A colloidal solution of gold nanoparticles is prepared by reduction of . Which of the following methods is MOST EFFECTIVE for purifying this solution from excess reactants and small ionic byproducts?
Filtration
Centrifugation
Dialysis
Evaporation
Related Questions
If we dissolve 20g of NaOH in 200ml of water, what will be the mass percentage of NaOH in the solution (assuming the density of water is 1g/ml)?
9.09%
10%
11.11%
20%
The least count of burette used normally in laboratory is :
0.1 mL
0.01 mL
0.2 mL
0.02 mL
How many moles of solute are present in a 2 molal solution containing 250g of solvent?
0.25 moles
0.5 moles
1 mole
2 moles
A solution is prepared by dissolving 10 g of glucose in 190 g of water. What is the mass percentage of glucose in the solution?
5%
10%
2%
95%
The speed of sound in air is dependent on temperature. Which of the following correctly describes this relationship?
Speed of sound decreases with increasing temperature
Speed of sound increases with increasing temperature
Speed of sound is independent of temperature
Speed of sound initially increases then decreases with increasing temperature
Which of the following methods is most suitable for separating a mixture of iodine and potassium chloride?
Sublimation
Distillation
Chromatography
Solvent Extraction
Which of the following methods is NOT suitable for concentrating a protein solution?
Simple distillation
Ultrafiltration
Lyophilization
Dialysis against a concentrated polymer solution
A 1 molal aqueous solution contains 0.5 moles of solute. What is the mass of the solvent (water) in kilograms?
0.5 kg
1 kg
2 kg
1.5 kg
A binary solution of liquids A and B shows positive deviation from Raoult's law. Which of the following statements is TRUE?
The intermolecular forces between A and B are weaker than those between A-A and B-B.
The intermolecular forces between A and B are stronger than those between A-A and B-B.
The solution exhibits a negative deviation from Raoult's law.
The total vapor pressure of the solution is less than the sum of the vapor pressures of the pure components.
