Major Competitive Exams

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Q. Which of the following statements about gases is true? (2022)
  • A. Gases have a definite shape and volume
  • B. Gases are incompressible
  • C. Gases fill the entire volume of their container
  • D. Gases have a fixed molecular arrangement
Q. Which of the following statements about geometric progressions is true?
  • A. The ratio of consecutive terms is constant.
  • B. The sum of terms is always positive.
  • C. The first term must be greater than the second.
  • D. The common ratio can only be an integer.
Q. Which of the following statements about geostationary satellites is true?
  • A. They orbit the Earth in a polar orbit
  • B. They have a period of 24 hours
  • C. They are closer to the Earth than low Earth orbit satellites
  • D. They can be used for global positioning
Q. Which of the following statements about gravitational potential energy (U) is true?
  • A. U increases as two masses move closer together
  • B. U decreases as two masses move closer together
  • C. U is always positive
  • D. U is independent of distance
Q. Which of the following statements about gravitational potential energy is true?
  • A. It is always positive.
  • B. It can be negative.
  • C. It is independent of the reference point.
  • D. It increases with distance.
Q. Which of the following statements about haloalkanes is true?
  • A. They are polar compounds
  • B. They are non-polar compounds
  • C. They do not react with nucleophiles
  • D. They are always solids
Q. Which of the following statements about harmonic progression is false?
  • A. The sum of the terms is finite
  • B. The terms can be negative
  • C. The terms can be zero
  • D. The terms can be fractions
Q. Which of the following statements about harmonic progression is true?
  • A. The sum of the terms is always positive.
  • B. The terms can be negative.
  • C. The terms are always integers.
  • D. The common difference is always positive.
Q. Which of the following statements about hybrid sets is true?
  • A. Hybrid sets can only contain numerical elements.
  • B. The union of two hybrid sets is always a hybrid set.
  • C. Hybrid sets cannot be empty.
  • D. The intersection of two hybrid sets is always empty.
Q. Which of the following statements about hydrogen is incorrect? (2019)
  • A. Hydrogen is the lightest element.
  • B. Hydrogen can form covalent bonds.
  • C. Hydrogen exists as a diatomic molecule in nature.
  • D. Hydrogen is a metal at room temperature.
Q. Which of the following statements about ideal solutions is true?
  • A. They obey Raoult's law at all concentrations
  • B. They have a constant boiling point
  • C. They have a constant density
  • D. They do not exhibit colligative properties
Q. Which of the following statements about inductive effect is correct?
  • A. It is a permanent effect
  • B. It is a temporary effect
  • C. It only affects alkenes
  • D. It increases basicity
Q. Which of the following statements about isomerism is FALSE?
  • A. Isomers have the same molecular formula.
  • B. Isomers have different physical properties.
  • C. Isomers have different chemical properties.
  • D. Isomers cannot exist in the same physical state.
Q. Which of the following statements about isomerism is true?
  • A. Isomers have the same molecular formula
  • B. Isomers have different molecular formulas
  • C. Isomers have the same physical properties
  • D. Isomers cannot exist in the same compound
Q. Which of the following statements about isomers is true?
  • A. Isomers have different molecular formulas
  • B. Isomers have the same connectivity of atoms
  • C. Isomers have different physical and chemical properties
  • D. Isomers cannot exist in the same compound
Q. Which of the following statements about isotopes is true?
  • A. Isotopes have the same number of protons
  • B. Isotopes have different chemical properties
  • C. Isotopes have different numbers of protons
  • D. Isotopes are always radioactive
Q. Which of the following statements about kinetic friction is true?
  • A. It is always greater than static friction.
  • B. It depends on the speed of the object.
  • C. It is independent of the contact area.
  • D. It increases with increasing normal force.
Q. Which of the following statements about lenses is true?
  • A. Concave lenses converge light rays
  • B. Convex lenses diverge light rays
  • C. Concave lenses produce virtual images
  • D. Convex lenses have negative focal lengths
Q. Which of the following statements about liquids is true?
  • A. They have a definite shape.
  • B. They are incompressible.
  • C. They have a fixed volume.
  • D. Both B and C
Q. Which of the following statements about magnetic field lines is true?
  • A. They can cross each other
  • B. They are always straight lines
  • C. They form closed loops
  • D. They originate from magnetic monopoles
Q. Which of the following statements about mesomeric effect is true?
  • A. It involves only sigma bonds.
  • B. It is a permanent effect.
  • C. It is weaker than the inductive effect.
  • D. It does not involve resonance structures.
Q. Which of the following statements about metallic bonding is true?
  • A. Electrons are localized
  • B. Electrons are delocalized
  • C. Only positive ions are present
  • D. It involves sharing of electrons
Q. Which of the following statements about molarity is true?
  • A. It changes with temperature.
  • B. It is independent of temperature.
  • C. It is defined as moles of solute per liter of solvent.
  • D. It is always equal to molality.
Q. Which of the following statements about molecular orbitals is correct?
  • A. Molecular orbitals are formed by the overlap of atomic orbitals.
  • B. Molecular orbitals can only be occupied by one electron.
  • C. Bonding molecular orbitals have higher energy than antibonding orbitals.
  • D. Molecular orbitals do not influence the shape of molecules.
Q. Which of the following statements about molecular orbitals is incorrect?
  • A. Molecular orbitals can be occupied by a maximum of two electrons.
  • B. Bonding orbitals are lower in energy than antibonding orbitals.
  • C. Molecular orbitals are formed from the linear combination of atomic orbitals.
  • D. All molecular orbitals are degenerate.
Q. Which of the following statements about molecular orbitals is true?
  • A. Molecular orbitals are formed by the overlap of atomic orbitals.
  • B. Molecular orbitals can only be occupied by one electron.
  • C. Molecular orbitals do not have any energy levels.
  • D. Molecular orbitals are only found in diatomic molecules.
Q. Which of the following statements about multiples is true?
  • A. The multiples of a number are infinite.
  • B. The multiples of a number are always positive.
  • C. The first multiple of any number is the number itself.
  • D. All of the above.
Q. Which of the following statements about number systems is true?
  • A. Base-10 is the only positional system
  • B. Base-2 can represent all integers
  • C. Base-16 is less efficient than base-10
  • D. Base-5 cannot represent fractions
Q. Which of the following statements about numeral systems is correct?
  • A. All numeral systems are based on the same principles.
  • B. Different numeral systems can represent the same value.
  • C. The decimal system is the only system used in mathematics.
  • D. Base systems are irrelevant in modern computing.
Q. Which of the following statements about numeral systems is incorrect?
  • A. Base-10 is the most commonly used system.
  • B. Base-16 is used in color codes in web design.
  • C. Base-2 is used in human languages.
  • D. Base-8 is less common than base-2.
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