Chemistry Solutions

The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following process can explain this?

The INCORRECT statement is:

A graph of vapour pressure and temperature for three different liquids $$ , and $$ is shown below:

The following inferences are made :

$\mathrm{X}$ has higher intermolecular interactions compared to $Y$

$X$ has lower intermolecular interactions compared to   $Y$ $$

$Z$ has lower intermolecular interactions compared to $Y$ $$

The correct inference (s) is / are :

The flocculation value of $\mathrm{H}\mathrm{C}\mathrm{l}$ for arsenic sulphide sol is $30\mathrm{m}\mathrm{m}\mathrm{o}\mathrm{l}{\mathrm{L}}^{-1}$ . If ${\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4$ is used for the flocculation of arsenic sulphide, the amount, in grams of ${\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4$ in $250\mathrm{m}\mathrm{L}$ required for the above purpose is (Molecular mass of ${\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4=98\mathrm{g}/\mathrm{m}\mathrm{o}\mathrm{l}$  )                 

Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non-volatile solute are together sealed in a container. Over time

At ${}^{}$ ${35}^{?}\mathrm{C}$ , the vapour pressure of ${\mathrm{C}\mathrm{S}}_2$ ${}_{}$ is $$ $512\mathrm{m}\mathrm{m}$ of $\mathrm{H}\mathrm{g}$ $$ and that of acetone is $344\mathrm{m}\mathrm{m}$ $$ of $\mathrm{H}\mathrm{g}$ $$ . A solution of ${\mathrm{C}\mathrm{S}}_2$ ${}_{}$ in acetone has a total vapour pressure of $600\mathrm{m}\mathrm{m}$ $$ of $\mathrm{H}\mathrm{g}$ $$ . The false statement among the following is

CO? gas is bubbled through water during a soft drink manufacturing process at 298 K. If CO? exerts a partial pressure of 0.835 bar then x m mol of CO? would dissolve in 0.9 L of water. The value of x is ______ (Nearest integer). (Henry's law constant for CO? at 298 K is 1.67*10³ bar)

1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 * 10⁻³ bar. The molar mass of the biopolymer is _______ * 10⁴ g mol⁻¹. (Round off to the Nearest integer) [Use: R = 0.083 L bar mol⁻¹ K⁻¹]

When 3.00 g of substance 'X" is dissolved in 100 g of CCl₄, it raises the boiling point by 0.60K. The molar mass of the substance 'X" is __________g mol⁻¹. (nearest integer)
[Given Kb for CCl₄ is 5.0 K kg mol⁻¹]