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The Henry's law constant for the solubility of $N_2$ gas in water at $298 \text{ K}$ is $1.0 \times 10^5 \text{ atm}$. The mole fraction of $N_2$ in air is $0.8$. The number of moles of $N_2$ formed from air dissolved in $10 \text{ moles}$ of water at $298 \text{ K}$ and $5 \text{ atm}$ pressure is:
$K_H$ values for some gases at the same temperature 'T' are given: Gas : $K_H$/k bar Ar : 40.3 $CO_2$ : 1.67 HCHO : $1.83 \times 10^{-5}$ $CH_4$ : 0.413 $K_H$ is Henry's Law constant in water. The order of their solubility in water is :
The Henry's law constant $K_H$ values of three gases (A, B, C) in water are 145, $2 \times 10^{-5}$, and 35 kbar, respectively. Determine the order of solubility of these gases in water from highest to lowest:
The plot of osmotic pressure ($\pi$) vs concentration ($\text{mol L}^{-1}$) for a solution gives a straight line with slope $25.73 \text{ L bar mol}^{-1}$. The temperature at which osmotic pressure measurement is done is: (Use $R=0.083 \text{ L bar mol}^{-1} \text{ K}^{-1}$)
An aqueous solution of $6.3 \text{ g}$ oxalic acid dihydrate is made up to $250 \text{ mL}$. The volume of $0.1 \text{ N NaOH}$ required to completely neutralize $10 \text{ mL}$ of this solution is
Camphor is often used in molecular mass determination because:
200 mL of an aqueous solution contains 1.26 g of protein. The osmotic pressure of this solution at 300 K is found to be 2.57 × 10⁻³ bar. The molar mass of protein will be: (Use: R = 0.083 L bar mol⁻¹ K⁻¹)
The addition of water vapour does not change the density of:
In which case change in entropy is negative?
Identify the correct order of solubility in aqueous medium:
The formation of an ideal solution from components A and B indicates:
Maximum oxidation state is shown by:
Which of the following statements is false?
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? (At. No Cr= 24, Mn= 25, Fe=26, Co= 27)
Which of the following pairs has the same size?
The incorrect statement regarding the lanthanons is:
Name the gas that can readily decolourise acidified $\text{KMnO}_4$ solution.
The reason for lanthanoid contraction is:
The correct electronic configuration of Gadolinium (Atomic number = 64) is:
Which of the following species is colourless?