States of matter- NEET Previous Year Questions with Solutions and Weightage

States of matter is an important unit of Physical Chemistry with 2-3 questions expected from this unit. The different characteristics of matter enable us to classify them into- solids, liquids and gases, liquids. The other state in which matter can be found is called Plasma, Bose-Einstein Condensate and neutron degenerate matter. For the NEET topic of "States of Matter," specifically focusing on Gas Laws and the Van der Waals Equation, understand that the ideal gas law (PV=nRT) and the Van der Waals equation (P + an²/V²)(V - nb) = nRT. 

Important links related to this topic:

• States of Matter: Definition, Types and Difference
• Changing States of Matter Questions
• Change of State: Melting Point, Boiling Point, Applications

Listed below is the list of States of matter questions with detailed solutions asked in NEET :

Question 1:

The work done during reversible isothermal expansion of one mole of hydrogen gas at 25oC from a pressure of 20 atm to 10 atm is:

(Given R = 2.0 cal K-1 mol-1)

• 0 calorie
• -413.14 calories
• 413.14 calories
• 100 calories

View Solution

Question 2:

The Henry’s law constant (KH) values of three gases (A, B, C) in water are 145, 2 × 10–5 and 35 kbar, respectively. The solubility of these gases in water follow the order :

• B > A > C
• B > C > A
• A > C > B
• A > B > C

View Solution

Question 3:

Intermolecular forces are forces of attraction and repulsion between interacting paiticles that will include :

A. dipole - dipole forces.

B. dipole - induced dipole forces.

C. hydrogen bonding.

D. covalent bonding.

E. dispersion forces.

Choose the most appropriate answer from the options given below :

• A, B, C, D are correct.
• A, B, C, E are correct.
• A, C, D, E are correct.
• B, C, D, E are correct.

View Solution

Question 4:

Which among the following options is the correct graphical representation of Boyle's Law?

View Solution

Question 5:

A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 L bar K-1 mol-1)

• 2.5
• 498.6
• 49.8
• 4.9

View Solution

Question 6:

For irreversible expansion of an ideal gas under isothermal condition, the correct option is

• ∆U≠0, ∆Stotal=0
• ∆U=0, ∆Stotal=0
• ∆U≠0, ∆Stotal≠0
• ∆U=0, ∆Stotal≠0

View Solution

Question 7:

Choose the correct option for the total pressure (in atm.) in a mixture of 4 g O2 and 2 g H2 confined in a total volume of one litre at 08C is : [Given R=0.082 L atm mol−1K−1, T=273 K]

• 26.02
• 2.518
• 2.602
• 25.18

View Solution

Question 8:

The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is

• 3
• 7
• 5
• 2

View Solution

Question 9:

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :

• Z< 1 and attractive forces are dominant
• Z < 1 and repulsive forces are dominant
• Z > 1 and attractive forces are dominant
• Z > 1 and repulsive forces are dominant

View Solution

NEET Chemistry Exam Pattern 2024: Marking Scheme

Candidates will get 4 marks for every correct answer. 1 mark will be deducted for every incorrect answer. No mark will be rewarded for unattempted questions. Candidates are advised not to fill in more than one option in the OMR sheet. If they do so then that question will be considered incorrect and you will get negative marks.

Important Topics for NEET Chemistry

NEET chemistry syllabus can be divided into 3 parts i.e Organic, Inorganic, and Physical Chemistry. The weightage of questions asked from each section is almost the same every year.

• NEET Physical Chemistry: It’s the numerical section of NEET Chemistry.
• NEET Organic Chemistry: From this section, you must focus on memorizing the names of various compounds that constitute reagents, subtracts, etc.
• NEET Inorganic Chemistry: This section is considered the easiest section of NEET Chemistry.

NEET Chemistry Exam Pattern 2024: Chapter wise weightage

Based on the questions asked in previous years we have tabulated the weightage of sections or topics given to class XII and XII:

NEET 2024 Question Paper PDF Code R

NEET 2024 Question Paper PDF Code Q

NEET 2024 Question Paper PDF Code T

NEET 2024 Question Paper PDF Code S

NEET Re-Exam June 23 Question Paper

NEET Subject Wise Question Paper 2024 PDF with Answer Key and Solution

NEET Sample Paper 2024 PDF Download with Answer

Students must not confuse this sample paper with the actual question paper. This is just a mock paper with answers that will help you with your exam preparation.

NEET 2025: Previous Year Question Papers

Given below are the year-wise question paper for NEET examination:

Frequently Asked Questions:

Q1 : Is state of matter removed in NEET 2025?

No, the state of matter topic is not removed in NEET 2025. It remains the moderate weightage topic in the exam and is an important unit of Physical Chemistry with 2-3 questions expected .

Here's a breakdown of the NEET 2025 syllabus and why "States of Matter" is still important:

NEET chemistry syllabus can be divided into 3 parts i.e Organic, Inorganic, and Physical Chemistry. The weightage of questions asked from each section is almost the same every year.

• NEET Physical Chemistry: It’s the numerical section of NEET Chemistry.
• NEET Organic Chemistry: From this section, you must focus on memorizing the names of various compounds that constitute reagents, subtracts, etc.
• NEET Inorganic Chemistry: This section is considered the easiest section of NEET Chemistry.

Q2. What type of questions on Van der Waals equation are common in NEET?

The Intermolecular forces, excluded volume and numerical questions on Real Gas Deviations which ranges from 30-35%.

• Example: Calculate the compressibility factor (Z) for a gas using the Van der Waals equation at given pressure and temperature.

The expected number of questions from this topic in the past 10 years has been 3 to 4 times higher than usual.

Q3. How to remember the critical temperature, pressure, and volume of gases?

To remember the critical temperature, pressure, and volume of gases for NEET, you can follow these strategies:

1. Use Mnemonics: Create simple mnemonics helps recall the values. For example, to remember the critical temperature, pressure, and volume of gases, make a shortcut or a phrase.
2. Group Similar Gases Together: Study the values of gases in groups based on their properties. For example, noble gases, light gases like hydrogen, and heavy gases like carbon dioxide will have distinct values. Grouping similar gases together can help make the information easier to remember.
3. Understand the Concept: Understanding why gases have different values based on their forces can help to remember the information. Gases with strong intermolecular forces, like carbon dioxide, have higher critical values compared to gases with weak intermolecular forces, like hydrogen.

Practice regularly as it improves with the regular revision. Test yourself frequently on the critical temperature, pressure, and volume of various gases to strengthen your memory.

Q4. Which is more important for NEET: Boyle’s law, Charles’ law, or Avogadro’s law?

For NEET, Boyle's Law, Charles' Law, and Avogadro’s Law are all important, but the importance can vary based on the types of questions typically asked in the exam.

1. Boyle’s Law (Pressure-Volume relationship):

   It is frequently tested in NEET, especially in numerical problems involving changes in pressure and volume, making it highly important.

2. Charles’ Law (Temperature-Volume relationship):

   This law is important for understanding gas behavior under varying temperature conditions, and it is often tested in conceptual and numerical questions.

3. Avogadro’s Law (Volume-Mole relationship):

   While this law is fundamental, it is often covered under the Ideal Gas Law and is slightly less frequently tested individually.

While all three laws are important, Boyle's Law and Charles' Law are typically more frequently tested in NEET in both numerical and conceptual questions. Understanding these laws thoroughly is essential, as they form the foundation for more advanced topics like the Ideal Gas Law and the Van der Waals Equation, which are often asked in the exam.