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JEE Main || Physical Chemistry || Super Quiz 7
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Question 1
Uncertainty in position of a particle of 25 g in space is 10-5m. Hence, uncertainty in velocity (ms-1) is (Planck's constant h =6.6 x 10-34 Js):
Question 2
The electrons identified by quantum numbers n and l :
(a) n = 4, l = 1 (b) n = 4, l = 0 (c) n = 3, l = 2 (d) n = 3, l = 1
Can be placed in order of increasing energy as :
(a) n = 4, l = 1 (b) n = 4, l = 0 (c) n = 3, l = 2 (d) n = 3, l = 1
Can be placed in order of increasing energy as :
Question 3
Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 103 ms–1
(Mass of proton = 1.67 × 10–27 kg and h = 6.63 × 10–34Js):
(Mass of proton = 1.67 × 10–27 kg and h = 6.63 × 10–34Js):
Question 4
Consider the following nuclear reactions
The number of neutrons in the element L is
The number of neutrons in the element L is
Question 5
At temperature T, the average kinetic energy of any particle is 
. The de Broglie wavelength follows the order:
. The de Broglie wavelength follows the order: Question 6
The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 20 m/s is approximately:
Question 7
In conversion of lime-stone to lime, CaCO3(s) → CaO(s) + CO2(g) the value of ΔH ° and ΔS ° are +179.1 kJ mol–1 and 160.2 J/K respectively at 298 K and 1 bar. Assuming that ΔH ° and ΔS ° do not change with temperature, temperature above which conversion of limestone to lime will be spontaneous is
Question 8
Conductivity (Seimen S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel, then constant of proportionality is expressed in:
Question 9
The correct relationship between free energy change on a reaction and the corresponding equilibrium constant Kc is
Question 10
Which one of the following statements is not true?
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Sep 18JEE & BITSAT
