States of Matter
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If the potential energy between two molecules in given by U = A/r¹² - B/r? then at equilibrium, separation between molecules, and the potential energy are:
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If the potential energy between two molecules in given by U = A/r¹² - B/r? then at equilibrium, separation between molecules, and the potential energy are:
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F = -dU/dr = - [-12A/r¹³ + 6B/r? ]
F=0 ⇒ r= (2A/B)¹/?
U (at r= (2B/A)¹/? ) = -A²/4B
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In a solid AB, A atoms are in ccp arrangement and B atoms occupy all octahedral sites. If two atoms from the opposite face are removed, then the resultant stoichiometry of the compound is AxBy. The value of x is ___________(nearest integer)
In a solid AB, A atoms are in ccp arrangement and B atoms occupy all octahedral sites. If two atoms from the opposite face are removed, then the resultant stoichiometry of the compound is AxBy. The value of x is ___________(nearest integer)
After removal A = 4
After removal B = 4 – 1 = 4 (only two atoms are removed)
Final formula of the compound = A3B4
Upvote Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46 gL-1 at 257°C and 100 mm Hg. The molar mass of geraniol is___________ g mol-1 (Nearest Integer).
[Given R = 0.082 L atm K-1 mol-1]
Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46 gL-1 at 257°C and 100 mm Hg. The molar mass of geraniol is___________ g mol-1 (Nearest Integer).
[Given R = 0.082 L atm K-1 mol-1]
Assuming ideal behaviour,
d = 0.46gm/L
Upvote The wavelength of an electron and a neutron will become equal when the velocity of the electron is x times the velocity of neutron. The value of x is ___________. (Nearest Integer)
(Mass of electron is 9.1 × 10-31kg and mass of neutron is 1.6 × 10-27kg)
The wavelength of an electron and a neutron will become equal when the velocity of the electron is x times the velocity of neutron. The value of x is ___________. (Nearest Integer)
(Mass of electron is 9.1 × 10-31kg and mass of neutron is 1.6 × 10-27kg)
A 10g mixture of hydrogen and helium is contained in a vessel of capacity 0.0125 m3 at 6 bar ansd C. The mass of helium in the mixture is__________g. (nearest integer)
A 10g mixture of hydrogen and helium is contained in a vessel of capacity 0.0125 m3 at 6 bar ansd C. The mass of helium in the mixture is__________g. (nearest integer)
PV = nmixRT
Let moles of He is x
Moles of H2 = 3 – x
4x + 2 (3 – x) = 10
x = 2 mol
Mass of He = 8 gm
Upvote The minimum uncertainty in the speed of an electron in an one dimensional region of length 2a0 (Where a0 = Bohr radius 52.9 pm) is__________ km s-1.
(Given: Mass of electron = 9.1 × 10-31 kg, Planck’s constant h = 6.63 × 10-34 Js)
The minimum uncertainty in the speed of an electron in an one dimensional region of length 2a0 (Where a0 = Bohr radius 52.9 pm) is__________ km s-1.
(Given: Mass of electron = 9.1 × 10-31 kg, Planck’s constant h = 6.63 × 10-34 Js)
According to Heisenberg’s uncertainly principle
= 548273 ms-1
Upvote Which amongst the given plots is the correct plot for pressure (p) vs density (d) for an ideal gas?
Which amongst the given plots is the correct plot for pressure (p) vs density (d) for an ideal gas?
For ideal gas using ;
PM = dRT
Comparing with y = mx + C
Slope, m =
Slope
So; higher the slope higher the T
Hence, T3 > T2 > T1
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5.42. State and explain Dalton’s law of partial pressures. Can we apply Dalton’s law of partial pressures to a mixture of carbon monoxide and oxygen?
5.42. State and explain Dalton’s law of partial pressures. Can we apply Dalton’s law of partial pressures to a mixture of carbon monoxide and oxygen?
5.42. Dalton's law of partial pressure: When two or more non-reacting gases are enclosed in a vessel, the total pressure of the gaseous mixture is equal to the sum of the partial pressures that each gas will exert when enclosed separately in the same vessel at constant temperature.
P= P1 + P2 +
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