China Mathematical English Physical Chemistry
20 10
—
20 1 1
Test questions of chemical quality and ability in the first semester of ninth grade
Fourth unit
The mystery of material composition
Reference answer
Title number
1
2
three
four
five
six
seven
eight
nine
10
1 1
12
13
14
15
answer
B
B
C
B
C
C
A
B
D
C
D
C
B
C
A
16
、
(1) molecules and atoms
(2), molecules and atoms
(3) atoms
(4) Protons and nuclei
(5), electronic
Six molecules,
Atoms and neutrons
All landowners, electronics
(8) Nuclei (or protons and neutrons)
17
、
Both contain oxygen atoms; Different molecular compositions
18
、①、
②、
Continuing education (UK)
2
(So
four
)
three
③、
magnesium
2+
④、
3Al
⑤、
4Cl
-
⑥
5H
2
O
19
、①、
10
、
neon
②、
12
、
magnesium
2+
③、
eight
、
O
2-
20
1.UDMH consists of three elements: carbon, hydrogen and nitrogen;
② A unsymmetrical dimethylhydrazine molecule consists of two carbon atoms, eight hydrogen atoms and two nitrogen atoms;
③
2 1
、
(
1
)
、
16
、
seven
; Fluorine (
2
)
、
magnesium
2+
, neon;
(
three
) The number of outermost electrons in the same row (or column) increases in turn.
The outermost electron number is the same)
(Other answers are reasonable. )
22
、
(
1
)
、
+5
(
2
)
、
23
24
(
three
)
200 grams
×
0.76
%×
19/ 144
×
100
%=
0.2g
Yuechi county chengguan high school
20 1 1
High school chemistry unit 1 and unit 2 comprehensive examination questions
Reference answer
First, multiple-choice questions (each
2
Points, * * * *
40
Integral)
1
2
three
four
five
six
seven
eight
nine
10
C
D
D
B
D
B
B
B
A
B
1 1
12
13
14
15
16
17
18
19
20
A
C
D
B
A
C
D
C
A
D
two
.
Fill in the blanks (each text expression
2
Point, the rest are empty.
1
Points, * * * *
4 1
Integral)
2 1.F
、
C
、
D
、
D
、
A
22.
Carbon dioxide, nitrogen, water vapor, oxygen
23.
Jar, medicine spoon, tweezers; Flask, dropper, measuring cylinder;
1
—
2
Cover the bottom of the test tube.
24.
④⑦,⑤⑥
25.
① Hydrogen peroxide, manganese dioxide, water, oxygen, sulfur and sulfur dioxide
②
Catalyze, decompose
③
Combination.
26. Nitrogen, iron, copper, potassium, phosphorus and calcium
2
Commander (commanding officer)
2
H
2
O
three
.
Experiment and explore questions (each blank)
1
Points, * * * *
19
Integral)
27.
(1) Test tubes, alcohol lamps, gas cylinders and water tanks.
⑵
A
Prevent potassium permanganate powder from entering respiratory tract.
⑶
B
, manganese dioxide, no heating, simple operation, etc.
⑷
C
or
D
Oxygen is not soluble in water or the density of oxygen is slightly higher than that of air, which is released continuously and evenly, causing the test tube to burst; will
The wooden strips with sparks extend all the way to the bottle mouth. If the wood is rekindled, it proves that all oxygen has been collected.
⑸
A
、
C
28.
(1) temperature, catalyst
(2) The higher the concentration, the faster the decomposition rate of hydrogen peroxide (or the higher the temperature, the faster the decomposition rate of hydrogen peroxide; use
Catalyst, the faster the decomposition rate of hydrogen peroxide)
20 10
~
20 1 1
study
year
degree
collect
undoubted
sequence
one
middle
study
nine
year
level
change
study
single
Yuan dynasty (1206- 1368)
measure
attempt
line
word
sequence
one
single
Yuan dynasty (1206- 1368)
go to
enter
change
study
produce
boundary
Reference answer
15
Don't touch drugs with your hands.
Don't taste any medicine.
16
、
External flame
、
Inner flame
, flame center
. External flame
17
Plain.
The lowest point of concave liquid level
small
18
, left disk
Right disk
tweezers
19
Turn it upside down.
control
20
、(
1
)
E
(
2
)
C
(
three
)
ab blood type
(
four
)
G
(
five
)
H
(
six
)
F
(
seven
)
D
(
eight
)
B
2 1
、(
1
) beaker (
2
) test tube (
three
) evaporating dish
22
、
23
、
When that liquid in the measure cylinder approaches the scale line,
Suck the liquid with a dropper and add it to the balance:
When reading, the measuring cylinder is placed smoothly.
Make it look like
The line is flush with the lowest part of the concave surface of the liquid level.
Place the test tube horizontally,
Then take out the massive solid with tweezers and put it at the mouth of the test tube.
Then slowly erect the test tube,
Let the solid slide slowly
The bottom of a test tube.
24
、
1
2
three
four
five
six
seven
eight
nine
10
1 1
12
13
14
C
C
B
D
D
D
D
B
B
B
B
C
C
C
25
、
(
1
)⑥
(
2
)
spirit lamp
beaker
(
three
) evaporating dish
(
four
) No.
26
、
27
, carbon
+
oxygen
======
carbon dioxide
The external flame contacts the air (oxygen) more fully.
Inner flame
a
alcohol concentration
Expose the wick length of alcohol lamp (score all other reasonable answers)
Chong Qing Fengmingshan Middle School
20 10-20 1 1
Ninth grade chemistry school year
First unit
Entering the world of chemistry "
unit testing
First unit
Entering the world of chemistry "
Unit test answer
First, multiple-choice questions:
(There is only one correct answer to each question, * * *)
30
Integral)
Title number
1
2
three
four
five
six
seven
eight
nine
10
1 1
12
13
14
15
answer
D
D
C
B
B
B
A
C
B
C
D
A
A
C
A
Second,
Fill in the question:
(every empty
1
Points, * * * *
15
Integral)
16
、
①
②
③
Oxygen can supply breathing and support combustion, but inhaling too much oxygen can cause poisoning; Chemical fertilizer can increase the yield of crops, but it will cause soil.
The pollution of soil and water is harmful to human health and so on.
Use less fossil fuels such as coal, oil and natural gas, and use more clean energy such as solar energy, wind energy and geothermal energy; Vigorously plant trees and prohibit indiscriminate logging.
Deforestation.
17
、?
②
⑤
④
⑥
⑧
③
⑦
①
18
、?
Medicine spoon
Check air tightness
fail
Wet rag or sand
You shouldn't fight in the lab; You can't eat food (or taste medicine) in the laboratory.
; Do not directly heat the test tube by hand; You can't put the beaker
Put it directly on the alcohol lamp to heat energy; Can't directly pour waste liquid into the pool; Use a tube clamp, and don't press your hand on the short handle.
Third, I will explore (
25
Integral)
19
、
experimental procedure
Verification basis
1
. use
row
water
Methods Two bottles of exhaled gas were collected, and the other two bottles were collected.
A bottle of air.
2
Drop clear water into exhaled gas and air respectively.
In a gas container.
according to
Stoneboog
ash
water
muddy
disordered/chaotic/confused
travel
degree
no
the same
, judging carbon dioxide
The content is different.
three
Put fuel rod into exhaled gas and air respectively.
In a gas container.
According to the different combustion conditions of wood strips, the oxygen content is also different.
four
Take two pieces of dry glass and exhale into one of them.
according to
According to the different judgment of water mist on glass sheet, the water content is different.
Judging water content
The quantity is different.
light
20
, Jiang
Comparison project
Experimental operation
Experimental phenomenon
come to a conclusion
carbon dioxide content
quantity
Drop clear limewater into the container respectively.
There is morning air and sunshine.
In the air container.
Lime water is obvious in the early morning air.
Become turbid,
Stones in the air after sunlight.
There is no obvious change in grey water.
Carbon dioxide in the air in the morning
Compared with the air after sunshine.
Zhonggeng
many
oxygen content
Put the fuel rod into the container separately.
There is morning air and sunshine.
In the air container.
In the early morning air
The slats soon went out.
Extinguish,
Wood that burns in the air after sunlight.
Burning more vigorously.
Oxygen content in the air in the morning
Than in the air after sunlight.
Very few
2 1
、?
Fill in the form:
Experimental operation
Experimental phenomenon
Experimental conclusion
Take a candle and cut a small piece with a knife.
Put it in the water
paraffin
Floating on the water.
Paraffin wax is denser than water.
Small.
Light candles,
Put a match on the candle.
In the flame
1
Take it out and observe.
Matchstick
both ends
Carbonization first.
Candle flame
External flame
The layer temperature is the highest.
Cover the candle flame with a dry beaker.
Above,
After a while, take off the beaker.
rapidly
Pour a small amount of clear limewater into the beaker and shake.
Swing.
The inner wall of beaker appears
Water mist, clarified limewater
Become turbid.
Paraffin wax is produced by combustion.
water
and
dioxide
Carbon.
C
①
low temperature
②
guess
phenomenon
Suppose 1
The gas in the center of the flame is carbon monoxide.
The mouth of the catheter can be ignited, the towel can be opened, and there is no paraffin solid in the catheter.
Hypothesis ②
The gas in the center of the flame is paraffin vapor.
The catheter won't ignite. Open the towel. There are paraffin solids in the catheter.
Assumption ③
The gas in the center of the flame contains paraffin vapor and carbon monoxide.
The mouth of the catheter can be ignited, the towel can be opened, and there is paraffin solid in the catheter.
Unit 1 of ninth grade chemistry in Dunhuang No.3 Middle School.
Unit 1 of ninth grade chemistry in Dunhuang No.3 Middle School.
Reference answer
1.
C
2.
C
3.
B
4.
C
5.
A
6.
C
7.
D
8.
B
9.
D
10.
C
1 1.
B
12.
C
13.
B
14.
A
15.
B
16.
form
structure
nature
Change rules
17.
corrode
poison
hand
smell
taste
18.
A.
table balance
B.
tweezers
D.
Something that drips
E.
Medicine spoon
①
E
②
C
③
D
④
A
19.
① Fine-necked bottle
turn upside down
Lean on the palm of your hand
approach
② Flat
The lowest point of concave liquid level
(3) condensed into water droplets.
Run down in a stream.
20.
(
1
) beaker; Glass rod.
(
2
) right; Glassware (or small beaker or watch mirror)
(
three
) flat; too large
2 1.
(
1
) beaker
test tube clamp
measuring cylinder
Alcohol lamp (
2
)①
A
②
D
③
B
④
C
22.
(
1
) The test tube is upright.
(
2
) The label is facing down.
(
three
) test tube mouth and reagent bottle mouth leave (
four
) The cork is on the table.
23.
(
1
) too hard when scrubbing the test tube.
(
2
) When heated with an alcohol lamp, the test tube is in contact with the wick.
(
three
) heating
There is water on the outer wall of the test tube.
(
four
)
Rinse the hot test tube with cold water immediately.
(
five
)
The test tube was not preheated when it was heated.
(
six
)
When taking APIs, the test tube should be placed vertically (just answer four points)
24.
Experimental phenomenon
conclusion
steam
hot
More carbon dioxide
22
Water can't completely enter an empty cup.
There is another way to prove that the empty cup is full of air, and the operation method and phenomenon are reasonable, that is
can
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