Major Competitive Exams
Q. Which of the following processes is isothermal for an ideal gas?
A.
Heating at constant volume
B.
Cooling at constant pressure
C.
Expansion against a constant external pressure
D.
Expansion where temperature remains constant
Show solution
Solution
An isothermal process for an ideal gas is characterized by the condition that the temperature remains constant during the expansion or compression.
Correct Answer: D — Expansion where temperature remains constant
Learn More →
Q. Which of the following processes is isothermal?
A.
Heating a gas in a closed container
B.
Compressing a gas without heat exchange
C.
Allowing a gas to expand slowly while maintaining constant temperature
D.
Cooling a gas in a closed container
Show solution
Solution
Allowing a gas to expand slowly while maintaining constant temperature is an isothermal process.
Correct Answer: C — Allowing a gas to expand slowly while maintaining constant temperature
Learn More →
Q. Which of the following processes is not a thermodynamic process?
A.
Isothermal
B.
Adiabatic
C.
Isochoric
D.
Static
Show solution
Solution
A static process does not involve any change in state variables, hence it is not considered a thermodynamic process.
Correct Answer: D — Static
Learn More →
Q. Which of the following processes is not governed by the First Law of Thermodynamics?
A.
Isothermal expansion
B.
Adiabatic compression
C.
Isochoric heating
D.
None of the above
Show solution
Solution
All the listed processes are governed by the First Law of Thermodynamics, so the answer is 'None of the above'.
Correct Answer: D — None of the above
Learn More →
Q. Which of the following processes is NOT influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
Fruit ripening
Show solution
Solution
Fruit ripening is primarily influenced by ethylene, not auxins.
Correct Answer: D — Fruit ripening
Learn More →
Q. Which of the following processes is NOT influenced by plant hormones? (2021)
A.
Seed germination
B.
Fruit ripening
C.
Photosynthesis
D.
Flowering
Show solution
Solution
Photosynthesis is a biochemical process that is not directly influenced by plant hormones.
Correct Answer: C — Photosynthesis
Learn More →
Q. Which of the following processes is primarily regulated by auxins? (2021)
A.
Phototropism
B.
Photosynthesis
C.
Respiration
D.
Transpiration
Show solution
Solution
Auxins are primarily responsible for phototropism, the growth of plants towards light.
Correct Answer: A — Phototropism
Learn More →
Q. Which of the following processes is spontaneous at constant temperature and pressure?
A.
Decreasing entropy
B.
Increasing entropy
C.
Constant entropy
D.
None of the above
Show solution
Solution
A spontaneous process at constant temperature and pressure is characterized by an increase in entropy.
Correct Answer: B — Increasing entropy
Learn More →
Q. Which of the following processes is used to produce synthetic rubber?
A.
Polymerization
B.
Condensation
C.
Hydrogenation
D.
Saponification
Show solution
Solution
Synthetic rubber is produced through polymerization of monomers such as butadiene and styrene.
Correct Answer: A — Polymerization
Learn More →
Q. Which of the following processes occurs during aerobic respiration in plants? (2020)
A.
Fermentation
B.
Glycolysis
C.
Anaerobic respiration
D.
Photosynthesis
Show solution
Solution
Glycolysis is the first step in aerobic respiration, where glucose is broken down to produce energy.
Correct Answer: B — Glycolysis
Learn More →
Q. Which of the following processes occurs during expiration? (2023)
A.
Diaphragm contracts
B.
Intercostal muscles relax
C.
Lungs expand
D.
Air is drawn in
Show solution
Solution
During expiration, the diaphragm relaxes and the intercostal muscles also relax, leading to a decrease in thoracic volume and expulsion of air from the lungs.
Correct Answer: B — Intercostal muscles relax
Learn More →
Q. Which of the following processes occurs during the light-dependent reactions of photosynthesis? (2020)
A.
Calvin cycle
B.
Photolysis of water
C.
Carbon fixation
D.
Synthesis of glucose
Show solution
Solution
Photolysis of water occurs during the light-dependent reactions, producing oxygen and electrons.
Correct Answer: B — Photolysis of water
Learn More →
Q. Which of the following processes occurs in the nucleus of a cell? (2023)
A.
Photosynthesis
B.
Cell respiration
C.
DNA replication
D.
Protein synthesis
Show solution
Solution
DNA replication occurs in the nucleus, where the cell's genetic material is housed.
Correct Answer: C — DNA replication
Learn More →
Q. Which of the following processes occurs in the thylakoid membranes of chloroplasts? (2020)
A.
Calvin cycle
B.
Light-dependent reactions
C.
Light-independent reactions
D.
Photorespiration
Show solution
Solution
The light-dependent reactions of photosynthesis occur in the thylakoid membranes.
Correct Answer: B — Light-dependent reactions
Learn More →
Q. Which of the following processes occurs in the thylakoid membranes? (2020)
A.
Calvin cycle
B.
Light-dependent reactions
C.
Light-independent reactions
D.
Photorespiration
Show solution
Solution
The light-dependent reactions of photosynthesis occur in the thylakoid membranes.
Correct Answer: B — Light-dependent reactions
Learn More →
Q. Which of the following processes results in an increase in entropy?
A.
Isothermal compression
B.
Adiabatic expansion
C.
Isobaric heating
D.
All of the above
Show solution
Solution
Isobaric heating increases the temperature and volume of the gas, leading to an increase in entropy.
Correct Answer: C — Isobaric heating
Learn More →
Q. Which of the following programming languages was developed first? (1957)
A.
Fortran
B.
COBOL
C.
LISP
D.
C
Show solution
Solution
Fortran, developed in the 1950s, was one of the earliest high-level programming languages, predating COBOL, LISP, and C.
Correct Answer: A — Fortran
Learn More →
Q. Which of the following properties is characteristic of covalent network solids? (2019)
A.
High electrical conductivity
B.
Brittleness
C.
Low melting points
D.
Solubility in water
Show solution
Solution
Covalent network solids are typically brittle due to the strong covalent bonds that do not allow for easy deformation.
Correct Answer: B — Brittleness
Learn More →
Q. Which of the following properties is characteristic of liquids?
A.
Definite shape
B.
Definite volume
C.
Compressibility
D.
High viscosity
Show solution
Solution
Liquids have a definite volume but take the shape of their container.
Correct Answer: B — Definite volume
Learn More →
Q. Which of the following properties is NOT associated with liquids?
A.
Surface tension
B.
Viscosity
C.
Compressibility
D.
Fluidity
Show solution
Solution
Liquids are generally incompressible, so compressibility is not a property associated with them.
Correct Answer: C — Compressibility
Learn More →
Q. Which of the following properties is NOT typical of elastomers?
A.
High elasticity
B.
Low tensile strength
C.
Good resilience
D.
Brittleness
Show solution
Solution
Brittleness is not a typical property of elastomers; they are known for their high elasticity and resilience.
Correct Answer: D — Brittleness
Learn More →
Q. Which of the following properties is NOT typical of liquids?
A.
High density
B.
Low compressibility
C.
Fixed volume
D.
Fixed shape
Show solution
Solution
Liquids have a fixed volume but do not have a fixed shape; they take the shape of their container.
Correct Answer: D — Fixed shape
Learn More →
Q. Which of the following properties is typical of metallic solids? (2019)
A.
Brittleness
B.
Electrical conductivity
C.
Low melting point
D.
Insulating nature
Show solution
Solution
Metallic solids are known for their high electrical conductivity due to the presence of free-moving electrons.
Correct Answer: B — Electrical conductivity
Learn More →
Q. Which of the following properties of liquids is affected by temperature?
A.
Density
B.
Viscosity
C.
Surface tension
D.
All of the above
Show solution
Solution
All these properties change with temperature; for example, viscosity decreases with increasing temperature.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following quadrilaterals has all sides equal and opposite angles equal?
A.
Square
B.
Rectangle
C.
Trapezium
D.
Rhombus
Show solution
Solution
A rhombus has all sides equal and opposite angles equal.
Correct Answer: D — Rhombus
Learn More →
Q. Which of the following quadrilaterals has the property that its diagonals are equal in length? (2023)
A.
Square
B.
Rhombus
C.
Trapezium
D.
Kite
Show solution
Solution
A square has equal diagonals, which is a property of squares and rectangles.
Correct Answer: A — Square
Learn More →
Q. Which of the following quantities has no dimension? (2023)
A.
Angle
B.
Force
C.
Velocity
D.
Acceleration
Show solution
Solution
Angle is a dimensionless quantity.
Correct Answer: A — Angle
Learn More →
Q. Which of the following quantities has no dimensions? (2019)
A.
Force
B.
Energy
C.
Angle
D.
Pressure
Show solution
Solution
Angle is a pure number and has no dimensions, while force, energy, and pressure all have dimensions.
Correct Answer: C — Angle
Learn More →
Q. Which of the following quantities has the dimension of energy?
A.
Force
B.
Work
C.
Power
D.
Pressure
Show solution
Solution
Work is defined as force times distance, and its dimensions are ML^2T^-2, which are the same as energy.
Correct Answer: B — Work
Learn More →
Q. Which of the following quantities has the dimension of [M^0 L^0 T^-1]?
A.
Velocity
B.
Acceleration
C.
Frequency
D.
Force
Show solution
Solution
Frequency has the dimension of [M^0 L^0 T^-1] as it is defined as the number of cycles per unit time.
Correct Answer: C — Frequency
Learn More →
Showing 17581 to 17610 of 18756 (626 Pages)