Chemistry Syllabus (JEE Main)

Q. A ladder leans against a wall and is in equilibrium. What forces are acting on the ladder?
  • A. Weight, normal force from the ground, and friction
  • B. Only weight and normal force
  • C. Only weight and friction
  • D. Only normal force and friction
Q. A particle is in equilibrium under the action of three forces. If two forces are known, how can the third force be determined?
  • A. By vector addition of the first two forces
  • B. By subtracting the first two forces
  • C. By multiplying the first two forces
  • D. By taking the average of the first two forces
Q. A solution contains 20% (w/w) of glucose. If the total mass of the solution is 200 g, what is the mass of glucose in the solution?
  • A. 20 g
  • B. 40 g
  • C. 60 g
  • D. 80 g
Q. A solution has a concentration of 0.1 M NaCl. How many grams of NaCl are present in 1 liter of this solution? (Molar mass of NaCl = 58.5 g/mol)
  • A. 5.85 g
  • B. 58.5 g
  • C. 0.1 g
  • D. 0.585 g
Q. A solution has a concentration of 0.2 M. How many moles of solute are present in 1.5 L of this solution?
  • A. 0.3 moles
  • B. 0.5 moles
  • C. 0.2 moles
  • D. 0.15 moles
Q. A solution has a density of 1.2 g/mL and contains 10% (w/v) NaOH. What is the mass of NaOH in 1 L of this solution?
  • A. 100 g
  • B. 120 g
  • C. 80 g
  • D. 60 g
Q. A solution has a density of 1.2 g/mL and contains 30 g of solute. What is the molarity if the molar mass of the solute is 60 g/mol?
  • A. 0.5 M
  • B. 1 M
  • C. 2 M
  • D. 1.5 M
Q. A solution is prepared by dissolving 50 g of glucose (C6H12O6) in 250 g of water. What is the mass percent of glucose in the solution? (Molar mass of glucose = 180 g/mol)
  • A. 20%
  • B. 15%
  • C. 25%
  • D. 10%
Q. A solution is prepared by dissolving 58.5 g of NaCl in 1 L of water. What is the concentration in terms of molarity? (Molar mass of NaCl = 58.5 g/mol)
  • A. 1 M
  • B. 2 M
  • C. 0.5 M
  • D. 0.25 M
Q. A solution is prepared by dissolving 58.5 g of NaCl in 1 L of water. What is the molarity of the solution? (Molar mass of NaCl = 58.5 g/mol)
  • A. 1 M
  • B. 2 M
  • C. 0.5 M
  • D. 0.1 M
Q. A solution is prepared by dissolving 58.5 g of NaCl in enough water to make 1 L of solution. What is the molarity of the solution? (Molar mass of NaCl = 58.5 g/mol)
  • A. 1 M
  • B. 2 M
  • C. 0.5 M
  • D. 0.1 M
Q. A solution of 0.1 molal urea in water has a freezing point depression of how much? (K_f for water = 1.86 °C kg/mol)
  • A. 0.186 °C
  • B. 0.372 °C
  • C. 0.186 K
  • D. 0.372 K
Q. According to Boyle's law, if the volume of a gas is doubled at constant temperature, what happens to the pressure?
  • A. It doubles
  • B. It halves
  • C. It remains constant
  • D. It quadruples
Q. According to Boyle's law, if the volume of a gas is doubled, what happens to its pressure?
  • A. It doubles
  • B. It halves
  • C. It remains constant
  • D. It quadruples
Q. According to Graham's law of effusion, the rate of effusion of a gas is inversely proportional to what?
  • A. Molar mass
  • B. Temperature
  • C. Pressure
  • D. Volume
Q. According to the ideal gas law, which of the following is the correct equation?
  • A. PV = nRT
  • B. PV = nR
  • C. P = nRT/V
  • D. V = nP/RT
Q. According to the kinetic molecular theory, which of the following statements is true?
  • A. Gas particles have significant volume.
  • B. Gas particles are in constant motion.
  • C. Gas particles attract each other.
  • D. Gas particles do not collide.
Q. According to VSEPR theory, what is the shape of the molecule with the formula AX2E2?
  • A. Linear
  • B. Bent
  • C. Trigonal planar
  • D. Tetrahedral
Q. At constant temperature and pressure, if ΔH is positive and ΔS is negative, what can be said about ΔG?
  • A. ΔG is positive
  • B. ΔG is negative
  • C. ΔG is zero
  • D. ΔG can be either positive or negative
Q. At constant temperature and pressure, if ΔH is positive and ΔS is negative, what is the sign of ΔG?
  • A. Always negative
  • B. Always positive
  • C. Depends on temperature
  • D. Zero
Q. At constant temperature, the volume of a gas is inversely proportional to its pressure. This is known as which law?
  • A. Boyle's Law
  • B. Charles's Law
  • C. Avogadro's Law
  • D. Ideal Gas Law
Q. At what temperature does a reaction become spontaneous if ΔH = 50 kJ and ΔS = 0.1 kJ/K?
  • A. 500 K
  • B. 250 K
  • C. 1000 K
  • D. 200 K
Q. At what temperature does the Gibbs Free Energy change from negative to positive?
  • A. At absolute zero
  • B. At the melting point
  • C. At the boiling point
  • D. At the transition temperature
Q. At what temperature does the volume of a gas become zero according to Charles's Law?
  • A. 0 K
  • B. -273.15 °C
  • C. 273.15 K
  • D. None of the above
Q. Calculate the molality of a solution if the boiling point elevation is 1.024 °C. (K_b for water = 0.512 °C kg/mol)
  • A. 1 mol/kg
  • B. 2 mol/kg
  • C. 0.5 mol/kg
  • D. 0.25 mol/kg
Q. Calculate the pH of a 0.1 M acetic acid solution (Ka = 1.8 x 10^-5).
  • A. 2.87
  • B. 3.87
  • C. 4.87
  • D. 5.87
Q. Calculate the pH of a buffer solution containing 0.1 M acetic acid and 0.1 M sodium acetate.
  • A. 4.76
  • B. 5.76
  • C. 6.76
  • D. 7.76
Q. For a first-order reaction, if the half-life is 10 minutes, what will be the half-life if the initial concentration is doubled?
  • A. 10 minutes
  • B. 5 minutes
  • C. 20 minutes
  • D. 15 minutes
Q. For a first-order reaction, the half-life is independent of the initial concentration. What is the expression for half-life?
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/2
Q. For a first-order reaction, the half-life is independent of which of the following?
  • A. Initial concentration
  • B. Rate constant
  • C. Temperature
  • D. All of the above
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