STOICHIOMETRY QUIZ

What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?

AB₂

A₂B

A₂B₃

AB₃

TRUE ANSWER : ?
YOUR ANSWER : ?

NaOH contains __________ percent oxygen.

16

10

1

40

TRUE ANSWER : ?
YOUR ANSWER : ?

Equal masses of CH₄ and H₂ are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is

8/9

1/9

5/9

1/2

TRUE ANSWER : ?
YOUR ANSWER : ?

Size range of the colloidals particles is

500 - 1000 microns

50 - 200 microns

10 - 50 Angstrom

5 - 200 milli-microns

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is followed by an ideal solution ?

Trouton's rule

Amgat's law

Raoult's law

Boyle's law

TRUE ANSWER : ?
YOUR ANSWER : ?

Ideal solution is formed, when its components have zero

Heat of mixing

Volume change

Neither A nor B

Both A & B

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YOUR ANSWER : ?

Colligative properties of a dilute solution are those, which depend entirely upon the

Number of solute molecules contained in a given volume of the solvent

Constitution of the solute

None of these

Chemical composition of the solute

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?

Nature of solute

Temperature

Nature of solvent

Pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

Addition of a non-volatile solute to a pure solvent

Both B and C

Decreases its freezing point

Increases its boiling point

Increases its freezing point

TRUE ANSWER : ?
YOUR ANSWER : ?

The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.

Remains unchanged

Either A or B; depends on the liquid

Increases

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

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