Band Fm 3 For which of the following molecule significant u no 0? (JEEM 201 2. A gas in due to that ofc-om lowme species po CN In the

For which of the following hydrogen-like species, the wavelength of radiation emitted due to electron shifts from n = 2 to n= 1, has a maximum value?H H e + L i 2 + B e 3 +

According to collision theory, rate of the reaction effects by which of the following: 1. reacting molecules must react in the presence of catalyst. 2. molecules must have energy equal to or high E_a 3. molecules must have effective collisions due to proper orientation. 4. none of these.

On the basis of the postulates of kinetic theory of gases, it is possible to derive the mathematical expression, commonly known as kinetic gas equation. PV = 1/3 m n u^3? where, P= Pressure of the gas, V a volume of the gas, m=Mass of a molecule, n = Number of molecules present in the given amount of a gas and u = root mean square speed For one mole of gas, PV = RT and n=N_A 1/3 m N_a u^2 = RT or 2/3 .1/2m N_A u^2 = N_A [1/2mN_Au^2 = KE "per mole"] ,2/3K.E. = RT implies K.E. 3/2RT Average kinetic energy per mol does not depend on the nature of the gas but depends only on temperature. This, when two gases are mixed at the same temperature, there will be no rise or decrease in temperature unless both react chemically. Average kinetic energy per molecule = ("Average K.E. per mole")/N = 3/2(RT)/(N) implies 3/2kT where k is the Boltzmann constant Which of the following expressions correctly represents the relationship between the average molar kinetic energies of CO and N_2 molecules at the same temperature ?

Which of the following will be the most effective in coagulating gold sol? K_4Fe(CN)_6,MgCl_2 or Na_3PO_4

Consider a hypothetical gas with molecules that can move along only a single axis. The following table gives four situations. The velocities in meter per second of such a gas having four molecules are given below. The plus and minus sign refer to the direction of the velocity along the axis. {:(ul("Situation Velocities"),,,,),("a -2 +3 -4 +5",,,,),(-------------,,,,),("b +1 -3 +4 -6",,,,),(-------------,,,,),("c +2 +3 +4 +5",,,,),(-------------,,,,),("d +3 +3 -4 -5",,,,),(-------------,,,,):} In which situation root-mean-square speed of the molecules is greatest