Gaseous and liquid states Questions and Answers

16 g of oxygen and 3 g of hydrogen are mixed and kept at 760 mm pressure and 0 C The total volume occupied by the mixture will be nearly 1 22 41 2 33 61 3 448 litre 4 44800 ml

3 Consider the following graphical representation of concentration versus time for the equilibrium system PC13 g Cl2 g PCl5 g CONC mol L 0 080 0 060 0 040 0 020 012 3 AH 92 5 kJ I 4 5 6 7 1 8 9 1 10 1 PC13 g Cl g PC1s 11 12 13 14 TIME min a What change was imposed at time 5 minutes 1T b What change was imposed at time 8 minutes 1T c What change was imposed at time 11 minutes 1T d Using the data for the 4 minute mark find the value of Keq at the temperature concerned 2T

following gases Gas ANK X a atm dm6 mol 2 1 30 25 14 1 b 10 2 dm mol 1 3 21 71 05 0 Which gas is expected to have the highest critical temperature

A mixture composed of 0 200 g of hydrogen 0 210 g of nitrogen and 0 510 g of ammonia NH3 is enclosed in a 13 6 L container What are the partial pressures of the three gases at 27 C considered perfect in Pascal Please choose an answer A Hydrogen 18440 Pa Nitrogen 2480 Pa Ammonia 7500 Pa B Hydrogen 37780 Pa Nitrogen 2450 Pa Ammonia 11020 Pa C Hydrogen 18340 Pa Nitrogen 1380 Pa Ammonia 5500 Pa D Hydrogen 18340 Pa Nitrogen 1480 Pa Ammonia 6500 Pa E Hydrogen 36680 Pa Nitrogen 2750 Pa

An open beaker of water in equilibrium with water vapour is in a sealed container When few grams of glucose are added to the beaker of water the rate at which water molecules JEE Main 2020 2 September Shift 1 a leaves the solution decreases b leaves the solution increases c leaves the vapour increases d leaves the vapour decreases c

and temperature is taken in kelvin V litre 16 00 im B 500 V T constant 1000 K T K 68 JEE Main Advanced Leve is found that the magnitude of work done by as in complete process i e during entire cycle R where R is universal gas constant The ve

6 The weight of silver at wt 108 displaced by a quantity of electricity which displaces 5600 mL of O2 at STP will be AIPMT 2014 a 5 4 g c 54 0 g b 10 8 g d 108 0 g

the following will be incorrect Question Type Single Correct Type 1 Effective size of molecule will increase 2 Compressible volume will decrease 3 Incompressible volume will increase

Questions given below are based on the following isotherm Assume perfect gas behaviour in the following isotherm Take C R T 313K Pressure P atm A 0 39 mol C 0 78 mol 20 1 B C D 0 50 Volume V L 10 13 Number of moles of gas in this system at the start is A 2 B 0 17 mol D 0 34 mol

How can you tell whether a compound has dipole dipole forces Polar compounds will have higher melting and boiling points than non polar compounds of similar molar mass Pola compounds will have lower melting and boiling points than non polar compounds of similar molar mass Not enough information

23 2 Two gases H and O effuse from two different containers having same pressure and temperature If the ratio of area of cross section of hole is 1 2 then the ratio of rate of effusion will be 1 8 1 2 2 1 3 1 4 4 4 1

6 Given van der Waals constant for NH3 H O and CO are respectively 4 17 0 244 1 36 and 3 59 which one of the following gases is most easily liquefied a NH3 c 0 b H d CO NEET 2018

H g 2H 9 2 1 837 2 1165 3 815 4 865 At constant volume 4 mol of an ideal gas when heated from 300K to 500K changes its internal energy 5000J The molar heat capacity at constant volume is 2 6 25 3 6 75 4 6 75 1 3 125 The following structure is known as

0 782 mol sample of neon gas at a temperature of 9 00 C is found to occupy a volume of 21 1 liters The pressure of this gas sample is Hg

molal solution of Hg NO3 freezes at not 0 558 C The cryoscopic constant for water is 1 86 KKg mol then what will be the percentage ionisation of salt 2 50 4 100 A3 1 33 33 3 75

A 25 L sealed flask contains three different gases He Ar and Ne The gas mixture has a total pressure of 2 0 atm at 25 C He 4 0 Ar 40 0 Ne 20 0 Given R 0 080 atm L mol K Give all your answers to two significant figures Gas Mole fraction He Ar Ne 0 50 0 25 0 25 Partial pressure atm Mass g

The wave function of atomic orbital of H like species is given by Y2s 1 4 2 Z312 Z 2 2 zr e 2 The radius for nodal surface of He ion in A is

The rate of diffusion of a gas having molecular weight just double of nitrogen gas is 56 ml per sec the rate of diffusion of nitrogen gas will be 2 112 ml sec 4 90 ml sec 1 79 19 ml sec 3 56 ml sec

24 0 24 g of a volatile substance upon vapourisation gives 45 ml vapour at NTP What will be the vapour density of the substance or 1 95 93 3 95 39 2 59 73 4 5 993

Problem 33 A student forgot to add the reaction mixture to the round bottome open flask at 27 C and put it on the flame After a lapse of time he realized his mistake using a pyrometer he found the temperature o the flask was 477 C What fraction of air would have been expelled out

For a Vanderwaal real gas Z 1 00054 at 273 15 K and 101 325 kPa If the Boyle s temperature of the gas in 107 K then the value of Vanderwaal constant b is A 0 0121 Lmol B C D 1 121 Lmol 0 0482 Lmol 4 82 Imol

Match gases under specified conditions listed in Column l with their properties laws in Column II Indicate your answer by darkening the appropriate bubsbles of the 4 x 4 matrix given in the ORS Column l A hydrogen gas P 200 atm T 273K B hydrogen gas P 0 T 273K C CO P 1 atm T 273K D real gas with very large molar volume Column II p compressibility factor 1 attractive forces are dominant PV nRT q s P V nb nRT

Three gases A B and C are at the same temperature If their most probable speeds 1 1 are inthe ratio of 1 then their molar masses will be in the ratio 3 5 A 1 3 5 B 5 3 1 C 1 D R 1 3 5 12

Nitrous oxide N O is a colourless and odorless substance that is also known as laughing gas a What is the density of laughing gas at a temperature of 35 C and a pressure of 95 0 kPa 2 marks

51 180 1 25 atm A gaseous mixture contains 220 g of carbon dioxide and 280 g of nitrogen gas If the partial pressure of nitrogen gas in the mixture is 1 5 atm then the partial pressure of carbon dioxide gas in the mixture will be 0 75 atm 0 50 atm Mark for Review 3 atm 02 58 hr min

4 A 1 85 g sample of an arsenic containing pesticide was chemically converted to As 03 atomic mass of As 74 9 and titrated with Pb to form Pb3 AsO4 2 If 20 mL of 0 1 M Pb is required to reach the equivalence point t percentage of arsenic in the pesticide sample is closest to a 8 1 b 2 3 c 5 4 nail c

14 2 marks 2 0 L of pure water is placed in a sealed room of volume 4 33 104 L Will the pure water evaporate in the room at 25 C If so how much of it will evaporate The density of water is 0 997 g ml and its vapour pressure is 23 8 torr at 25 C Assume that there is no water vapour in the sealed room initially R 0 0821 L atmK mol 1 atm 760 torr 760 mmHg

While resting the average human male use 0 2 dm of O per hour at 1 atm 300 K for eac kg of body mass Assume that all this O is used to produce energy by oxidising glucose in th body What is the mass of glucose required per hour by a resting male having mass 60 kg L atm What volume at 1 atm 300 K of CO would be produced R 0 08 mol K

How much energy is released when 8 1 g of water is heated from 12 C to 18 C 203 3 J 203 3 kJ 2 033 kJ No energy is released because this is an endothermic reaction

Osmotic pressure depends on all but which of the following atmospheric pressure the molarity of the solution temperature the ratio of moles of solute to solution volume none of these

7 Calculate the number of molecules of gas produced 2 Calculate the molar volume volume of 1 mol of gas produced under lab conditions 2

3 Determine the theoretical volume of gas that should be produced in the lab conditions based on your limiting reagent 3

CH4 Express your answer using four significant figures mass C Submit Part B V A O Request Answer C5 H12 Express your answer using four significant figures

Question 10 A container is filled with 27 6 L of oxygen gas O at STP Approximately what mass of oxygen would there be in the container Report your answer to the tenths place Answer grams of O2 Loll

A helium filled weather balloon has a volume of 796 L at 15 9 C and 759 mmHg It is released and rises to an altitude of 7 80 km where the pressure is 331 mmHg and the temperature is 30 1 C The volume of the balloon at this altitude is L

14 How much space in L does 113 moles of O take up

Write net ionic equations for gas forming reactions Write a net ionic equation for the reaction that occurs when excess aqueous nitric acid s combined with solid iron II carbonate Be sure to specify states such as aq or s If a box is not needed leave it blank

3 A weather balloon at ground level contains 55 0 L of helium at 25 0 C and a pressure of 1 11 atm Calculate the volume of the balloon after it rises into the upper atmosphere where the temperature is 34 0 C and the outside pressure is 32 0 kPa 4 marks

For a given ideal gas at constant temperature Pressure is always constant The product of pressure and volume always remains constant O Volume is always constant The difference of pressure and volume always remain constant

The vapor pressure of a solution containing 7 52 g of a nonvolatile non electrolyte solute C21 H420 in 71 18 g of solvent A MW 78 g mol is 684 torr at 20 C What is the vapor pressure of pure solvent A 20 C Report your answer to the nearest whole number Your Answer

The osmotic pressure of a 3 30 mL solution containing 0 181 g of protein dissolved in water is determined to be 17 30 torr at 22 C What is the molar mass of the protein Report your answer to the nearest whole number hint proteins have very large molar masses Your Answer 1

An element having which of the following electronic configurations would have the greatest ionization energy A He 2s 2p B He 2s 2p5 C Ne 3s 3p5 OD Ne 3s23p3

Determine how the solubility of a solid in a liquid is affected i e increases decreases or stays the same by the following change Increasing Pressure O Increases O Stays the same Decreases

Give an example of a solid gas suspension

Question 10 A solution is made using 65 1 g of hexane and 60 0 g of octane What is the mole fraction of the hexane in the soluti

5 The FHA VA Loan Addendum is used if a The seller needs to inform buyers of multiple offers b The buyer is going to apply for an FHA or VA loan c The buyer wants an inspection or assessment d The renter wants to purchase the property

At a particular temperature K 2CO g 2CO g O2 g If 4 0 moles of CO2 is initially placed into a 5 0 L vessel calculate the equilibrium concentrations of all species CO Co 0 M M M for the reaction

You perform by obtaining an aqueous solvent and an ionic compound your instructor confirms has a van t Hoff factor of 2 Water has a Kf 1 86 C m You perform the lab with the following data Fill in the chart with the correct number of significant figures Mass of Solvent 14 55 Mass of Unknown 0 0984 Total Mass of Unknown added N A AT 0 693 Molality of the solution Molar Mass of Solute Average Molar Mass of Solute Submit Question g mol Trial 1 m g mol 14 55 N A 0 1535 1 95 Trial 2 m g mol

The reaction N O4 g 2NO2 8 has a Kp 0 140 at 25 C In a reaction vessel containing the gases in equilibrium at that temperature the partial pressure of N O4 was 0 265 atm a What was the partial pressure of NO in the reaction mixture pressure of NO i atm b What was the total pressure of the mixture of gases

At a certain temperature Kc 0 500 for the reaction SO3 g NO g NO2 g SO g If 0 100 mol SO3 and 0 200 mol NO are placed in a 2 00 L container and allowed to come to equilibrium what will the NO2 and SO2 concentrations be NO i M M