Paper Chromatography Notes Questions with Answers PDF Download - 75

In order to separate colors, dyes and amino acids, the useful method will be

1. crystallization
2. centrifugation
3. filtration
4. chromatography

Factors affecting the speed of chemical reactions does not include

1. pressure on reactants
2. particle size of reactants
3. concentration of reactants
4. volume of reactants

Adsorption refers to the

1. bounding of a substance to the surface of another substance
2. diffusion of one substance to the bulk of other substances completely
3. boiling of liquid at the surface
4. none of above

What is true about Spectator ions?

1. they take active part in forming new products
2. they remain chemically unchanged in an ionic equation
3. they act as catalysts
4. they form suspensions in the liquid

Al⁺³ indicates that

1. it needs -3 valency to become stable
2. it has high negative charge
3. Aluminum is found in Group-II
4. none of above