states of matter

Question 1

attractive intermolecular forces are called

Answer 1

vander walls forces

Question 2

who explained the deviation of real gases from ideal behaviour

Answer 2

johannes wander walls

Question 3

enrgy of hydrogen bond varies between

Answer 3

10-100kjmol-1

Question 4

strength of hydrogen bond determined by

Answer 4

coulumbic interaction bet lon paier of electrons of the electronegative atom of one molecule and theh hydrogen atom of other molecule

Question 5

gases exert pressure equally in all directions true or false

Answer 5

true

Question 6

kelvin temp also caled as

Answer 6

absolute temp scale

Question 7

slopes of lines obtained at diff pressure are different but at zero volume all the lines meet the temperature axis at

Answer 7

-273.15 degree celcious

Question 8

at stp coditions (atm,degree c) value of R

Answer 8

.083

Question 9

ideal gas is a relation bet –variables

Answer 9

4

Question 10

ideal gas also called

Answer 10

equation of state

Question 11

pressure exerted by a saturated watervapour is called

Answer 11

aquous tension

Question 12

ratio of rms speed uav ump

Answer 12

1.224;1.128;1

Question 13

as pressure increases

Answer 13

molecules start interacting together
pressure exerted by gases on walls decreases

Question 14

most neg deviation of ideal gas (as per ncert graph co2 or ch4

Answer 14

co2

Question 15

real gases show ideal behaviour at

Answer 15

low pressur and high temperature

Question 16

conditns Z>1

Answer 16

at high presuure and hard to cmpress

Question 17

Z value order

Answer 17

n2>h2>02>ch4>c02

Question 18

in liquifaction of gases curve
curve represent

Answer 18

compressibility of liq

Question 19

steep line in liquifaction of gases curve

Answer 19

isotherm of liquid

Question 20

normal boilimg point of water

Answer 20

100 deg cel

Question 21

sts boiling point of water

Answer 21

99.6 deg cel

Question 22

viscous force is directly prp to

Answer 22

area of contacta and vel gradient

Question 23

unit of viscosity in cgs

Answer 23

poise
1 poise =1gcm-1 s -1

Question 24

si unit of viscosity

Answer 24

1Ns /M2 =Pa s(kgm-1s-1)

Question 25

value of boltsmann constant

Answer 25

1.38*10 -23

Question 26

unit of vanderwaal constant a

Answer 26

Atm×litre2mol−2

Question 27

unit of vanderwaal constant b

Answer 27

`L*mol^(-1)

Question 28

order of strength of forces

Answer 28

covalent bond>hydrogen bond >dipole dipole >dipole induced >london force>wanderwalls f

Question 29

liquifcation of gases done at

Answer 29

high pressure and low temp

Question 30

ideal gas have ———pressure

Answer 30

high pressure