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31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - NEET MCQ


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20 Questions MCQ Test Chemistry Class 11 - 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT)

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) for NEET 2024 is part of Chemistry Class 11 preparation. The 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) questions and answers have been prepared according to the NEET exam syllabus.The 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) below.
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31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 1

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 0°C is: 
[Given R=0.082 L atm mol-1 K-1, T=273 K]    [2021]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 1

Hint: PV = nRT
Step 1:
The given values are as follows:
The amount of O2 is 4 g and the amount of H2 is 2 g. Calculate the number of moles of O2 and H2 is as follows:

number of mole O2 = 4/32
number of mole O2 = 0.125 mol
number of mole H2 = 2/2
number of mole H2 = 1 mol
Step 2:
Calculate the value of total pressure is as follows:
P× 1 = 1.125 × 0.0821 × 273
P = 25.18 atm

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 2

A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is:     [2020]
[Use atomic masses (in g mol-1): N = 14, Ar = 40]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 2

According to Dalton’s law

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31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 3

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 :    [2019]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 3

Compressibility factor(Z) 
∵ Vreal < Videal; Hence Z < 1
If Z < 1, attractive forces are dominant among gaseous molecules and liquefaction of gas will be easy.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 4

What is the density of N2 gas at 227°C and 5.00 atm pressure? (R = 0.0821 atm K–1 mol–1) [NEET Kar. 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 4

Density =  3.41g/ml

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 5

Maximum deviation from ideal gas is expected from : [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 5

Higher the critical temperature more easily will be the gas liquify.  Now since most easily liquifiable gas show larger deviation, NH3 will show maximum deviation from ideal behaviour.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 6

Dipole-induced dipole interactions are present in which of the following pairs : [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 6

This type of attractive force operates between the polar molecules having permanent dipole and the molecules lacking permanent dipole.
HCl is polar (μ ≠ 0) and He is non polar (μ = 0), thus gives dipole-induced dipole interaction.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 7

50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar condition. If molecular mass of gas B is 36, the molecular mass of gas A will be : [2012]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 7

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 8

A bubble of air is underwater at temperature 15°C and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25°C and the pressure is 1.0 bar, what will happen to the volume of the bubble ? [2011M]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 8

Given 1 = 1.5 bar T1 = 273 + 15 = 288 K V1 = V
P2 = 1.0 bar T1 = 273 + 25 = 298K V2 = ?

V2 = 1.55 V i.e., volume of bubble will be almost 1.6 time to initial volume of bubble.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 9

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition ? [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 9

For free expansion of an ideal gas under adiabatic condition q = 0, ΔT = 0 , w = 0

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 10

Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be : [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 10

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 11

A gaseous mixture was prepared by taking equal mole of CO and N2. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is :   [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 11

Given nCO = nN2 PCO + PN2 = 1 atm

Partial pressure of a gas = mole fraction of gas × total pressure

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 12

By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled ? [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 12

Average velocity = 

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 13

Three moles of an idea l gas expanded spontaneously into vacuum. The work done will be :[2010]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 13

Ideal gas during spontaneous expansion into vacuum does not do any external work.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 14

If a gas expan ds at constan t temperature, it indicates that : [2008]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 14

At an y constan t temper ature the K.E. of gaseous molecules remains same. (K.E. ∝ T).
Thus option (c) is correct answer.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 15

The surface tension of which of the following liquid is maximum? [2005]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 15

Due to intermolecular H-bonding the surface tension of H2O is more than other liquid. One H2O molecule is joined with 4 another H2O molecule through H–bond.
Hydrogen bonding is in order H2O > C2H5OH > CH3OH.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 16

Van der Waal's real gas, act as an ideal gas, at which conditions? [2002]

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 16

At higher temperature and low pressure real gas acts as an ideal gas

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 17

Which of the following expressions correctly represents the relationship between the average molar kinetic energy,  of  CO and N2 molecules at the same temperature ?

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 17

 because

 It does not depend upon the nature of the gas.

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 18

The pressure exerted by 6.0g of methane gas in a 0.03 m3 vessel at 129°C is (Atomic masses : C = 12.01, H = 1.01 and R = 8.314 JK–1 mol –1)

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 18

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 19

certain gas takes three times as long to effuse out as helium. Its molecular mass will be 

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 19

31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 20

For real gases van der Waals equation is written as

where ‘a’ and ‘b’ are van der Waals constants.
Two sets of gases are :

(I) O2, CO2, H2 and He

(II) CH4, O2 and H2

The gases given in set-I in increasing order of ‘b’ and gases given in set-II in decreasing order of ‘a’, are arranged below. Select the correct order from the following : 

Detailed Solution for 31 Year NEET Previous Year Questions: States of Matter - 1 (Old NCERT) - Question 20

Van der Waal gas constant 'a' represent intermolecular force of attraction of gaseous molecules and Van der Waal gas constant 'b' represent effective size of molecules. Therefore order should be (I) H2 < He < O2 < CO2 

(II) CH4 > O2 > H2

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