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NEET - Grade 12 - Chemistry - Chemical Kinetics - Introduction and Snapshot of Chemical Kinetics - Study ref# 860
Introduction: Chemistry, by its very nature, is concerned with change. Substances with well-defined properties are converted by chemical reactions into other substances with different properties. For any chemical reaction, chemists try...
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NEET - Grade 12 - Chemistry - Chemical Kinetics - Introduction and Snapshot of Chemical Kinetics - Study ref# 861
Following sections must be covered to understand the Chemical Kinetics: 1. Rate of a Chemical Reaction 2. Factors Influencing Rate of a Reaction 3. Integrated Rate Equations 4. Pseudo First Order Reaction 5. Temperature Dependenc...
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NEET - Grade 11 - Chemistry - States of Matter - Importance and Snapshot of States Of Matter - Study ref# 663
Following sections must be covered to understand the States Of Matter: 1. Intermolecular Forces 2. Thermal Energy 3. Intermolecular Forces vs Thermal Interactions 4. The Gaseous State 5. The Gas Laws 6. Ideal Gas Equation 7...
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NEET - Grade 11 - Physics - Kinetic Theory - Importance and Snapshot of Kinetic Theory - Study ref# 727
Introduction: Boyle discovered the law named after him in 1661. Boyle, Newton and several others tried to explain the behavior of gases by considering that gases are made up of tiny atomic particles. The actual atomic theory got establ...
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NEET - Grade 11 - Physics - Kinetic Theory - Importance and Snapshot of Kinetic Theory - Study ref# 728
Following sections must be covered to understand Kinetic Theory: 1. Introduction 2. Molecular nature of matter 3. Behaviour of gases 4. Kinetic theory of an ideal gas 5. Law of equipartition of energy 6. Specific heat capacity...
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NEET - Grade 11 - Physics - Kinetic Theory - Target Setup for Kinetic Theory - Study ref# 729
Student requires to achieve the following milestones to get better grip over Kinetic Theory. The milestones / targets are as follows:- Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 878
What happens when a compressed gas pushes a piston out and expands? Answer: When a compressed gas pushes a piston out, the speed of the molecules decreases. Their kinetic energy decreases. Hence temperature of the gas decreases....
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 879
Two different gases have exactly the same temperature. Does this mean that their molecules have the same rms speed? Answer: No, when the two gases have exactly the same temperature, the average kinetic energy per molecule
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 880
A gas enclosed in a vessel has pressure P, volume V and absolute temperature T. write the formula for number of molecules N of the gas. Answer: From
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 881
Distinguish between average speed and rms speed. If three molecules have speeds
, what will be their average speed and rms speed? Answer: Average speed is the arithmetic mean of the speeds of ...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 882
The rms speed of oxygen molecule
at a certain temperature T is v. if temperature is doubled and oxygen gas dissociates into atomic oxygen, what is the speed of atomic oxygen? Answer: If mass ...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 883
A gas is filled in a cylinder fitted with a piston at a definite temperature and pressure. Explain on the basis of kinetic theory, the pressure of the gas increases by rising its temperature. Answer: On rising the temperature, the rms velocity ...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 884
There are N molecules of a gas in a container. If this number is increased to 2N, what will be (i) pressure (ii) total energy (iii) rms speed of the gas? Answer: (i) As,
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 885
On which of the following factors does the average kinetic energy of gas molecules depend? (i) Nature of the gas, (ii) absolute temperature, (iii) volume. What will be its value at the absolute zero? Answer: The average kinetic energy of gas mo...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 886
What do you mean by degrees of freedom? State the law of equipartition of energy. Answer: Degrees of freedom: For a dynamical system, degrees of freedom is the total number of independent co-ordinates required to describe completely the p...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 887
Calculate the molar specific heats of monoatomic gases. And hence find the value of
. Answer: A molecule of monoatomic gas has three degrees of freedom. Average energy per molecule = <...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 888
Calculate the molar specific heats of diatomic gases. And hence find the value of
. Answer: A diatomic molecule has 5 degrees of freedom, 3 translational and 2 rotational. Average e...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 889
Calculate the specific heats of triatomic gases. And hence find the value of
. Answer:
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 890
A gas in a vessel is at the pressure
. If the masses of all the molecules be made half and their speeds be made double, then find the resultant pressure. Answer: We know,
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 891
Explain the meaning of mean speed, root mean square speed and most probable speed. Answer: Mean Speed: It is the average speed with which a molecule of the gas moves. From Maxwellian speed distribution law,
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 892
Show that rms velocity of O2 molecules is
times that of SO2. Atomic weight of sulphur is 32 gm and atomic weight of oxygen is 16. Answer: As rms velocity at a given temperature
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 893
Show that specific heat od a solid is equal to 3R, where R is the universal gas constant. Answer: Let us consider 1 gram mole of the solid containing
atoms. Each atom vibrates about its mean p...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 894
The velocities of three molecules are 3v, 4v and 5v. Calculate their root mean square velocity. Answer:
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 895
Explain the phenomenon of evaporation on the basis of kinetic theory. Answer: According to kinetic theory, molecules of a liquid are in a state of continuous random motion. The molecules near the surface of liquid may have enough kinetic ene...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 896
For an ideal gas, internal energy can only be translational K.E. Why? Answer: In an ideal gas, there is no force of attraction / repulsion among the molecules. Therefore, the molecules do not have any internal potential energy. We know, ...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 897
Two perfect gases at temperatures
and
are mixed. There is no loss of energy. Find the temperature of mixture if masses of molecules are
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 898
Two vessels of same volume are filled with the same gas at the same temperature. If the pressure of the gas in these vessel be in the ratio 1:2, then state : (i) the ratio of the rms speeds of the molecules, (ii) the ratio of the numbe...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 899
What do you mean by Boltzmann constant? Calculate its value in SI units. Answer: Boltzmann constant
Where R is universal gas constant and
...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 900
Write the dimensional formula for R used in the ideal gas equation PV = RT. Answer: We get
So,
...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 901
One mole of a monoatomic gas is mixed with three moles of a diatomic gas. What is the molecular specific heat of mixture at constant volume? R =
Answer: Here n = 1 mole,
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 902
A vessel of volume 5 litre contains 1.4 gm of nitrogen at 1800 K. if 30% of its molecules are dissociated into atoms at this temperature, what would be the pressure of the gas? Answer: Here,
...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 903
Calculate kinetic energy per molecule and also rms velocity of a gas at
Given
and mass of each molecule
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 904
Calculate (i) rms speed and (ii) mean kinetic energy of one gram molecule of hydrogen at STP. Given density of hydrogen at STP is
Answer: Here,
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 905
Estimate the average thermal energy of a helium atom at (i) room temperature
(ii) the temperature on the surface of the sun
(iii...
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 906
The density of carbon dioxide gas at
and at pressure
is 1.98 kg m-3, find the rms velocity of its molecules at
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NEET - Grade 11 - Physics - Kinetic Theory - Study ref# 907
How many degrees of freedom are associated with 2 gm of He at NTP? Calculate the amount of heat energy required to raise the temperature of this gas from
to . Answer: Number of molecule sin 2...
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NEET - Grade 11 - Physics - Waves - Study ref# 1061
Set up a relation between speed of sound in a gas and root mean square velocity of the molecules of that gas. Answer: Speed of sound in a gas
----------- (i) According to...
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NEET - Grade 11 - Chemistry - States of Matter - Study ref# 1413
One of the assumptions of kinetic theory of gases states that “there is no force of attraction between the molecules of a gas.” How far is this statement correct? Is it possible to liquefy an ideal gas? Explain. Answer: This statement is cor...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10691
Two monochromatic radiations of frequencies and (and) and having the same intensity are, in turn, incident on a photosensitive surface to cause photoelectric emission. Explain, giving reason, in which case (i) more number of electron...
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