STATES OF MATTER Quiz-3

STATES OF MATTER QUIZ-3

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.

Q1. Number of N₂ molecules present in L vessel at NTP when compressibility factor is 1.2 is

•  2.23×10²⁴
•  2.23×10²²
•  2.7×10²²
•  2.7×10²⁴

Solution:

Q2.A gas in an open container is heated from 27℃ to 127℃. The fraction of the original amount of the gas escaped in the container will be

•  3/4
•  1/2
•  1/4
•  1/8

Solution:

Q3.  Which of the following statements is not correct about the three states of matter, i.e., solid, liquids and gas?

•  Molecules of a solid possess least energy whereas those of a gas possess highest energy
•  The density of a solid is highest whereas that of gases is lowest
•  Gases like liquids possess definite volumes
•  Molecules of a solid possess vibratory motion

Solution:

Q4.  Relative humidity of air is 60° and the saturation vapour pressure of water vapour in air is 3.6 kPa. The amount of water vapours present in 2 L air at 300 K is

•  52 g
•  31.2 g
•  26 g
•  5.2 g

Solution:

Q5. At constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with the rise in temperature due to

•  Increase in average molecular speed
•  Increase in the rate of collisions among the molecules
•  Increase in the molecular attraction
•  Decrease in the mean free path

Solution:

Q6. Which of the following expression at constant pressure represents Charles’ law?

•  V ∝ 1/T
•  V ∝ 1/T²
• V ∝ T
•  V = d

Solution:

Q7.At 25℃ and 730 mm pressure, 730 mL of dry oxygen was collected. If the temperature is kept constant what volume will oxygen gas occupy at 760 mm pressure?

•  701 mL
•  449 mL
•  569 mL
•  621 mL

Solution:

Q8.Distribution of molecules with velocity is represented by the curve

Velocity corresponding to point A is

•  √3RT/M
•  √2RT/M
•  √8RT/π M
•  √RT/M

Solution:

Q9.The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

•  Pressure of the gas
•  Temperature of the gas
•  Volume of the gas
•  Pressure, temperature, and volume of the gas

Solution:

Q10. For 1 mol of an ideal gas, V₁ > V₂ > V₃ in Fig. (I), T₁ > T₂ > T₃ in Fig. (II), P₁ > P₂ > P₃ in Fig. (III), and T₁ > T₂ > T₃ in Fig. (IV), then which curves are correct

•  I, II
•  I, II, III
•  II, IV
• I, III, IV

Solution: