Major Competitive Exams

Q. Which of the following species is reduced in the reaction 2MnO4- + 5C2O4^2- + 16H+ → 2Mn^2+ + 10CO2 + 8H2O?
  • A. MnO4-
  • B. C2O4^2-
  • C. H+
  • D. CO2
Q. Which of the following species is the strongest oxidizing agent? (2023)
  • A. F2
  • B. Cl2
  • C. Br2
  • D. I2
Q. Which of the following statements about 'probability' is true?
  • A. Probability can only be calculated for discrete events.
  • B. The sum of probabilities of all possible outcomes is always 1.
  • C. Probability is independent of the sample space.
  • D. Probability can never exceed 1.
Q. Which of the following statements about a convex lens is true?
  • A. It can only produce real images.
  • B. It can only produce virtual images.
  • C. It can produce both real and virtual images.
  • D. It has a negative focal length.
Q. Which of the following statements about a parallelogram is true? (2023)
  • A. All sides are equal.
  • B. Diagonals bisect each other.
  • C. All angles are right angles.
  • D. It has exactly one pair of parallel sides.
Q. Which of the following statements about a potentiometer is true?
  • A. It can only measure AC voltages.
  • B. It requires a constant current for accurate measurements.
  • C. It can measure both AC and DC voltages.
  • D. It is only used in laboratory settings.
Q. Which of the following statements about a rectangle is true?
  • A. All sides are equal
  • B. Opposite sides are equal and all angles are 90 degrees
  • C. Diagonals are perpendicular
  • D. Only one pair of opposite sides is equal
Q. Which of the following statements about alcohols is correct? (2022)
  • A. They are all soluble in water.
  • B. They have higher boiling points than alkanes.
  • C. They cannot form hydrogen bonds.
  • D. They are all volatile.
Q. Which of the following statements about alcohols is incorrect? (2022)
  • A. They can form hydrogen bonds.
  • B. They are generally soluble in water.
  • C. They have higher boiling points than alkanes.
  • D. All alcohols are volatile.
Q. Which of the following statements about alcohols is true?
  • A. They are always soluble in water.
  • B. They have higher boiling points than alkanes.
  • C. They cannot form hydrogen bonds.
  • D. They are less dense than water.
Q. Which of the following statements about alkanes is true?
  • A. They are highly reactive.
  • B. They are saturated hydrocarbons.
  • C. They contain double bonds.
  • D. They are polar molecules.
Q. Which of the following statements about alkenes is true?
  • A. They are saturated hydrocarbons.
  • B. They can undergo polymerization.
  • C. They do not react with electrophiles.
  • D. They have a higher boiling point than alkanes.
Q. Which of the following statements about alkynes is incorrect?
  • A. They are unsaturated hydrocarbons.
  • B. They contain at least one triple bond.
  • C. They are more reactive than alkenes.
  • D. They have a higher boiling point than alkenes.
Q. Which of the following statements about alkynes is true?
  • A. They are less acidic than alkenes.
  • B. They can undergo polymerization.
  • C. They have a higher boiling point than alkenes.
  • D. They are more stable than alkenes.
Q. Which of the following statements about amines is incorrect?
  • A. Amines are basic in nature.
  • B. Amines can form salts with acids.
  • C. Amines have higher boiling points than alcohols.
  • D. Amines can act as nucleophiles.
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 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 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
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