Chemistry Syllabus (JEE Main)
Q. What is the work done by an ideal gas during an isothermal expansion from volume Vi to Vf?
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A.
nRT ln(Vf/Vi)
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B.
nR(Tf - Ti)
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C.
Zero
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D.
nRT
Solution
The work done by an ideal gas during an isothermal expansion is W = nRT ln(Vf/Vi).
Correct Answer: A — nRT ln(Vf/Vi)
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Q. What phenomenon occurs when a liquid rises in a narrow tube against gravity?
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A.
Viscosity
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B.
Surface tension
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C.
Capillarity
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D.
Hydrostatic pressure
Solution
Capillarity is the phenomenon where liquid rises in a narrow tube due to surface tension.
Correct Answer: C — Capillarity
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Q. What role do enzymes play in biological systems?
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A.
They provide structural support
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B.
They act as catalysts for biochemical reactions
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C.
They store genetic information
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D.
They transport molecules across membranes
Solution
Enzymes are proteins that act as catalysts, speeding up biochemical reactions without being consumed in the process.
Correct Answer: B — They act as catalysts for biochemical reactions
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Q. What type of adsorption occurs when the adsorbate forms strong chemical bonds with the adsorbent?
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A.
Physisorption
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B.
Chemisorption
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C.
Desorption
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D.
Sorption
Solution
Chemisorption involves the formation of strong chemical bonds between the adsorbate and the adsorbent.
Correct Answer: B — Chemisorption
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Q. What type of alcohol is isopropanol?
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A.
Primary
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B.
Secondary
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C.
Tertiary
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D.
None of the above
Solution
Isopropanol (2-propanol) is a secondary alcohol, as the hydroxyl group is attached to a carbon that is connected to two other carbons.
Correct Answer: B — Secondary
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Q. What type of biomolecule are enzymes classified as?
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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
Enzymes are primarily proteins that catalyze biochemical reactions.
Correct Answer: B — Proteins
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Q. What type of biomolecule is insulin?
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A.
Carbohydrate
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B.
Lipid
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C.
Protein
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D.
Nucleic acid
Solution
Insulin is a protein hormone that regulates glucose levels in the blood.
Correct Answer: C — Protein
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Q. What type of bond forms between the carboxyl group of one amino acid and the amino group of another?
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A.
Hydrogen bond
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B.
Ionic bond
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C.
Peptide bond
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D.
Disulfide bond
Solution
A peptide bond forms between the carboxyl group of one amino acid and the amino group of another, linking them together in a protein.
Correct Answer: C — Peptide bond
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Q. What type of bond is formed between amino acids in a protein?
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A.
Ionic bond
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B.
Covalent bond
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C.
Hydrogen bond
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D.
Van der Waals forces
Solution
A covalent bond, specifically a peptide bond, is formed between amino acids in a protein.
Correct Answer: B — Covalent bond
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Q. What type of bond is formed between sodium and chlorine in NaCl?
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A.
Ionic bond
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B.
Covalent bond
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C.
Metallic bond
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D.
Van der Waals bond
Solution
NaCl is formed by an ionic bond due to the transfer of electrons from sodium to chlorine.
Correct Answer: A — Ionic bond
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Q. What type of bond is formed between the amino group of one amino acid and the carboxyl group of another?
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A.
Ionic bond
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B.
Hydrogen bond
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C.
Peptide bond
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D.
Covalent bond
Solution
A peptide bond is formed between the amino group of one amino acid and the carboxyl group of another.
Correct Answer: C — Peptide bond
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Q. What type of bond is formed between two metal atoms?
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A.
Ionic bond
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B.
Covalent bond
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C.
Metallic bond
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D.
Polar bond
Solution
Metallic bonds are formed between metal atoms, characterized by a 'sea of electrons' that are free to move.
Correct Answer: C — Metallic bond
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Q. What type of bond is primarily responsible for the secondary structure of proteins?
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A.
Ionic bonds
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B.
Hydrogen bonds
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C.
Covalent bonds
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D.
Disulfide bonds
Solution
Hydrogen bonds are primarily responsible for the formation of secondary structures like alpha-helices and beta-pleated sheets in proteins.
Correct Answer: B — Hydrogen bonds
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Q. What type of bond links amino acids in proteins?
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A.
Ionic bond
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B.
Covalent bond
-
C.
Hydrogen bond
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D.
Van der Waals forces
Solution
Amino acids are linked by peptide bonds, which are a type of covalent bond.
Correct Answer: B — Covalent bond
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Q. What type of bond links amino acids together in a protein?
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A.
Ionic bond
-
B.
Covalent bond
-
C.
Hydrogen bond
-
D.
Peptide bond
Solution
A peptide bond is a specific type of covalent bond that links amino acids together in proteins.
Correct Answer: D — Peptide bond
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Q. What type of bond links amino acids together in proteins?
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A.
Ionic bond
-
B.
Covalent bond
-
C.
Hydrogen bond
-
D.
Van der Waals forces
Solution
Amino acids are linked by peptide bonds, which are a type of covalent bond.
Correct Answer: B — Covalent bond
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Q. What type of bond links monosaccharides in a disaccharide?
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A.
Ionic bond
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B.
Covalent bond
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C.
Hydrogen bond
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D.
Van der Waals bond
Solution
Monosaccharides in a disaccharide are linked by a covalent bond known as a glycosidic bond.
Correct Answer: B — Covalent bond
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Q. What type of bond links monosaccharides in polysaccharides?
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A.
Ionic bond
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B.
Covalent bond
-
C.
Hydrogen bond
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D.
Van der Waals forces
Solution
Monosaccharides are linked by glycosidic bonds, which are a type of covalent bond.
Correct Answer: B — Covalent bond
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Q. What type of bonding is present in alkanes?
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A.
Ionic bonding
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B.
Covalent bonding
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C.
Metallic bonding
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D.
Hydrogen bonding
Solution
Alkanes are characterized by covalent bonding between carbon and hydrogen atoms.
Correct Answer: B — Covalent bonding
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Q. What type of carbohydrate is glucose?
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A.
Disaccharide
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B.
Monosaccharide
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C.
Polysaccharide
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D.
Oligosaccharide
Solution
Glucose is a monosaccharide, which is the simplest form of carbohydrates.
Correct Answer: B — Monosaccharide
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Q. What type of carbohydrate is starch?
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A.
Monosaccharide
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B.
Disaccharide
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C.
Oligosaccharide
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D.
Polysaccharide
Solution
Starch is classified as a polysaccharide, consisting of many glucose units.
Correct Answer: D — Polysaccharide
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Q. What type of carbohydrate is sucrose?
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A.
Monosaccharide
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B.
Disaccharide
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C.
Oligosaccharide
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D.
Polysaccharide
Solution
Sucrose is a disaccharide composed of glucose and fructose.
Correct Answer: B — Disaccharide
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Q. What type of hybridization is present in alkynes?
Solution
Alkynes have sp hybridization due to the presence of a triple bond.
Correct Answer: A — sp
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Q. What type of hybridization is present in ethylene (C2H4)?
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A.
sp
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B.
sp2
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C.
sp3
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D.
dsp3
Solution
Ethylene has sp2 hybridization due to the presence of a double bond between the carbon atoms.
Correct Answer: B — sp2
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Q. What type of hybridization is present in the carbon atom of ethylene (C2H4)?
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A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
The carbon atoms in ethylene undergo sp2 hybridization.
Correct Answer: B — sp2
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Q. What type of hybridization is present in the carbon atoms of alkanes?
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A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
The carbon atoms in alkanes are sp3 hybridized.
Correct Answer: C — sp3
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Q. What type of hybridization is present in the carbon atoms of alkenes?
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A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
The carbon atoms in alkenes are sp2 hybridized due to the presence of a double bond.
Correct Answer: B — sp2
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Q. What type of hybridization is present in the molecule BF3?
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A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
BF3 has sp2 hybridization as it has three bonding pairs and no lone pairs.
Correct Answer: B — sp2
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Q. What type of hybridization occurs in ethylene (C2H4)?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
Ethylene has sp2 hybridization as each carbon atom forms three sigma bonds and one pi bond.
Correct Answer: B — sp2
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Q. What type of hybridization occurs in methane (CH4)?
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A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
Methane has sp3 hybridization as it has four equivalent bonds formed by the mixing of one s and three p orbitals.
Correct Answer: C — sp3
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