
B.
Primary amine
-
C.
Quaternary ammonium
-
D.
None of the above
Solution
Primary amines can form hydrogen bonds due to the presence of a hydrogen atom attached to the nitrogen.
Correct Answer: B — Primary amine
Learn More →
Q. Which of the following amines has the highest boiling point?
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Aniline
-
D.
Dimethylamine
Solution
Aniline has the highest boiling point due to its ability to form strong hydrogen bonds.
Correct Answer: C — Aniline
Learn More →
Q. Which of the following amines is a strong base?
-
A.
Aniline
-
B.
Methylamine
-
C.
Phenethylamine
-
D.
Benzylamine
Solution
Methylamine is a strong base compared to the others due to the lack of resonance stabilization of the lone pair.
Correct Answer: B — Methylamine
Learn More →
Q. Which of the following amines is aromatic?
-
A.
Ethylamine
-
B.
Aniline
-
C.
Trimethylamine
-
D.
Cyclohexylamine
Solution
Aniline is an aromatic amine because it contains a benzene ring.
Correct Answer: B — Aniline
Learn More →
Q. Which of the following amines is least soluble in water?
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Aniline
-
D.
Tert-butylamine
Solution
Tert-butylamine is least soluble in water due to its bulky structure which hinders hydrogen bonding.
Correct Answer: D — Tert-butylamine
Learn More →
Q. Which of the following amines is the most basic?
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Aniline
-
D.
Dimethylamine
Solution
Dimethylamine is the most basic due to the electron-donating effect of the two methyl groups, which increases the electron density on the nitrogen.
Correct Answer: D — Dimethylamine
Learn More →
Q. Which of the following amino acids contains a sulfur atom?
-
A.
Cysteine
-
B.
Serine
-
C.
Glutamine
-
D.
Alanine
Solution
Cysteine is the amino acid that contains a sulfur atom in its side chain, which can form disulfide bonds.
Correct Answer: A — Cysteine
Learn More →
Q. Which of the following amino acids is essential in the human diet?
-
A.
Glycine
-
B.
Alanine
-
C.
Lysine
-
D.
Serine
Solution
Lysine is an essential amino acid that must be obtained through the diet, while glycine, alanine, and serine can be synthesized by the body.
Correct Answer: C — Lysine
Learn More →
Q. Which of the following best describes plasma?
-
A.
A solid with high density
-
B.
A gas with low density
-
C.
An ionized gas
-
D.
A liquid at high temperature
Solution
Plasma is an ionized gas consisting of free electrons and ions, typically found at high temperatures.
Correct Answer: C — An ionized gas
Learn More →
Q. Which of the following best describes the arrangement of particles in a gas?
-
A.
Tightly packed in a fixed position
-
B.
Close together but can move past each other
-
C.
Far apart and moving freely
-
D.
Randomly arranged in a fixed structure
Solution
Gas particles are far apart and move freely, allowing them to fill the container.
Correct Answer: C — Far apart and moving freely
Learn More →
Q. Which of the following best describes the arrangement of particles in a solid?
-
A.
Random and far apart
-
B.
Close together and fixed in place
-
C.
Close together but free to move
-
D.
Random and close together
Solution
In solids, particles are closely packed and fixed in place, giving them a definite shape.
Correct Answer: B — Close together and fixed in place
Learn More →
Q. Which of the following biomolecules is primarily responsible for storing genetic information?
-
A.
Proteins
-
B.
Lipids
-
C.
Carbohydrates
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
Learn More →
Q. Which of the following bonds is the strongest?
-
A.
Single bond
-
B.
Double bond
-
C.
Triple bond
-
D.
All are equal
Solution
Triple bonds are the strongest type of covalent bond due to the presence of three shared electron pairs.
Correct Answer: C — Triple bond
Learn More →
Q. Which of the following carbohydrates is a disaccharide?
-
A.
Maltose
-
B.
Ribose
-
C.
Cellulose
-
D.
Glycogen
Solution
Maltose is a disaccharide formed from two glucose units.
Correct Answer: A — Maltose
Learn More →
Q. Which of the following carbohydrates is a ketose?
-
A.
Glucose
-
B.
Fructose
-
C.
Galactose
-
D.
Mannose
Solution
Fructose is a ketose sugar, while glucose and galactose are aldoses.
Correct Answer: B — Fructose
Learn More →
Q. Which of the following carbohydrates is a reducing sugar?
-
A.
Fructose
-
B.
Sucrose
-
C.
Maltose
-
D.
Cellulose
Solution
Maltose is a reducing sugar because it has a free aldehyde or ketone group, while sucrose does not.
Correct Answer: C — Maltose
Learn More →
Q. Which of the following carbohydrates is not digestible by humans?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Maltose
Solution
Cellulose is not digestible by humans due to the lack of enzymes to break it down.
Correct Answer: C — Cellulose
Learn More →
Q. Which of the following carboxylic acids is a dicarboxylic acid?
-
A.
Acetic acid
-
B.
Oxalic acid
-
C.
Formic acid
-
D.
Butanoic acid
Solution
Oxalic acid is a dicarboxylic acid as it contains two carboxyl groups (-COOH).
Correct Answer: B — Oxalic acid
Learn More →
Q. Which of the following carboxylic acids is a solid at room temperature?
-
A.
Acetic acid
-
B.
Formic acid
-
C.
Stearic acid
-
D.
Propanoic acid
Solution
Stearic acid is a long-chain fatty acid and is solid at room temperature.
Correct Answer: C — Stearic acid
Learn More →
Q. Which of the following changes will increase the yield of products in an exothermic reaction at equilibrium?
-
A.
Increase the temperature
-
B.
Decrease the pressure
-
C.
Increase the concentration of reactants
-
D.
Add a catalyst
Solution
Increasing the concentration of reactants will shift the equilibrium position to the right, favoring the formation of products.
Correct Answer: C — Increase the concentration of reactants
Learn More →
Q. Which of the following changes will NOT affect the position of equilibrium for the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g)?
-
A.
Increasing the concentration of SO2
-
B.
Decreasing the temperature
-
C.
Adding a catalyst
-
D.
Increasing the volume of the container
Solution
A catalyst speeds up the rate of both the forward and reverse reactions equally, thus it does not affect the position of equilibrium.
Correct Answer: C — Adding a catalyst
Learn More →
Q. Which of the following changes will NOT affect the position of equilibrium in a closed system?
-
A.
Adding a catalyst
-
B.
Changing the concentration of reactants
-
C.
Changing the pressure
-
D.
Changing the temperature
Solution
A catalyst speeds up the rate of both the forward and reverse reactions equally, thus it does not change the position of equilibrium.
Correct Answer: A — Adding a catalyst
Learn More →
Q. Which of the following changes will NOT affect the position of equilibrium?
-
A.
Adding a catalyst
-
B.
Changing the concentration of reactants
-
C.
Changing the temperature
-
D.
Changing the pressure
Solution
A catalyst speeds up the rate of reaching equilibrium but does not change the position of equilibrium or the equilibrium constant.
Correct Answer: A — Adding a catalyst
Learn More →
Q. Which of the following changes will shift the equilibrium to the right for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)?
-
A.
Increase in pressure
-
B.
Decrease in temperature
-
C.
Increase in volume
-
D.
Addition of NH3
Solution
Increasing pressure shifts the equilibrium to the side with fewer moles of gas, which is the right side in this case.
Correct Answer: A — Increase in pressure
Learn More →
Q. Which of the following colligative properties is affected by the number of solute particles in a solution?
-
A.
Vapor pressure lowering
-
B.
Density
-
C.
Color
-
D.
Viscosity
Solution
Vapor pressure lowering is a colligative property that depends on the number of solute particles in a solution.
Correct Answer: A — Vapor pressure lowering
Learn More →
Q. Which of the following colligative properties is used to determine molar mass?
-
A.
Boiling point elevation
-
B.
Freezing point depression
-
C.
Osmotic pressure
-
D.
All of the above
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
Learn More →
Q. Which of the following colligative properties is used to determine the molar mass of a solute?
-
A.
Vapor pressure lowering
-
B.
Boiling point elevation
-
C.
Freezing point depression
-
D.
Osmotic pressure
Solution
Freezing point depression can be used to determine the molar mass of a solute by measuring the decrease in freezing point.
Correct Answer: C — Freezing point depression
Learn More →
Showing 1741 to 1770 of 2802 (94 Pages)