NEET Chemistry Some Basic Concepts in Chemistry Concentration Methods MCQs

A solution is prepared by dissolving 2.5g of a non-volatile solute in 100g of water. The vapor pressure of the solution is found to be 22.87 Torr at $25^\circ C$. If the vapor pressure of pure water is 23.76 Torr at the same temperature, what is the molar mass of the solute (in g/mol)?

Which of the following methods is NOT suitable for concentrating a protein solution?

A colloidal solution of gold nanoparticles is prepared by reduction of $HAuCl_4$. Which of the following methods is MOST EFFECTIVE for purifying this solution from excess reactants and small ionic byproducts?

A metal M forms a volatile carbonyl complex $M(CO)_x$. 0.525g of this complex is heated in a closed vessel of volume 250 mL at $50^\circ C$. The pressure inside the vessel after complete decomposition of the complex is 746 Torr. If the gas constant R is 0.0821 L atm $K^{-1} mol^{-1}$, what is the value of x in the formula $M(CO)_x$? (Assume the metal M does not contribute significantly to the pressure)

Which of the following is used as a depressant in the froth flotation process for separating ZnS and PbS?

If 20 g of solute is dissolved in 80 g of solvent, what is the mass percentage of the solute?

A solution is prepared by dissolving 0.5 moles of solute in 250 g of solvent. What is the molality of the solution?

What is the molarity of a solution containing 1 mole of solute in 500 mL of solution?

Which of the following methods is most suitable for separating a mixture of iodine and potassium chloride?

A mixture of sand, salt, and iron filings can be separated using a combination of methods. Which sequence is the most efficient?