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EXPERIMENTAL CHEMISTRY

Total questions: 63

Worksheet time: 33mins

Name
Class
Date
1.

Air hole closed means __________ safety flame and air hole open means _________ heating flame.

a)

Yellow, blue

b)

Blue, yellow

c)

Blue, orange

d)

Yellow, green

2.

During an experiment, a bunsen burner is placed on:

a)

Gauze mat

b)

The laboratory bench

c)

A heatproof mat

d)

Tripod

3.

The different parts of a bunsen burner include:

a)

Barrel, collar, air hole, gas hose and base

b)

Barrel, collar, air vent, gase hose and base

c)

Barrel, collar, air vent, gas hose and bottom

d)

Barrel, neck, air hole, gas hose and base

4.

When heating a test tube you.....

a)

Wear safety goggles, use a test tube holder and hold the test tube away from you

b)

Wear safety goggles, use tongs and hold the test tube close to you

c)

Wear safety goggles, use a test tube holder and make sure the flame is only yellow

d)

Wear safety goggles, use tongs and hold the test tube away from you

5.

When you first light a bunsen burner, the flame should be:

a)

Yellow

b)

Blue

c)

Either

d)

Non existent. You shouldn't be using a bunsen burner to light things in the lab

6.

A gauze mat.....

a)

Protects the tripod

b)

Distributes heat evenly

c)

Protects the laboratory bench

d)

Wraps around a test tube to cool it down

7.

When you lift a bunsen burner, you hold it from the:

a)

Barrel

b)

Gas hose

c)

Base

d)

Collar

8.

The hottest part of a flame is _________ degrees celsius.

a)

150

b)

15

c)

15000

d)

1500

9.

A mixture of __________ and __________ burn at the top of the barrel to produce a flame

a)

Air, carbon dioxide

b)

Gas, carbon dioxide

c)

Gas, air

d)

Air, helium

10.

Kai, Elijah, and Arjun are having a science experiment. They need to use a bunsen burner. What should they put under the bunsen burner before they start?

a)

heat proof mat

b)

gauze mat

c)

tripod

d)

peg

11.

Ava, Aiden, and Isla are in a science lab. They are about to perform an experiment that requires the use of gas. When should they turn on the gas?

a)

As soon as they enter the lab

b)

Before they light the match

c)

After they have lit the match and are holding it above the barrel

d)

At the end of the prac

12.

Imagine Benjamin and Kai are in a science lab, ready to light up the bunsen burner for an exciting experiment. Zoe asks, 'What should they do with the airhole before lighting the bunsen burner?'

a)

Open it

b)

Close it

13.

Zoe, Aria, and William are having a debate. Zoe says the yellow flame is the safety flame because it's easier to see and less hot than the blue. Aria thinks it's because it's easier to see and more hot than the blue. Who do you think is correct?

a)

Zoe's argument: It is easier to see and less hot than the blue

b)

Aria's argument: It is easier to see and more hot than the blue

14.

Imagine Avery, James, and Arjun are in a science lab. They are experimenting with heating elements and suddenly they divert their attention away from what they are heating. What should they do next?

a)

Close the airhole, so the yellow safety flame reappears

b)

Open the airhole

c)

Ensure the flame is blue

d)

Nothing - it will be fine

15.

Lily, Hannah, and Samuel are in the science lab. They've just finished an experiment and it's time to clean up. How should they turn off the bunsen burner?

a)

Turn off the gas

b)

Unplug it from the wall

c)

Blow it out like a birthday candle

d)

Just walk away and let it burn

16.

Chemistry is the branch of science which is based on ___________________________

a)

observation

b)

experiments

c)

none

17.

observations help us to draw

a)

scientific notations

b)

scientific conclusions

c)

both

18.

Test tubes are made of

a)

glass

b)

pyrex glass

c)

none

19.

Test tube holder are used to

a)

hold test tube

b)

hold test tubes while they are heated up

c)

none

20.

Supports the apparatus during experiments

a)

tripod stand

b)

tripot stand

c)

none

21.

________________quantities of chemicals should be used.

a)

small

b)

large

c)

very small

22.

this equipment name is . . . .

a)

tongs

b)

spatulas

c)

iron stands

d)

clamps

23.

this equipment name is . . . .

a)

beakers

b)

erlenmeyer flasks

c)

watch glass

d)

petri dishes

24.

this equipment name is . . . .

a)

beakers

b)

conical flasks

c)

watch glass

d)

petri dishes

25.

this equipment name is . . . .

a)

beakers

b)

erlenmeyer flasks

c)

watch glass

d)

petri dishes

26.

this equipment name is . . . .

a)

beakers

b)

erlenmeyer flasks

c)

watch glass

d)

petri dishes

27.

this equipment name is . . . .

a)

volumetric flasks

b)

volumetric pipettes

c)

graduated pipettes

d)

graduated cylinders

28.

this equipment name is . . . .

a)

volumetric flasks

b)

volumetric pipettes

c)

graduated pipettes

d)

graduated cylinders

29.

this equipment name is . . . .

a)

tongs

b)

spatulas

c)

iron stands

d)

clamps

30.

Chemistry is the branch of science which is based on ___________________________

a)

observation

b)

experiments

c)

none

31.

Test tubes are made of

a)

glass

b)

pyrex glass

c)

none

32.

Most of the laboratory apparatus are made of glass

a)

it is transparent material

b)

with stand high temperature

c)

both

33.

Apparatus used for heating small quantity of chemicals

a)

Beaker

b)

Flask

c)

Test tube

d)

Gas jar

34.

Mention the use of this apparatus

a)

For keeping the test tube

b)

For supporting the apparatus during heating

c)

For drying other apparatus

d)

Used as a shelf

35.

Which laboratory apparatus would you use to measure 75ml of water accurately?

a)
b)
c)
d)
36.

What laboratory equipment are you going to use if you want to pour liquids into containers with small openings?

a)

test tube

b)

evaporating dish

c)

glass funnel

37.

Which of the following pieces of chemistry lab equipment is used for pouring substances into a container without spilling?

a)

Funnel

b)

Beaker

c)

Crucible

d)

Erlenmeyer Flask

e)

Bunsen burner

38.

Which of the following pieces of chemistry lab equipment produces a flame from gas that is used for heating substances?

a)

Bunsen burner

b)

Beaker

c)

Crucible

d)

Erlenmeyer Flask

e)

Funnel

39.

What is a mortar and pestle used for?

a)

Crushing and grinding solids into a powder

b)

Scooping up solids such as powder

c)

Cleaning out test tubes

d)

Supporting a beaker or flask when heating

40.

True or False - The scientific method is a method scientists use to conduct an investigation.

a)

True

b)

False

41.

The first step of the scientific method is to

a)

Test your Hypothesis

b)

Draw Conclusions

c)

Make Observations

d)

Ask a Question

42.

This step of the scientific method is about things you notice about the world around you. Things you see, notice, watch, listen to, or look at.

a)

Form a Hypothesis

b)

Draw Conclusions

c)

Test a Hypothesis

d)

Make Observations

43.

How do scientists develop the questions they ask when using the Scientific Method?

a)

Their observations lead them to generate questions

b)

They find a question in a book

c)

They do a lot of research

44.

True or False - Questions used in the Scientific Method must be something that can be measured in some way.

a)

True

b)

False

45.

A prediction, suggested solution, possible explanation, or theory is known as what step in the Scientific Method?

a)

Ask a question

b)

Form a Hypothesis

c)

Test a Hypothesis

d)

Analyze Results

46.

Check off the different ways Scientists can test their hypothesis.

a)

Conduct an experiment

b)

Make a model

c)

Observe something happening

d)

Conduct Research

47.

What are you trying to determine when you analyze your results?

a)

If your hypothesis was correct or incorrect

b)

If you asked a good question

c)

If you will win an award for your work

d)

If you received an A+ on a lab

48.

Making a statement, making sure you answered the question, sharing information, and asking more questions are examples of what step in the Scientific Method?

a)

Form a Hypothesis

b)

Make Observations

c)

Test your Hypothesis

d)

Draw Conclusions

49.

1. Materials made of iron mixed with other materials in a mixture can be separated using this method. What is it?

a)

A. sieving

b)

B. sedimentation

c)

C. magnetism

d)

D. filtration

50.

2. Which process is essential in purifying water?

a)

A. decantation

b)

B. distillation

c)

C. filtration

d)

D. evaporation

51.

Immiscible liquids like oil and water can be separated by pouring or scooping out the topmost liquid. This process is called _______.

a)

A. distillation

b)

B. evaporation

c)

C. filtration

d)

D. decantation

52.

4. Evaporation is used to _______.

a)

A. obtain the solute from the solution

b)

B. separate solids of different particle size

c)

C. separate the dyes in a marker

d)

D. separate liquids of different boiling points

53.

5. Which mixtures CANNOT be separated through picking?

a)

A. grains and mongo seeds

b)

B. sliced fruits

c)

C. oil and vinegar

d)

D. nails and pins

54.

6. This process involves separating solid particles from a liquid substance using a piece of cloth.

a)

A. decantation

b)

B. filtration

c)

C. evaporation

d)

D. using a magnet

55.

7. To separate rocks into different sized particles for road building and other construction projects, which method is applicable?

a)

A. sieving

b)

B. winnowing

c)

C. picking

d)

D. threshing

56.

8. What is winnowing?

a)

A. It is the process of freeing (grain) from the lighter particles of chaff, dirt, etc.

b)

B. Is used to separate smaller solid particles from larger solid particles.

c)

C. Picking of small particles to larger

d)

D. Both B and C

57.

9. Kidneys clean our blood through which process?

a)

A. distillation

b)

B. evaporation

c)

C. . decantation

d)

D. filtration

58.

10. What is the process by which water changes from a liquid to gas or vapor?

a)

A. filtration

b)

B. evaporation

c)

C. mixture

d)

D. decantation

59.

11. What is the appropriate method to use to separate needles in a box of beads?

a)

sieving

b)

decantation

c)

using magnet

d)

threshing

60.

12. What is the appropriate method to obtain freshly squeezed coconut milk ?

a)

evaporation

b)

filtration

c)

decantation

d)

distillation

61.

13. What is the appropriate method to separate rice and water?

a)

evaporation

b)

filtration

c)

decantation

d)

distillation

62.

14. In the distillation apparatus shown, what are the parts labeled as A and B?

a)

A. A - funnel and B - thermometer

b)

B. A – thermometer and B - funnel

c)

C. A – condenser and B - thermometer

d)

D. A – condenser and B - flask

63.

15. What is the method used to obtain gasoline?

a)

A. distillation

b)

B. evaporation

c)

C. decantation

d)

D. filtration