Free Kinetic Molecular Theory MCQs with Answers
122 Kinetic Molecular Theory MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Kinetic molecular theory explains gases as rapidly moving particles separated by large distances, with negligible volume and negligible intermolecular attraction in the ideal model. It relates temperature to average kinetic energy and explains gas pressure, Boyle's and Charles's laws, diffusion, effusion and the conditions under which real gases deviate from ideal behavior.
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122 questions · page 6 of 7
- A. Kinetic theory of gases
- B. Crystal field theory
- C. Molecular orbital theory
- D. Transition state theory
Explanation: KMT of gases suggests that idea that molecules are in constant motion
Correct answer: Kinetic theory of gases- A. Translational motion
- B. Vibrational motion
- C. Rotational motion
- D. Linear motion
Explanation: OPTION A: There is no translational motion in solids due to strong intermolecular forces.OPTION B: According to Kinetic Molecular…
Correct answer: Vibrational motion103. The existence of matter in our surrounding in different states is due to the difference of -------
- A. Repulsive force
- B. Interacting force
- C. Creative force
- D. None of these
Explanation: Option B is correct since each state of matter has a different strength of interacting forces; the strength of the force is maximum in…
Correct answer: Interacting force- A. High
- B. Low
- C. Moderate
- D. Same
Explanation: The effusion of a gas is its movement through an extremely small opening of molecular size into a region of low pressure.
Correct answer: Low- A. Berzelius
- B. William Crooks
- C. Dalton
- D. Rutherford
Explanation: The existence of 'the fourth state of matter' was first identified by Sir William Crookes in 1879.
Correct answer: William Crooks- A. High
- B. Low
- C. Moderate
- D. Same
Explanation: Effusion is the movement of a gas, from a region of high pressure, through an extremely small opening of molecular size into a region of…
Correct answer: Low- A. Low temperature
- B. High temperature
- C. Low pressure
- D. High pressure
Explanation: Plasma is an ionized gas that only occurs at "high temperatures" so it is difficult to maintain it at "low temperatures".
Correct answer: Low temperature- A. Graham's
- B. Charles's
- C. Boyle's
- D. None of these
Explanation: Effusion refers to the movement of gas particles through a small hole. Graham's Law states that the effusion rate of a gas is inversely…
Correct answer: Graham's- A. 30
- B. 99
- C. 50
- D. 80
Explanation: Explanation:The plasma is in four states of matter. It consists of neutral particles, positive ions, and negative electrons.
Correct answer: 99- A. Molar mass
- B. Temperature
- C. Pressure
- D. Volume
Explanation: A is correct as r.m.s velocity of gases is inversely proportional to the square root of their molar masses.B is incorrect as r.m.s…
Correct answer: Molar mass- A. Ions and electrons
- B. Electrons and neutral atoms
- C. Electrons, ions and neutral atoms
- D. Ions and neutral atoms
Explanation: A is incorrect as plasma is composed of ions,electrons and neutrals atoms.B is incorrect as plasma is composed of ions,electrons and…
Correct answer: Electrons, ions and neutral atoms- A. Neon
- B. Nitrogen
- C. Oxygen
- D. Fluorine
Explanation: Molar Mass: Approximately 20.18 g/mol.Density: Neon is a noble gas with a low molar mass, resulting in a low density compared to the other…
Correct answer: Neon- A. rNH3 /rCO2 =1/1.6
- B. rNH3 /rCO2 =1.6/1
- C. rCO2 /rNH3 = 1/1.6
- D. None of these
Explanation: In this question, we don't have to apply Grahm's law cuz it is far simple What they said, rNH3=1.6(rCO2) ,the questions word in equation…
Correct answer: rNH3 /rCO2 =1.6/1- A. Helium
- B. Hydrogen
- C. Nitrogen
- D. Neon
Explanation: This concept is related to the process of effusion.Effusion is the process in which a gas escapes from a container through a hole of a…
Correct answer: Hydrogen- A. diffusion
- B. viscosity
- C. density
- D. none of the above
Explanation: Diffusion is the net movement of gases from a region of higher concentration to a region of lower concentration.
Correct answer: diffusion- A. at the center of the tube
- B. near the NH3 bottle
- C. near the HCl bottle
- D. throughout the length of the same tube
Explanation: When connecting the two bottles, the two gases will diffuse into each other.The rate of diffusion is inversely proportional to the square…
Correct answer: near the HCl bottle- A. H
- B. He
- C. Ne
- D. Xe
Explanation: Hydrogen is the only gas listed that is diatomic, meaning its molecules consist of two atoms (H2).
Correct answer: H- A. 8.0 ms-1
- B. 6.0 ms-1
- C. 5.0 ms-1
- D. 7.0 ms-1
Explanation: To find the root-mean-square (RMS) speed of the gas molecules, use the formula:Vrms = √((v1^2 + v2^2 + v3^2 + v4^2) / total number of…
Correct answer: 8.0 ms-1- A. The plasma contains an equal amount of positive and negative charges and is almost neutral as a whole.
- B. Plasma exists in the atmosphere of stars.
- C. Plasma exists in the region around the sun.
- D. There is less matter in the plasma state than in the solid, liquid, and gaseous states.
Explanation: Plasma is the highest energy state of matter. It consists of a collection of free-moving electrons, positive ions and neutral particles.
Correct answer: There is less matter in the plasma state than in the solid, liquid, and gaseous states.- A. The average kinetic energy of the molecules depends on the volume in which the gas is enclosed.
- B. The average kinetic energy of the molecules in the gaseous state is proportional to the pressure.
- C. The average kinetic energy of the molecules in the gaseous state is proportional to the temperature.
- D. All of the above
Explanation: Kinetic energy is the energy a substance has because of its molecules being in motion, as a substance absorbs heat its molecules move…
Correct answer: The average kinetic energy of the molecules in the gaseous state is proportional to the temperature.