NEET Chemistry Chapter Wise Mock Test – States of Matter ( Gaseous and Liquid State)
A cylinder of 5 L capacity, filled with air at NTP is connected with another evacuated cylinder of 30 L of capacity. The resultant air pressure in both the cylinders will be
(a) 10.8 cm of Hg
(b) 14.9 cm of Hg
(c) 21.8 cm of Hg
(d) 38.8 cm of Hg
A plot of volume (V) versus temperature (T) for a gas at constant pressure is a straight line passing through the origin. The plots at different values of pressure are shown in the figure. Which of the following order of pressure is correct for this gas?
(b)p1 = p2 = p3 = p4
(c) p1< p2 < p3 < p4
(d) p1 < p2 = p3 < p4
A person living in Shimla observed that cooking food without using pressure cooker takes more time. The reason for this observation is that at high altitude
(a) pressure increases
(b) temperature decreases
(c) pressure decreases
(d) temperature increases
A quantity of gas is collected in a graduated tube over the mercury. The volume of gas at 18°C is 50.0 mL and the level of mercury in the tube is 100 mm above the outside mercury level. The barometer reads 750 torr, Hence, volume at STP is approximately
(a) 22 mL
(b) 40 mL
(c) 20 mL
(d) 44 mL
A gas that follows Boyle’s law, Charles’ law and Avogadro’s law is called an ideal gas. Under what conditions a real gas would behave ideally?
(a) High pressure and low temperature
(b) Low pressure and high temperature
(c) High pressure and high temperature
(d) Low pressure and low temperature
Avogadro’s hypothesis states that
(a) the ideal gas consists of a large number of small particles called molecules
(b) under the same conditions of temperature and pressure equal volumes of gases contain the same number of molecules
(c) volume of a definite quantity of gas at constant pressure is directly proportional to absolute temperature
(d) a given mass of gas at constant pressure is directly proportional to absolute temperature
(e) for a definite mass of gas at constant temperature the volume is inversely proportional to its pressure
The density of air is 0.001293 g/cc at STP. Its vapour density is
The drain cleaner, Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20°C and 1 bar will be released when 0.15 g of aluminium reacts?
(a) 22400 mL
(b) 203 mL
(c) 0.203 mL
For one mole of an ideal gas, increasing the temperature from 10°C to 20°C
(a) increases the average kinetic energy by two times
(b) increases the rms velocity by 42 times
(c) increases the rms velocity by two times
(d) increases both the average kinetic energy and rms velocity, but noj significantly
What will be the molar volume of nitrogen and argon at 273.15 K and 1 atm? . [NCERT Exemplar]
(a) 11.2, 22.4 respectively
(b) 22.4, 22.4 respectively
(c) 11.2,11.2 respectively
(d) 22.4,11.2 respectively
A gas in an open container is heated from 27°C to 127°C. The fraction of the original amount of the gas remaining in the container will be
Dominance of strong repulsive forces among the molecules of the gas (Z = compressibility factor)
(a) depends on Z and indicated by Z = 1
(b) depends on Z and indicated by Z >1
(c) depends on Z and indicated by Z < 1
(d) is independent of Z
Containers Aand 6 have same gases. Pressure, volume and temperature of A are all twice that of 6, then the ratio of number of molecules of A and B are
(a) 1 : 2
(b) 2 : 1
(c) 1 : 4
(d) 4 : 1
At what temperature will the total kinetic energy of 0.30 mole of He be the same as the total kinetic energy of 0.40 mole of Ar at 400 K?
(a) 533 K
(b) 400 K
(c) 346 K
(d) 300 K
The average molecular speed is greatest in which of the following gas samples?
(a) 1.0 mole of 02 at 560 K
(b) 0.50 mole of Neat 500 K
(c) 0.20 mole of C02 at 440 K
(d) 2.0 mole of He at 140 K
Ideal gas equation in terms of kinetic energy per unit volume, E is
Mole fraction of water vapour in the water saturated air is 0.02. If total pressure is 1.2 atm, partial pressure of dry air is
(a) 1.18 atm
(b) 1.22 atm
(c) 1.176 atm
(d) 1.224 atm
Vapour pressure increases with increase in
(a) concentration of solution containing non-volatile solute
(b) temperature up to boiling point
(c) temperature up to triple point
(d) altitude of the concerned place of boiling
Direction (Q. Nos. 37-38) In the following questions more than one of the answer may be correct. Select the correct answer and mark it according to the codes.
(a) 1,2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct
Direction (Q. Nos. 40-45) Each of these questions contains two statements: Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c),
(d) given below
(a) Assertion is true, Reason is true; Reason is a correct explanation for Assertion.
(b) Assertion is true, Reason is true; Reason is not a correct explanation for Assertion.
(c) Assertion is true, Reason is false.
(d) Assertion is false, Reason is true.
Assertion 1/4 of the gas is expelled if air present in an 4 open vessel is heated from 27°C to 127°C.
Reason Rate of diffusion of a gas is inversely proportional to the square root of its molecular mass.
Assertion C02 above 31.1°C and 600 bar pressure is used to remove caffeine from coffee beans.
Reason C02 is gaseous in nature.
Assertion Viscosity of liquid decreases with increasing the temperature.
Reason Evaporation of liquid increases with rise in temperature.
Assertion Meniscus of a liquid disappears at critical temperature.
Reason Density of d liquid and its gaseous phase become equal at the critical temperature.
50 ml of each gas A and gas B takes 150 and 200 s respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gas A will be
The vapour pressure of two liquids P and Q are 80 and 60torr respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be
(d) 72 ton
Two gases A and B having the same volume diffuse through a porous portion in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be
(a) 12.25 u
(b) 6.50 u
(c) 25.00 u
(d) 50.00 u
A gaseous mixture was prepared by taking equal moles of CO and N2. If the total pressure of the mixture was found to be 1 atm, the partial pressure of the nitrogen (N2) in the mixture is
(a) 0.8 atm
(b) 0.9 atm
(c) 1 atm
(d) 0.5 atm
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?
sulphur dioxide at 546 K are taken in two separate containers, then,
(a) kinetic energy of 02 >kinetic energy of S02
(b) kinetic energy of 02 < kinetic energy of S02
(c) kinetic energy of both are equal
(d) None of the above
What will be the partial pressure of He and 02respectively, if 200 mL of He at 0.66 atm and 400 mL of 02 at 0.52 atm pressure are mixed in 400 mL vessel at 20°C?
(a) 0.33 and 0.56 .
(b) 0.33 and 0.52
(c) 0.38 and 0.52
(d) 0.25 and 0.45
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