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WorksheetsC3 Testing for salts and gases
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
A powder is placed into a bunsen burner flame. The colour of the flame is red. The ion is
a)
Na
b)
Li+
c)
Cu2+
d)
Ca
2.
A powder is placed into a bunsen burner flame. The colour of the flame is orange. The ion is
a)
Na+
b)
Li+
c)
Ca2+
d)
K+
3.
Silver nitrate and Nitric acid were mixed with an unknown solution. A cream ppt formed. The formula of the ion present is
a)
I-
b)
Br+
c)
Br-
d)
Cl+
4.
Silver nitrate and Nitric acid were mixed with an unknown solution. A yellow ppt formed. The formula of the ion present is
a)
I2
b)
I+
c)
I-
d)
Br-
5.
NaOH is added to an unknown solution. A orange-brown ppt forms. The formula of the ion is:
a)
Fe2+
b)
Fe3+
c)
Cu2+
d)
Cl-
6.
How do you test for carbon dioxide gas?
a)
Turns limewater milky
b)
Relights a glowing splint
c)
Makes a squeaky pop with a splint
d)
Bleaches damp litmus paper
7.
How do you test for oxygen gas?
a)
Makes a squeaky pop with a lit splint
b)
Relights a glowing splint
c)
Bleaches damp litmus paper
d)
Turns limewater milky
8.
How do you test for Chlorine gas?
a)
Bleaches damp litmus paper
b)
Makes a squeaky pop with a lit splint
c)
Relights a glowing splint
d)
Turns limewater milky
9.
Li+ produces what colour flame?
a)
Yellow
b)
Green
c)
Lilac
d)
Orange
10.
Br- stands for
a)
Bromine
b)
Bromine atom
c)
Bromide
d)
Bromium
11.
Flame colour for calcium ions
a)
Blue
b)
Brick Red
c)
Green
d)
Yellow
12.
Colour of precipitate when sodium hydroxide is added to a iron(III) ion solution.
a)
White
b)
Reddish-Brown
c)
Green
d)
Blue
13.
Colour of precipitate when sodium hydroxide is added to a iron(II) ion solution.
a)
White
b)
Brown
c)
Green
d)
Blue
14.
Test for bromide ions is....
a)
Add hydrochloric acid. creamy precipitate
b)
Add barium chloride, creamy precipitate
c)
Add nitric acid then silver nitrate, creamy precipitate
15.
Test for carbonate ions is....
a)
Add acid, test CO2 gas with limewater
b)
Add barium chloride, test CO2 gas with limewater
c)
Add silver nitrate, test CO2 gas with limewater
16.
When Copper sulfate is mixed with sodium hydroxide
a)
white precipitate
b)
Blue precipitate
c)
lilac colour
d)
no change
17.
Flame colour for Barium ions
a)
blue streaks
b)
brick Red
c)
apple Green
d)
Yellow
18.
The best test for oxygen is that
a)
it relights a glowing spling
b)
it relights a burning splint
c)
it changes lime water to milky
d)
it makes a glowing splint go out
19.
Carbon dioxide can be tested by using
a)
a glowing splint
b)
a burning splint
c)
hydrogencarbonate indicator
d)
lime water
20.
A burning splint burns longer in unbreathed air than in breathed air. This shows that
a)
Breathed air has more carbon dioxide.
b)
Breathed air has less oxygen.
c)
Breathed air has more water vapour.
d)
Breathed air has more noble gases.
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