Q. Which of the following statements is true regarding the boiling points of aldehydes and ketones? (2023)
-
A.
Aldehydes have higher boiling points than ketones
-
B.
Ketones have higher boiling points than aldehydes
-
C.
Both have the same boiling points
-
D.
None of the above
Solution
Ketones generally have higher boiling points than aldehydes due to stronger dipole-dipole interactions.
Correct Answer: B — Ketones have higher boiling points than aldehydes
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Q. Which of the following statements is true regarding the complex [Ag(NH3)2]+? (2023)
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A.
It is a tetrahedral complex.
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B.
It is a square planar complex.
-
C.
It is a linear complex.
-
D.
It is an octahedral complex.
Solution
[Ag(NH3)2]+ is a linear complex because silver (Ag) has a coordination number of 2 with two bidentate ligands.
Correct Answer: C — It is a linear complex.
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Q. Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2023)
-
A.
It is tetrahedral
-
B.
It is octahedral
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C.
It is square planar
-
D.
It has a coordination number of 4
Solution
The complex [Cr(NH3)6]3+ is octahedral with a coordination number of 6, as it is surrounded by six ammonia ligands.
Correct Answer: B — It is octahedral
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Q. Which of the following statements is true regarding the equilibrium constant? (2020)
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A.
Kc is temperature dependent
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B.
Kc is pressure dependent
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C.
Kc is concentration dependent
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D.
Kc is independent of temperature
Solution
The equilibrium constant Kc is dependent on temperature; changing the temperature will change the value of Kc.
Correct Answer: A — Kc is temperature dependent
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Q. Which of the following statements is true regarding the magnetic field due to a solenoid? (2023)
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A.
It is uniform inside and zero outside
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B.
It is zero inside and uniform outside
-
C.
It is uniform both inside and outside
-
D.
It varies linearly with distance
Solution
A solenoid produces a uniform magnetic field inside and negligible field outside when it is long compared to its diameter.
Correct Answer: A — It is uniform inside and zero outside
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Q. Which of the following statements is true regarding the magnetic field inside a long solenoid? (2023)
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A.
It is zero
-
B.
It is uniform and parallel to the axis
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C.
It varies with distance from the center
-
D.
It is stronger at the ends
Solution
Inside a long solenoid, the magnetic field is uniform and parallel to the axis of the solenoid, provided the solenoid is long enough.
Correct Answer: B — It is uniform and parallel to the axis
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Q. Which of the following states of matter has the weakest intermolecular forces? (2023)
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A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
Plasma
Solution
Gases have the weakest intermolecular forces, allowing particles to move freely.
Correct Answer: C — Gas
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Q. Which of the following structures develops into a fruit after fertilization? (2022)
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A.
Ovary
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B.
Stigma
-
C.
Anther
-
D.
Filament
Solution
After fertilization, the ovary of the flower develops into a fruit, which contains the seeds.
Correct Answer: A — Ovary
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Q. Which of the following structures develops into a seed after fertilization? (2022)
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A.
Ovary
-
B.
Ovule
-
C.
Stigma
-
D.
Anther
Solution
The ovule develops into a seed after fertilization occurs.
Correct Answer: B — Ovule
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Q. Which of the following structures has the highest packing efficiency? (2019)
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A.
Simple cubic
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B.
Body-centered cubic
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C.
Face-centered cubic
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D.
Hexagonal close-packed
Solution
The face-centered cubic (FCC) structure has the highest packing efficiency of approximately 74%.
Correct Answer: C — Face-centered cubic
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Q. Which of the following structures is found in plant cells but not in animal cells? (2020)
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A.
Cell membrane
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B.
Nucleus
-
C.
Chloroplast
-
D.
Mitochondria
Solution
Chloroplasts are found in plant cells and are responsible for photosynthesis, while animal cells do not have them.
Correct Answer: C — Chloroplast
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Q. Which of the following structures is found only in plant cells? (2022)
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A.
Cell membrane
-
B.
Mitochondria
-
C.
Chloroplast
-
D.
Ribosome
Solution
Chloroplasts are found only in plant cells and are responsible for photosynthesis.
Correct Answer: C — Chloroplast
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Q. Which of the following structures is involved in pollen production? (2021)
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A.
Ovary
-
B.
Anther
-
C.
Style
-
D.
Stigma
Solution
The anther is the part of the stamen that produces pollen.
Correct Answer: B — Anther
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Q. Which of the following structures is NOT part of the respiratory system? (2021)
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A.
Trachea
-
B.
Larynx
-
C.
Esophagus
-
D.
Bronchi
Solution
The esophagus is part of the digestive system, while the trachea, larynx, and bronchi are components of the respiratory system.
Correct Answer: C — Esophagus
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Q. Which of the following structures is responsible for the production of red blood cells? (2019)
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A.
Liver
-
B.
Spleen
-
C.
Bone marrow
-
D.
Thymus
Solution
Bone marrow is the primary site for the production of red blood cells in the human body.
Correct Answer: C — Bone marrow
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Q. Which of the following structures is responsible for the storage of calcium ions in muscle cells? (2023)
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A.
Mitochondria
-
B.
Sarcoplasmic reticulum
-
C.
Nucleus
-
D.
Golgi apparatus
Solution
The sarcoplasmic reticulum is responsible for storing calcium ions, which are crucial for muscle contraction.
Correct Answer: B — Sarcoplasmic reticulum
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Q. Which of the following structures is responsible for transmitting nerve impulses to muscle fibers? (2023)
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A.
Motor neuron
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B.
Sensory neuron
-
C.
Interneuron
-
D.
Glial cell
Solution
Motor neurons transmit nerve impulses to muscle fibers, initiating muscle contraction.
Correct Answer: A — Motor neuron
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Q. Which of the following structures is responsible for transmitting the action potential in muscle fibers? (2023)
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A.
A. Sarcoplasmic reticulum
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B.
B. T-tubules
-
C.
C. Myofibrils
-
D.
D. Endomysium
Solution
T-tubules (transverse tubules) are responsible for transmitting the action potential deep into the muscle fiber.
Correct Answer: B — B. T-tubules
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Q. Which of the following structures prevents backflow of blood in the heart? (2023)
-
A.
Valves
-
B.
Aorta
-
C.
Vena cavae
-
D.
Septum
Solution
Valves in the heart prevent the backflow of blood, ensuring it flows in one direction through the heart chambers.
Correct Answer: A — Valves
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Q. Which of the following substances is NOT typically found in urine? (2022)
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A.
Urea
-
B.
Glucose
-
C.
Creatinine
-
D.
Uric acid
Solution
Glucose is not typically found in urine unless there is a condition such as diabetes mellitus.
Correct Answer: B — Glucose
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Q. Which of the following techniques is used for the production of genetically modified plants? (2023)
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A.
Polymerase chain reaction
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B.
Gene cloning
-
C.
Agrobacterium-mediated transformation
-
D.
Electrophoresis
Solution
Agrobacterium-mediated transformation is a common technique used to introduce foreign genes into plant cells.
Correct Answer: C — Agrobacterium-mediated transformation
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Q. Which of the following techniques is used for the production of monoclonal antibodies? (2020)
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A.
Hybridoma technology
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B.
Gene editing
-
C.
CRISPR-Cas9
-
D.
Fermentation
Solution
Hybridoma technology is used to produce monoclonal antibodies by fusing myeloma cells with specific B cells.
Correct Answer: A — Hybridoma technology
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Q. Which of the following techniques is used for the separation of DNA fragments? (2019)
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A.
PCR
-
B.
Gel electrophoresis
-
C.
Cloning
-
D.
Transformation
Solution
Gel electrophoresis is a technique used to separate DNA fragments based on their size, allowing for analysis and purification.
Correct Answer: B — Gel electrophoresis
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Q. Which of the following techniques is used to separate DNA fragments based on size? (2022)
-
A.
PCR
-
B.
Gel electrophoresis
-
C.
DNA sequencing
-
D.
Cloning
Solution
Gel electrophoresis is a technique used to separate DNA fragments based on their size, allowing for analysis and purification of DNA.
Correct Answer: B — Gel electrophoresis
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Q. Which of the following terms describes the maximum population size that an environment can sustain? (2018)
-
A.
Carrying capacity
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B.
Biotic potential
-
C.
Population density
-
D.
Ecological footprint
Solution
Carrying capacity is the maximum number of individuals of a species that an environment can support sustainably.
Correct Answer: A — Carrying capacity
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Q. Which of the following terms describes the physical appearance of an organism? (2023)
-
A.
Genotype
-
B.
Phenotype
-
C.
Allele
-
D.
Locus
Solution
The term 'phenotype' refers to the physical appearance of an organism.
Correct Answer: B — Phenotype
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Q. Which of the following tissues is responsible for the growth in length of a plant? (2022)
-
A.
Lateral meristem
-
B.
Apical meristem
-
C.
Parenchyma
-
D.
Sclerenchyma
Solution
Apical meristem is responsible for the growth in length of a plant, found at the tips of roots and shoots.
Correct Answer: B — Apical meristem
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Q. Which of the following tissues is responsible for the transmission of electrical impulses? (2022)
-
A.
Epithelial tissue
-
B.
Connective tissue
-
C.
Muscle tissue
-
D.
Nervous tissue
Solution
Nervous tissue is responsible for the transmission of electrical impulses throughout the body.
Correct Answer: D — Nervous tissue
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Q. Which of the following transitions in a hydrogen atom will emit the highest energy photon? (2019)
-
A.
n=2 to n=1
-
B.
n=3 to n=2
-
C.
n=4 to n=3
-
D.
n=5 to n=4
Solution
The energy of the emitted photon is highest for the transition from n=2 to n=1, as it involves the largest difference in energy levels.
Correct Answer: A — n=2 to n=1
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Q. Which of the following types of solids has the highest melting point? (2019)
-
A.
Ionic solids
-
B.
Covalent network solids
-
C.
Molecular solids
-
D.
Metallic solids
Solution
Covalent network solids, such as diamond, have the highest melting points due to the strong covalent bonds throughout the structure.
Correct Answer: B — Covalent network solids
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