Engineering Entrance
Q. What type of reaction occurs when haloalkanes react with nucleophiles? (2020)
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A.
Elimination
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B.
Substitution
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C.
Addition
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D.
Redox
Solution
Haloalkanes typically undergo nucleophilic substitution reactions where the halogen is replaced by a nucleophile.
Correct Answer: B — Substitution
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Q. What type of structure do most natural polymers have?
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A.
Linear
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B.
Branched
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C.
Cross-linked
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D.
Network
Solution
Most natural polymers, like cellulose, have a linear structure.
Correct Answer: A — Linear
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Q. What type of sugar is ribose?
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A.
Monosaccharide
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B.
Disaccharide
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C.
Polysaccharide
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D.
Oligosaccharide
Solution
Ribose is a monosaccharide, a simple sugar that is a component of RNA.
Correct Answer: A — Monosaccharide
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Q. Which alcohol is commonly known as rubbing alcohol?
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A.
Ethanol
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B.
Isopropanol
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C.
Methanol
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D.
Butanol
Solution
Isopropanol, or 2-Propanol, is commonly referred to as rubbing alcohol.
Correct Answer: B — Isopropanol
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Q. Which alcohol is used as an antifreeze agent? (2022)
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A.
Ethanol
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B.
Methanol
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C.
Isopropanol
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D.
Butanol
Solution
Methanol is commonly used as an antifreeze agent due to its low freezing point.
Correct Answer: B — Methanol
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Q. Which alcohol is used as an antifreeze? (2022)
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A.
Methanol
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B.
Ethanol
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C.
Isopropanol
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D.
Butanol
Solution
Methanol is commonly used as an antifreeze due to its low freezing point.
Correct Answer: A — Methanol
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Q. Which amine is a strong base due to steric hindrance? (2022)
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A.
Methylamine
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B.
Ethylamine
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C.
Tert-butylamine
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D.
Aniline
Solution
Tert-butylamine is a strong base due to steric hindrance that prevents protonation, making it more stable.
Correct Answer: C — Tert-butylamine
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Q. Which amine is known for its fishy odor?
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A.
Methylamine
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B.
Ethylamine
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C.
Trimethylamine
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D.
Aniline
Solution
Trimethylamine is known for its strong fishy odor, often associated with decaying fish.
Correct Answer: C — Trimethylamine
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Q. Which amine is used in the preparation of dyes?
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A.
Aniline
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B.
Methylamine
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C.
Dimethylamine
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D.
Ethylamine
Solution
Aniline is widely used in the preparation of dyes due to its reactivity.
Correct Answer: A — Aniline
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Q. Which biomolecule is known for its role in catalyzing biochemical reactions?
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A.
Nucleic Acids
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B.
Carbohydrates
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C.
Proteins
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D.
Lipids
Solution
Proteins, specifically enzymes, are known for their role in catalyzing biochemical reactions.
Correct Answer: C — Proteins
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Q. Which biomolecule is primarily involved in the structure of cell membranes?
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A.
Proteins
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B.
Carbohydrates
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C.
Nucleic Acids
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D.
Phospholipids
Solution
Phospholipids are the main components of cell membranes, forming a bilayer.
Correct Answer: D — Phospholipids
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Q. Which biomolecule is primarily responsible for genetic information? (2023)
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A.
Carbohydrates
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B.
Proteins
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C.
Lipids
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D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, store and transmit genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily responsible for storing genetic information? (2023) 2023
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A.
Proteins
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B.
Carbohydrates
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C.
Lipids
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D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily used for energy storage in animals?
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A.
Glycogen
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B.
Cellulose
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C.
Chitin
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D.
Starch
Solution
Glycogen is the primary energy storage molecule in animals.
Correct Answer: A — Glycogen
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Q. Which biomolecule is responsible for storing genetic information? (2023)
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A.
Proteins
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B.
Lipids
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C.
Carbohydrates
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D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is responsible for storing genetic information? (2023) 2023
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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
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Q. Which carboxylic acid has the highest boiling point?
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A.
Formic acid
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B.
Acetic acid
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C.
Propanoic acid
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D.
Butanoic acid
Solution
Butanoic acid has the highest boiling point due to its longer carbon chain.
Correct Answer: D — Butanoic acid
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Q. Which carboxylic acid is commonly known as 'butyric acid'?
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A.
C3H6O2
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B.
C4H8O2
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C.
C5H10O2
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D.
C2H4O2
Solution
Butyric acid has the molecular formula C4H8O2.
Correct Answer: B — C4H8O2
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Q. Which carboxylic acid is commonly known as formic acid?
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A.
Methanoic acid
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B.
Ethanoic acid
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C.
Propanoic acid
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D.
Butanoic acid
Solution
Formic acid is the common name for Methanoic acid.
Correct Answer: A — Methanoic acid
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Q. Which carboxylic acid is commonly known as vinegar?
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A.
Formic acid
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B.
Acetic acid
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C.
Citric acid
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D.
Lactic acid
Solution
Acetic acid is commonly known as vinegar.
Correct Answer: B — Acetic acid
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Q. Which carboxylic acid is found in vinegar?
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A.
Citric acid
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B.
Acetic acid
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C.
Lactic acid
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D.
Formic acid
Solution
Acetic acid is the main component found in vinegar.
Correct Answer: B — Acetic acid
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Q. Which compound is a carboxylic acid? (2023)
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A.
CH3COOH
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B.
C2H5OH
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C.
C3H6
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D.
C4H10
Solution
CH3COOH (acetic acid) is a carboxylic acid, containing the -COOH functional group.
Correct Answer: A — CH3COOH
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Q. Which compound is a ketone? (2023)
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A.
Ethanol
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B.
Acetone
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C.
Formaldehyde
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D.
Acetic acid
Solution
Acetone is a ketone, which contains a carbonyl group (C=O) bonded to two carbon atoms.
Correct Answer: B — Acetone
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Q. Which compound is a saturated hydrocarbon? (2023)
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A.
Ethylene
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B.
Propylene
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C.
Hexane
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D.
Benzene
Solution
Hexane is a saturated hydrocarbon, containing only single bonds between carbon atoms.
Correct Answer: C — Hexane
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Q. Which compound is a saturated hydrocarbon? (2023) 2023
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A.
Ethylene
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B.
Propane
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C.
Benzene
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D.
Butyne
Solution
Propane is a saturated hydrocarbon, containing only single bonds between carbon atoms.
Correct Answer: B — Propane
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Q. Which element has the atomic number 11? (2022)
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A.
Sodium
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B.
Magnesium
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C.
Potassium
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D.
Calcium
Solution
Sodium has the atomic number 11, indicating it has 11 protons.
Correct Answer: A — Sodium
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Q. Which element has the atomic number 1?
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A.
Helium
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B.
Hydrogen
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C.
Lithium
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D.
Beryllium
Solution
Hydrogen has the atomic number 1.
Correct Answer: B — Hydrogen
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Q. Which element has the atomic number 6? (2021)
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A.
Oxygen
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B.
Carbon
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C.
Nitrogen
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D.
Hydrogen
Solution
The element with atomic number 6 is Carbon (C).
Correct Answer: B — Carbon
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Q. Which element has the highest atomic number in the first 20 elements? (2020)
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A.
Calcium
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B.
Potassium
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C.
Argon
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D.
Chlorine
Solution
Calcium has the highest atomic number (20) among the first 20 elements.
Correct Answer: A — Calcium
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Q. Which element has the highest electronegativity? (2023) 2023
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A.
Fluorine
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B.
Oxygen
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C.
Chlorine
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D.
Nitrogen
Solution
Fluorine has the highest electronegativity.
Correct Answer: A — Fluorine
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