The chemical of the air bag reaction is called sodium azide, or NaN₃. when the accident happen the reaction gives large volume of gas.

what is the science which is interested in

studying this kind of reactions

• Biochemistry.

• Physical chemistry.

• Environmental chemistry.

• Analytical chemistry

during distillation of table salt solution, where water is evaporated from salt and then, water is collected at

.............

• Glass beaker

• Round-bottom flask

• Conical flask

• Volumetric flask

The correct estimation of the reading of the volume

of the liquid in the graduated cylinder illustrated in the opposite figure requires the eye to be in the position....

• A

• B

• C

• D

What is the volume of the liquid in the graduated cylinder

which is illustrated in the opposite figure ? .............. .

• 5.6 mL

• 5.7 mL

• 5.8 mL

• 5 .9 mL

Which of the following tools can be used to identify the volume of an irregular solid object more accurately

• a

• b

• c

• d

There are two bottles one of them contains an acid and the other contains an alkali, they are required to be identified before being used in a titration.

What are the required tools for carrying out this experiment ? ....... .

• Pipette, burette, conical flask

• Pipette, burette, round-bottom flask

• Glass beaker, graduated cylinder, pipette

• Graduated cylinder, pipette, burette, pH meter.

Which of the burettes which are illustrated in the opposite figure is ready to be used ?

• 1

• 2

• 3

• 4

which of the following is quantitative measurement

• iron conduct electricity more than wood

• titanium is stronger than copper

• the temperature of care engine is 400^oC

• burning of wood gives stronger light than burning of paper

the names of the tools (A)

• graduated cylinder

• sensitive balance

• round-bottom flask

• Pipette

the names of the tools (B)

• graduated cylinder

• conical flask

• round-bottom flask

• Pipette