Q. Which of the following biotechnological applications is used in the treatment of genetic disorders? (2021)
A.
Gene therapy
B.
Bioremediation
C.
Fermentation
D.
Tissue culture
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Solution
Gene therapy involves the introduction of normal genes into cells to correct genetic disorders.
Correct Answer:
A
— Gene therapy
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Q. Which of the following carboxylic acids has a pungent odor? (2022)
A.
Acetic acid
B.
Butanoic acid
C.
Formic acid
D.
Propanoic acid
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Solution
Butanoic acid has a pungent odor, often described as rancid butter.
Correct Answer:
B
— Butanoic acid
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Q. Which of the following carboxylic acids has the highest boiling point? (2020)
A.
Formic acid
B.
Acetic acid
C.
Propanoic acid
D.
Butanoic acid
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Solution
Butanoic acid has the highest boiling point due to its longer carbon chain and greater molecular weight.
Correct Answer:
D
— Butanoic acid
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Q. Which of the following changes will increase the yield of products in an endothermic reaction at equilibrium? (2023)
A.
Increase temperature
B.
Decrease pressure
C.
Increase concentration of products
D.
Add a catalyst
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Solution
Increasing the temperature for an endothermic reaction shifts the equilibrium to the right, favoring the formation of products.
Correct Answer:
A
— Increase temperature
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Q. Which of the following changes will NOT affect the position of equilibrium in a chemical reaction?
A.
Changing the concentration of reactants
B.
Changing the temperature
C.
Adding a catalyst
D.
Changing the pressure
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Solution
Adding 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
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Q. Which of the following changes will not affect the position of equilibrium in the reaction N2(g) + 3H2(g) ⇌ 2NH3(g)? (2021)
A.
Increasing the temperature
B.
Increasing the pressure
C.
Adding a catalyst
D.
Removing NH3
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Solution
A catalyst speeds up the rate of both the forward and reverse reactions equally, thus it does not affect the position of equilibrium. Other changes like temperature, pressure, and concentration of reactants/products do affect the equilibrium.
Correct Answer:
C
— Adding a catalyst
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Q. Which of the following changes will shift the equilibrium to the right for the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g)? (2022)
A.
Increase in SO2
B.
Increase in temperature
C.
Decrease in pressure
D.
Increase in O2
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Solution
According to Le Chatelier's principle, increasing the concentration of a reactant (O2 in this case) will shift the equilibrium to the right, favoring the formation of products.
Correct Answer:
D
— Increase in O2
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Q. Which of the following changes will shift the equilibrium to the right in the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)? (2021)
A.
Increasing the concentration of N2
B.
Decreasing the temperature
C.
Increasing the pressure
D.
Adding a catalyst
Show solution
Solution
Increasing the pressure will shift the equilibrium to the side with fewer moles of gas, which is the right side (2 moles of NH3) in this case.
Correct Answer:
C
— Increasing the pressure
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Q. Which of the following classes of animals is known for having scales? (2023)
A.
Amphibia
B.
Reptilia
C.
Mammalia
D.
Aves
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Solution
Reptiles are known for having scales that protect their bodies and reduce water loss.
Correct Answer:
B
— Reptilia
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Q. Which of the following classifications is the most inclusive? (2019)
A.
Species
B.
Genus
C.
Family
D.
Kingdom
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Solution
Kingdom is the most inclusive classification among the options provided, encompassing a large group of related organisms.
Correct Answer:
D
— Kingdom
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Q. Which of the following complexes exhibits geometrical isomerism? (2022) 2022
A.
[CoCl2(NH3)4]+
B.
[Ni(CO)4]
C.
[CuCl2(NH3)2]
D.
[Zn(NH3)4]2+
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Solution
[CoCl2(NH3)4]+ can exhibit geometrical isomerism due to the different arrangements of ligands around the cobalt ion.
Correct Answer:
A
— [CoCl2(NH3)4]+
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Q. Which of the following complexes is paramagnetic? (2023) 2023
A.
[Ni(CN)4]2-
B.
[Fe(H2O)6]3+
C.
[Cu(NH3)4]2+
D.
[Zn(NH3)4]2+
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Solution
[Fe(H2O)6]3+ has unpaired electrons, making it paramagnetic, while the others have all paired electrons.
Correct Answer:
B
— [Fe(H2O)6]3+
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Q. Which of the following compounds can be classified as a secondary amine? (2022)
A.
Methylamine
B.
Dimethylamine
C.
Ethylamine
D.
Aniline
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Solution
Dimethylamine is a secondary amine as it has two alkyl groups attached to the nitrogen atom.
Correct Answer:
B
— Dimethylamine
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Q. Which of the following compounds can be oxidized to form a ketone? (2022)
A.
2-Propanol
B.
Ethanol
C.
Methanol
D.
Butanoic acid
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Solution
2-Propanol can be oxidized to form acetone, which is a ketone.
Correct Answer:
A
— 2-Propanol
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Q. Which of the following compounds can be prepared by the reduction of nitrobenzene? (2022)
A.
Aniline
B.
Benzylamine
C.
Ethylamine
D.
Methylamine
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Solution
Nitrobenzene can be reduced to aniline using reducing agents like Sn/HCl.
Correct Answer:
A
— Aniline
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Q. Which of the following compounds can be used to distinguish between primary, secondary, and tertiary amines? (2023)
A.
Bromine water
B.
Nitrous acid
C.
Sodium hydroxide
D.
Hydrochloric acid
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Solution
Nitrous acid can be used to distinguish between primary, secondary, and tertiary amines, as it reacts differently with each type.
Correct Answer:
B
— Nitrous acid
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Q. Which of the following compounds contains a carboxylic acid functional group? (2021)
A.
C2H5OH
B.
C3H6O
C.
C2H4COOH
D.
C4H10
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Solution
C2H4COOH (acetic acid) contains the carboxylic acid functional group (-COOH).
Correct Answer:
C
— C2H4COOH
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Q. Which of the following compounds contains a coordinate bond? (2023)
A.
NH3
B.
H2O
C.
CO
D.
NaCl
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Solution
Carbon monoxide (CO) contains a coordinate bond between carbon and oxygen.
Correct Answer:
C
— CO
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Q. Which of the following compounds contains a double bond? (2023)
A.
H2O
B.
CO2
C.
NH3
D.
CH4
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Solution
Carbon dioxide (CO2) contains double bonds between carbon and oxygen.
Correct Answer:
B
— CO2
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Q. Which of the following compounds contains a p-block element in its highest oxidation state? (2023)
A.
SO2
B.
PCl5
C.
Na2O
D.
MgCl2
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Solution
In PCl5, phosphorus is in its highest oxidation state of +5.
Correct Answer:
B
— PCl5
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Q. Which of the following compounds contains a p-block element? (2022) 2022
A.
NaCl
B.
MgO
C.
SiO2
D.
Fe2O3
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Solution
Silicon dioxide (SiO2) contains silicon, which is a p-block element.
Correct Answer:
C
— SiO2
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Q. Which of the following compounds contains hydrogen in a negative oxidation state? (2021)
A.
HCl
B.
NaH
C.
H2O
D.
NH3
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Solution
In sodium hydride (NaH), hydrogen has an oxidation state of -1.
Correct Answer:
B
— NaH
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Q. Which of the following compounds has a dipole moment? (2023)
A.
CO2
B.
CH4
C.
HCl
D.
CCl4
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Solution
HCl has a dipole moment because it is a polar molecule with a significant difference in electronegativity between hydrogen and chlorine.
Correct Answer:
C
— HCl
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Q. Which of the following compounds has a triple bond? (2022)
A.
Ethylene
B.
Acetylene
C.
Propylene
D.
Butane
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Solution
Acetylene (C2H2) contains a triple bond between the two carbon atoms.
Correct Answer:
B
— Acetylene
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Q. Which of the following compounds is a branched alkane? (2022)
A.
C5H12
B.
C4H10
C.
C3H8
D.
C2H6
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Solution
C5H12 can exist as both straight-chain (pentane) and branched (isopentane) forms.
Correct Answer:
A
— C5H12
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Q. Which of the following compounds is a common oxidation state of vanadium? (2022)
A.
V2O5
B.
VO
C.
V2O3
D.
All of the above
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Solution
All the listed compounds represent common oxidation states of vanadium: +5 in V2O5, +2 in VO, and +3 in V2O3.
Correct Answer:
D
— All of the above
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Q. Which of the following compounds is a common oxidizing agent? (2019)
A.
HCl
B.
KMnO4
C.
NaCl
D.
CaO
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Solution
Potassium permanganate (KMnO4) is a well-known oxidizing agent used in various chemical reactions.
Correct Answer:
B
— KMnO4
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Q. Which of the following compounds is a cyclic alkane? (2022)
A.
Cyclopropane
B.
Butene
C.
Hexane
D.
Pentene
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Solution
Cyclopropane is a cyclic alkane with three carbon atoms in a ring.
Correct Answer:
A
— Cyclopropane
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Q. Which of the following compounds is a hydrogen halide? (2022)
A.
H2O
B.
NH3
C.
HCl
D.
CH4
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Solution
Hydrogen chloride (HCl) is a hydrogen halide, which is a binary compound of hydrogen and a halogen.
Correct Answer:
C
— HCl
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Q. Which of the following compounds is a ketone? (2023) 2023
A.
Propanal
B.
Butanone
C.
Benzaldehyde
D.
Ethanal
Show solution
Solution
Butanone is a ketone, characterized by having the carbonyl group (C=O) between two carbon atoms.
Correct Answer:
B
— Butanone
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