Gaseous state

Question 1

Vapor Density =

Answer 1

Molar Mass / 2

Question 2

Boyles Law ?

Answer 2

P₁V₁= P₂V₂

Question 3

Charles Law ?

Answer 3

V1/T1 = V2/T2

Question 4

Gay Lussac’s Law

Answer 4

P1/T1 =P2/T2

Question 5

Equation Of the State

Answer 5

P1 V1/T1 = P2 V2/T2

Question 6

Ideal Gas Eqn

Answer 6

PV=NRT

Question 7

Avagadro’s Hypotheses

Answer 7

V1/N1 = V2/N2

Question 8

Ideal gas Eqn in terms of density
( for single Gas )

Answer 8

d = PM/RT

Question 9

Ideal gas Eqn in terms of density
( for mixture of gases )

Answer 9

Dₐᵥ𝓰 = PMₐᵥ𝓰 / RT

Question 10

Pressure of liquid due to height

Answer 10

P= hdg ( d-density of liquid
h-height of the liquid
g=9.8 )

Question 11

What is barometer used for

Answer 11

to measure atmospheric preasure

Question 12

conversion of height of any liquid into height of (HG liquid ) for same preasure

Answer 12

Hₕ𝓰 = Hₗ * dₗ / 13.6

Question 13

determination of length if trapped air or gas in a liquid in a tube placed horizontally

Answer 13

application of boyles law
P₁V₁= P₂V₂

Question 14

determination of length if trapped air or gas in a liquid in a tube placed vertically open end

Answer 14

P₁L₁= P₂L₂

Question 15

What is manometer used for ?

Answer 15

used to measure preasure of a gas system

Question 16

Dalton’s law of partial pressures

Answer 16

Pₜ = ( Pa + Pb + Pc………)

pa- partial pressure of gas[a]

Question 17

Partial Preasure[a] =
( gaseous state)

Answer 17

Mole fraction[x] * pressure[total]

Question 18

partial pressure gas[a]
__________________________
partial pressure gas [ b]

Answer 18

= Mole Fr. [a] = Wt. [a] /M.mass
_____________ _______________
Mole Fr. [ b ] wt. [b]/ M.Mass

Question 19

mole% of any gas in mixture = ?

Answer 19

N[a] 100 = P.Preasure[a]100
____________ __________________
N[a] + N[b] total pressure

Question 20

what is vapor pressure

Answer 20

pressure exerted by vapor above the liquid surface when rate of evaporation is exactly equal to the rate of condensation ( or at eqm)

Question 21

% relative humidity =

Answer 21

P.Pressur of water
__________________________ *100
Vapour pressure of water

Question 22

graham law of diffusion

Answer 22

rate of diffusion ∝ P.par.
____________
√ temp.M.Mass

Question 23

R[1]
_____ R=rates of diffusion
R[2]

at constant temperature and Pressure

Answer 23

√ M.mass[2] Density[1]
_____________ = √ _______________
M.mass[1] Density[2]

Question 24

Determine rate of diffusion

Answer 24

R= Vol. diffused / time taken

R= distance / time taken

R= Mole of gas diffused/time taken

Question 25

R[1]
_____ R=rates pf diffusion
R[2]

at constant volume and temperature

Answer 25

R= K*P
____
√(M.Mass)

Question 26

Instantaneous rate of diffusion

Answer 26

P[2] / P [1] = e^( -kt /√ M.mass )

Question 27

N[1]^x
______ =
N[2]^x

ratio of moles of gas a and b after xth stage diffusion

Answer 27

N[1] M[2] ^ x/2
_____ _____
N[2] M[1] ^ x/2

Question 28

payload capacity of balloon

Answer 28

Wt.[payload] + wt.[gas] + Wt.[balloon material]
≤ Density{air] * Vol[Balloon}

Question 29

Variation of pressure with altitude = ?

Answer 29

p/ pₒ = e^ ( -mgh /RT )

Question 30

Kinetic gas equation

Answer 30

PV= 1/3 M[one molecule] *V²ᵣₘₛ

Question 31

Vᵣₘₛ= ?
( root mean square velocity )

Answer 31

( V₁ + V₂ + V₃ …….Vₙ / n ) ^ 1/2

Question 32

K.E/mole of a gas Sample=

Answer 32

3/2 *RT=1/2 m Nₐ V²ᵣₘₛ

mass of gas in KG/mol

Question 32

K.E/molecule =

Answer 32

3/2 R/Nₐ *T = 3/2 KT

Question 32

Vᵣₘₛ =

in terms of R,M&T

Answer 32

√ (3RT / M)

Question 33

Maxwell distribution of molecular speed

Answer 33

d Nu =4πv² (n/2πRT)³/² exp[−mu²/2RT]*u² du

Question 34

Uₘₚ

Answer 34

√ ( 2RT/M )

Question 35

Uₘₚ : Uₐᵥ𝓰 : Uᵣₘₛ

Answer 35

1: √ ( 4/π) : √(3)

Question 36

collision frequency ( z₁₁ ) =

Answer 36

πσ² vₐᵥ𝓰 ( N* )²
______________
√(2)

N*= total no. of molecules per unit volume
σ = colision diameter