STATES OF MATTER Quiz-5

STATES OF MATTER QUIZ-5

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. The compressibility of a gas is less than unity at STP; therefore,

•  V_m > 22.4 L
•  V_m < 22.4 L
•  V_m =22.4
•  V_m =44.8 L

Solution:

Q2. At the top of the mountain, the thermometer reads 0℃ and the barometer reads 710 mrn Hg. At the bottom of the mountain the temperature is 30℃ and the pressure is 760 mm Hg. The ratio of the density of air at the top with that at the bottom is

•  1 : 1
•  1.04 : 1
•  1 : 1.04
•  1 : 1.5

Solution:

Q3.  There is a depression in the surface of the liquid in a capillary when

•  The cohesive force is smaller than the adhesive force
•  The cohesive force is greater than the adhesive force
•  The cohesive and adhesive force are equal
•  None of the above is true

Solution:

Q4.  3.2 g oxygen is diffused in 10 min. In similar conditions, 2.8 g nitrogen will diffuse in

•  9.3 min
•  8.2 min
•  7.6 min
•  11.8 min

Solution:

Q5.Virial equation is: PV_M = RT [A + B/V_M + C/V_M² + ---],where A,B,C,… are first second, third,… virial coefficient, respectively, For an ideal gas

•  A= unity and B,C are zero
•  A,B,Care all equal to unity
•  A is dependent of temperature
•  All A,B,C depend on temperature

Solution:

Q6. A sample of gas occupies 100 mL at 27℃ and 740 mm pressure. When its volume is changed to 80 mL at 740 mm pressure, the temperature of the gas will be

•  21.6℃
•  240℃
• -33℃
•  89.5℃

Solution:

Q7.The rms velocity of hydrogen is √7 times the rms velocity of nitrogen. If T is the temperature of the gas, then

•  T_H2=T_N2
•  T_H2 > T_N2
•  T_H2 < T_N2
•  T_H2= √7 T_N2

Solution:

Q8.Ideal gas equation in terms of KE per unit volume, E, is

•  3/2 RT
•  2/3 E
•  2/3 RT
•  3/2 E

Solution:

Q9.A quantity of heat is confined in a chamber of constant volume. When the chamber is immersed in a bath of melting ice, the pressure of the gas is 1000 torr. Final temperature when the pressure manometer indicates an absolute pressure of 400 torr is

•  109 K
•  273 K
•  373 K
•  0 K

Solution:

Q10. The pressure exerted by 1 mol of CO₂ at 273 K is 34.98 atm. Assuming that volume occupied by CO₂ molecules is negligible, the value of van der Waals’ constant for attraction of CO₂ gas is

•  3.59 dm⁶ atm mol^-2
•  2.59 dm⁶ atm mol^-2
•  1.25 dm⁶ atm mol^-2
•  1.59 dm⁶ atm mol^-2

Solution: