Major Competitive Exams

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Q. Which of the following statements about aromatic amines is true?
  • A. They are more basic than aliphatic amines
  • B. They are less basic than aliphatic amines
  • C. They do not react with acids
  • D. They are neutral compounds
Q. Which of the following statements about aromatic compounds is true?
  • A. They are always colorless
  • B. They have a sweet smell
  • C. They are non-toxic
  • D. They can be carcinogenic
Q. Which of the following statements about base systems is incorrect? (2023)
  • A. Base 2 is used in digital electronics.
  • B. Base 10 is the most widely used numeral system.
  • C. Base 16 can represent more values than base 10.
  • D. Base 8 is more efficient than base 2.
Q. Which of the following statements about buoyancy is true?
  • A. Buoyant force acts downward
  • B. Buoyant force is equal to the weight of the fluid displaced
  • C. Buoyant force depends on the shape of the object
  • D. Buoyant force is always equal to the weight of the object
Q. Which of the following statements about carboxylic acids is incorrect? (2020)
  • A. They can form hydrogen bonds.
  • B. They have higher boiling points than alcohols.
  • C. They are less acidic than alcohols.
  • D. They can be converted to esters.
Q. Which of the following statements about carboxylic acids is true?
  • A. They are always soluble in water
  • B. They have higher boiling points than alcohols
  • C. They can form hydrogen bonds
  • D. All of the above
Q. Which of the following statements about catalysts is true?
  • A. They are consumed in the reaction
  • B. They increase the activation energy
  • C. They provide an alternative reaction pathway
  • D. They change the equilibrium constant
Q. Which of the following statements about chemisorption is true? (2022)
  • A. It is a reversible process
  • B. It involves the formation of strong chemical bonds
  • C. It occurs at low temperatures
  • D. It is independent of the nature of the adsorbate
Q. Which of the following statements about circularly polarized light is true?
  • A. It has no preferred direction of oscillation
  • B. It oscillates in a single plane
  • C. It can be converted to linearly polarized light
  • D. It is always produced by reflection
Q. Which of the following statements about colligative properties is true?
  • A. They depend on the identity of the solute
  • B. They depend on the number of solute particles
  • C. They are independent of temperature
  • D. They are only applicable to ionic compounds
Q. Which of the following statements about constraint-based sets is correct?
  • A. All elements in a constraint-based set must be unique.
  • B. Constraints can be both inclusive and exclusive.
  • C. Constraints do not affect the size of the set.
  • D. All elements must be integers.
Q. Which of the following statements about constraint-based sets is true?
  • A. All constraints are equal in importance.
  • B. Constraints can be hierarchical.
  • C. Constraints do not affect the outcome.
  • D. Constraints are always numerical.
Q. Which of the following statements about constraints in set theory is FALSE?
  • A. Constraints can be both inclusive and exclusive.
  • B. Constraints can change the nature of the set.
  • C. All constraints must be numerical.
  • D. Constraints help in defining subsets.
Q. Which of the following statements about coordination compounds is incorrect? (2023)
  • A. They can exhibit geometric isomerism.
  • B. They can exhibit optical isomerism.
  • C. All coordination compounds are colored.
  • D. They can form complexes with transition metals.
Q. Which of the following statements about diffraction gratings is true?
  • A. They can only produce first-order maxima
  • B. They can produce multiple orders of maxima
  • C. They do not produce any maxima
  • D. They only work with monochromatic light
Q. Which of the following statements about diffraction is true?
  • A. Diffraction can occur with any type of wave
  • B. Diffraction only occurs with sound waves
  • C. Diffraction is only observed in light waves
  • D. Diffraction is a phenomenon exclusive to electromagnetic waves
Q. Which of the following statements about dynamic equilibrium is true?
  • A. The concentrations of reactants and products are equal
  • B. The rate of the forward reaction equals the rate of the reverse reaction
  • C. The reaction has stopped
  • D. The system is at rest
Q. Which of the following statements about elastic potential energy stored in a stretched wire is true?
  • A. It is proportional to the square of the extension
  • B. It is proportional to the extension
  • C. It is independent of the material
  • D. It is always constant
Q. Which of the following statements about electric field lines is true?
  • A. They can cross each other
  • B. They are always straight
  • C. They point from positive to negative charges
  • D. They are always circular
Q. Which of the following statements about electromagnetic waves is true?
  • A. They require a medium to propagate
  • B. They travel at the speed of sound
  • C. They are transverse waves
  • D. They are longitudinal waves
Q. Which of the following statements about electrons is true?
  • A. They have a positive charge
  • B. They are found in the nucleus
  • C. They have a negligible mass
  • D. They are stationary
Q. Which of the following statements about enthalpy is true?
  • A. Enthalpy is an extensive property.
  • B. Enthalpy is an intensive property.
  • C. Enthalpy cannot be measured directly.
  • D. Enthalpy is always positive.
Q. Which of the following statements about entropy is true?
  • A. Entropy is a measure of disorder.
  • B. Entropy decreases in spontaneous processes.
  • C. Entropy is always constant.
  • D. Entropy cannot be calculated.
Q. Which of the following statements about equilibrium constants is true?
  • A. K is temperature dependent
  • B. K is pressure dependent
  • C. K is concentration dependent
  • D. K is always equal to 1
Q. Which of the following statements about ethers is true?
  • A. Ethers are more polar than alcohols
  • B. Ethers have higher boiling points than alcohols
  • C. Ethers are less reactive than alcohols
  • D. Ethers can form hydrogen bonds with water
Q. Which of the following statements about evolution is true? (2000)
  • A. Evolution is a linear process.
  • B. Evolution can occur in response to environmental changes.
  • C. All traits are adaptive.
  • D. Evolution results in perfect organisms.
Q. Which of the following statements about exponents is false?
  • A. a^m * a^n = a^(m+n)
  • B. a^m / a^n = a^(m-n)
  • C. a^0 = 0
  • D. a^(-n) = 1/a^n
Q. Which of the following statements about exponents is incorrect?
  • A. a^(m+n) = a^m * a^n
  • B. a^(m-n) = a^m / a^n
  • C. a^m * b^m = (ab)^m
  • D. a^m + a^n = a^(m+n)
Q. Which of the following statements about factors is incorrect?
  • A. Every number has at least two factors.
  • B. Factors can be negative.
  • C. The number itself is always a factor.
  • D. Factors of a prime number are only 1 and the number itself.
Q. Which of the following statements about fluids is true?
  • A. Fluids can only flow in one direction
  • B. Fluids have a definite shape
  • C. Fluids can exert pressure in all directions
  • D. Fluids are incompressible
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