Q. Which of the following is a characteristic of gases?
A.
Definite shape
B.
Definite volume
C.
Compressibility
D.
Incompressibility
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Solution
Gases are highly compressible, meaning their volume can change significantly under pressure.
Correct Answer:
C
— Compressibility
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Q. Which of the following is a characteristic of genetically modified organisms (GMOs)? (2023)
A.
They are always harmful to the environment
B.
They contain genes from other species
C.
They cannot reproduce
D.
They are not regulated by any laws
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Solution
GMOs are organisms whose genetic material has been altered using genetic engineering techniques, often incorporating genes from other species.
Correct Answer:
B
— They contain genes from other species
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Q. Which of the following is a characteristic of geometric isomers?
A.
Different connectivity of atoms
B.
Different spatial arrangement
C.
Different molecular formulas
D.
Different functional groups
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Solution
Geometric isomers have the same connectivity of atoms but differ in their spatial arrangement.
Correct Answer:
B
— Different spatial arrangement
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Q. Which of the following is a characteristic of gibberellins? (2019)
A.
Inhibition of seed germination
B.
Promotion of flowering
C.
Stimulation of leaf senescence
D.
Inhibition of stem elongation
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Solution
Gibberellins promote flowering and are also involved in seed germination and stem elongation.
Correct Answer:
B
— Promotion of flowering
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Q. Which of the following is a characteristic of harmonic progression?
A.
The terms are always increasing.
B.
The terms can be expressed as fractions.
C.
The terms are always integers.
D.
The common ratio is constant.
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Solution
Harmonic progression can include fractions, as it is defined through the reciprocals of an arithmetic progression.
Correct Answer:
B
— The terms can be expressed as fractions.
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Q. Which of the following is a characteristic of harmonic progressions?
A.
They can only contain positive numbers.
B.
They can be represented graphically as a straight line.
C.
The difference between consecutive terms is constant.
D.
The sum of the first n terms can be calculated easily.
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Solution
Harmonic progressions can contain negative numbers, but the terms themselves must be positive to maintain the definition of harmonic sequences.
Correct Answer:
A
— They can only contain positive numbers.
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Q. Which of the following is a characteristic of hydrogen bonding?
A.
Occurs between two hydrogen atoms
B.
Involves a hydrogen atom bonded to a highly electronegative atom
C.
Is stronger than covalent bonds
D.
Is a type of ionic bond
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Solution
Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom like oxygen or nitrogen.
Correct Answer:
B
— Involves a hydrogen atom bonded to a highly electronegative atom
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Q. Which of the following is a characteristic of hydrogen bonds?
A.
They are stronger than covalent bonds
B.
They occur between hydrogen and electronegative atoms
C.
They are permanent
D.
They are ionic
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Solution
Hydrogen bonds occur between hydrogen and highly electronegative atoms like oxygen, nitrogen, or fluorine.
Correct Answer:
B
— They occur between hydrogen and electronegative atoms
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Q. Which of the following is a characteristic of hydrogen gas?
A.
It is colorless
B.
It is heavier than air
C.
It is non-flammable
D.
It is a good conductor of electricity
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Solution
Hydrogen gas is colorless and highly flammable.
Correct Answer:
A
— It is colorless
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Q. Which of the following is a characteristic of intrinsic semiconductors?
A.
High conductivity
B.
Temperature-dependent conductivity
C.
Presence of impurities
D.
Permanent charge carriers
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Solution
Intrinsic semiconductors have conductivity that is highly dependent on temperature, as they have no impurities.
Correct Answer:
B
— Temperature-dependent conductivity
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Q. Which of the following is a characteristic of ionic compounds?
A.
High volatility
B.
High melting points
C.
Poor solubility in water
D.
Good electrical conductivity in solid state
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Solution
Ionic compounds typically have high melting points due to strong electrostatic forces between ions.
Correct Answer:
B
— High melting points
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Q. Which of the following is a characteristic of ionic solids? (2020)
A.
High electrical conductivity in solid state
B.
High melting point
C.
Low density
D.
Malleable
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Solution
Ionic solids are characterized by high melting points due to the strong electrostatic forces between the ions.
Correct Answer:
B
— High melting point
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Q. Which of the following is a characteristic of irrational numbers?
A.
They can be expressed as a fraction.
B.
They have a non-repeating, non-terminating decimal expansion.
C.
They are always positive.
D.
They can be represented on a number line as whole numbers.
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Solution
Irrational numbers are characterized by their non-repeating, non-terminating decimal expansion, distinguishing them from rational numbers.
Correct Answer:
B
— They have a non-repeating, non-terminating decimal expansion.
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Q. Which of the following is a characteristic of isomers? (2022)
A.
Same molecular formula
B.
Different molecular formula
C.
Same physical properties
D.
Same structural formula
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Solution
Isomers have the same molecular formula but different structural or spatial arrangements.
Correct Answer:
A
— Same molecular formula
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Q. Which of the following is a characteristic of isotopes?
A.
Same number of protons, different number of neutrons
B.
Different number of protons, same number of neutrons
C.
Same mass number
D.
Different chemical properties
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Solution
Isotopes have the same number of protons but different numbers of neutrons.
Correct Answer:
A
— Same number of protons, different number of neutrons
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Q. Which of the following is a characteristic of life? (2022)
A.
Ability to evolve
B.
Ability to freeze
C.
Ability to dissolve
D.
Ability to float
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Solution
The ability to evolve is a characteristic of life, allowing organisms to adapt to their environment over generations.
Correct Answer:
A
— Ability to evolve
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Q. Which of the following is a characteristic of linearly polarized light?
A.
It vibrates in all directions
B.
It vibrates in a single plane
C.
It has a constant frequency
D.
It travels faster than unpolarized light
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Solution
Linearly polarized light vibrates in a single plane, as opposed to unpolarized light which vibrates in multiple planes.
Correct Answer:
B
— It vibrates in a single plane
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Q. Which of the following is a characteristic of lipids?
A.
Soluble in water
B.
Insoluble in water
C.
Made of amino acids
D.
Formed by nucleotides
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Solution
Lipids are characterized by their insolubility in water due to their hydrophobic nature.
Correct Answer:
B
— Insoluble in water
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Q. Which of the following is a characteristic of living organisms? (2022)
A.
They can exist in isolation
B.
They can evolve
C.
They do not require energy
D.
They cannot adapt
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Solution
Living organisms can evolve over time, which is a fundamental characteristic of life.
Correct Answer:
B
— They can evolve
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Q. Which of the following is a characteristic of meristematic tissue? (2022)
A.
It is differentiated
B.
It has the ability to divide
C.
It is dead
D.
It is found in mature tissues
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Solution
Meristematic tissue is characterized by its ability to divide and give rise to various types of plant tissues.
Correct Answer:
B
— It has the ability to divide
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Q. Which of the following is a characteristic of multilayer adsorption? (2019)
A.
Occurs at low pressures only
B.
Described by the Langmuir isotherm
C.
Described by the BET theory
D.
Involves only physical adsorption
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Solution
Multilayer adsorption is described by the BET theory, which accounts for the formation of multiple layers of adsorbate on the adsorbent.
Correct Answer:
C
— Described by the BET theory
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Q. Which of the following is a characteristic of noble gases?
A.
High reactivity
B.
Low ionization energy
C.
Complete valence shell
D.
Forming cations easily
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Solution
Noble gases have a complete valence shell, making them largely unreactive.
Correct Answer:
C
— Complete valence shell
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Q. Which of the following is a characteristic of noble metals? (2019)
A.
Highly reactive
B.
Corrosion resistant
C.
Low melting points
D.
Brittle
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Solution
Noble metals, such as gold and platinum, are known for their resistance to corrosion and oxidation.
Correct Answer:
B
— Corrosion resistant
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Q. Which of the following is a characteristic of non-Newtonian fluids?
A.
Constant viscosity
B.
Viscosity changes with shear rate
C.
Incompressible
D.
High surface tension
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Solution
Non-Newtonian fluids exhibit a change in viscosity with the rate of shear applied.
Correct Answer:
B
— Viscosity changes with shear rate
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Q. Which of the following is a characteristic of nuclear fusion? (2023)
A.
Releases energy
B.
Requires high temperature
C.
Occurs in stars
D.
All of the above
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Solution
Nuclear fusion releases energy, requires high temperatures, and occurs in stars, making all options correct.
Correct Answer:
D
— All of the above
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Q. Which of the following is a characteristic of nuclear reactions compared to chemical reactions? (2023)
A.
Involves electrons
B.
Involves large energy changes
C.
Involves only valence electrons
D.
Involves breaking of chemical bonds
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Solution
Nuclear reactions involve large energy changes due to the conversion of mass into energy, unlike chemical reactions.
Correct Answer:
B
— Involves large energy changes
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Q. Which of the following is a characteristic of numbers divisible by 7?
A.
They end in 0 or 5
B.
The double of the last digit subtracted from the rest of the number is divisible by 7
C.
They are always even
D.
They are always prime
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Solution
A common rule for checking divisibility by 7 is to double the last digit and subtract it from the rest of the number; if the result is divisible by 7, then the original number is also divisible by 7.
Correct Answer:
B
— The double of the last digit subtracted from the rest of the number is divisible by 7
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Q. Which of the following is a characteristic of optical isomers?
A.
They have the same physical properties
B.
They rotate plane-polarized light in opposite directions
C.
They have different molecular weights
D.
They cannot be superimposed on each other
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Solution
Optical isomers, or enantiomers, rotate plane-polarized light in opposite directions.
Correct Answer:
B
— They rotate plane-polarized light in opposite directions
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Q. Which of the following is a characteristic of organic compounds? (2021)
A.
They contain carbon
B.
They are always solid
C.
They are ionic
D.
They do not burn
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Solution
Organic compounds are primarily characterized by the presence of carbon atoms in their structure.
Correct Answer:
A
— They contain carbon
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Q. Which of the following is a characteristic of overdamped systems?
A.
They oscillate slowly
B.
They return to equilibrium slowly without oscillating
C.
They oscillate rapidly
D.
They have maximum amplitude
Show solution
Solution
Overdamped systems return to equilibrium slowly without oscillating, as the damping is strong.
Correct Answer:
B
— They return to equilibrium slowly without oscillating
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