The simplest way to check whether a system is colloidal is by

• electrodialysis

• finding out particle size

• Tyndall effect

• Brownian movement

An example for a strong electrolyte is

• urea

• ammonium hydroxide

• sugar

• sodium acetate

Sodium chloride is an ionic compound where as hydrogen chloride gas is mainly covalent because

• electronegativity difference in the case of hydrogen is less than 2.1

• hydrogen chloride is a gas

• hydrogen is a non-metal

• sodium is reactive

Iron loses magnetic property at

• melting point

• 1000 K

• Curie point

• boiling point

An example for a double salt is

• potassium ferricyanide

• cobalt hexamine chloride

• cuprous sulphate

• Mohr's salt

The set of compounds in which the reactivity of halogen atom in the ascending order is

• vinyl chloride, chloroethane, chlorobenzene

• vinyl chloride, chlorobenzene, chloroethane

• chloroethane, chlorobenzene, vinyl chloride

• chlorobenzene, vinyl chloride, chloroethane

In the case of auto catalysis

• product catalysis

• solvent catalysis

• reactant catalysis

• heat produced in the reaction catalysis

Order of reaction is decided by

• molecularity

• pressure

• temperature

• mechanism of reaction as well as relative concentration of reactants

39.

Half-life of a reaction is found to be inversely proportional to the cube of initial concentration. The order of reaction is

• 5

• 2

• 4

• 3

Which among the following statements is false?

• The adsorption may be monolayered or multilayered

• Particle size of adsorbent will not affect the amount of adsorption

• Increase of pressure increases amount of adsorption

• Increase of temperature may decrease the amount of adsorption