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Worksheetsp Block elements(15,16,17,18)
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
Nitrogen shows maximum covalency of
a)
3
b)
4
c)
5
d)
none of these
2.
Phosphine has -------------------like smell
a)
fish
b)
egg
c)
flower
d)
none of th
3.
How many valence electrons are in the element iodine?
a)
1
b)
4
c)
7
d)
8
4.
Colours of group 7 elements are....
a)
Chlorine- pale yellow/green, Bromine orange/brown, iodine - grey shiny
b)
Chlorine- grey shiny, Bromine orange/brown, iodine - Yellow
5.
States of group 7 elements are ...
a)
fluorine - liquid, chlorine - gas, Bromine liquid, iodine solid
b)
fluorine - gas, chlorine - gas, Bromine liquid, iodine gas
c)
fluorine - gas, chlorine - gas, Bromine liquid, iodine solid
d)
fluorine - gas, chlorine - gas, Bromine gas, iodine solid
6.
When you mix chlorine water and sodium bromide solution you will see
a)
an orange brown colour
b)
fizzing
c)
blue colour
d)
no change
7.
Balance the ionic equation:
Cl2 + KBr → Br2 + KCl
Cl2 + KBr → Br2 + KCl
a)
Cl2 + 2KBr → Br2 + 2KCl
b)
Cl2 + 2KBr → Br2 + KCl
c)
Cl2 + KBr → Br2 + 2KCl
8.
What does the combination of Chlorine gas and Water produce?
a)
Hydrobromic Acid
b)
Phosgene
c)
Hydrochloric Acid
d)
Chlorine and Carbon Monoxide
9.
What was the chemical that was used by the Germans that made Chlorine more lethal?
a)
Hydrobromic Acid
b)
Hydrochloric Acid
c)
Diphosphate
d)
Phosgene COCl2
10.
What was the name of the combination of chlorine gas and carbon monoxide gas that was 18 times more powerful than Chlorine?
a)
Mustard
b)
DiPhosgene
c)
Phosgene
d)
Chlorine 3
11.
What did Haber synthesize for Nobel Peace Prize?
a)
Chlorine gas
b)
Mustard gas
c)
Synthesizing Ammonia
d)
Dynamite
12.
The bleaching action of SO2 is
a)
pertmanent
b)
temprory
c)
can not say
13.
True or False; Krypton is colourless and odourless
a)
True
b)
False
14.
Which one of these gases gives you a high voice when you inhale it?
a)
Helum
b)
Krypton
c)
Neon
d)
Helium
15.
Which noble gas is found in signs or light displays?
a)
Krypton
b)
Helium
c)
Argon
d)
Neon
16.
Glows red/orange when electricity is passed through it.
a)
Helium
b)
Neon
c)
Argon
d)
Oxgyen
17.
Least reactive noble gas.
a)
Xenon
b)
Radon
c)
Krpton
d)
Helium
18.
Most reactive elemental gas.
a)
Oxygen
b)
Fluorine
c)
Chlorine
d)
Hydrogen
19.
Radioactive gas often found in basements. Formed from the radioactive decay of Radium.
a)
Fluorine
b)
Chlorine
c)
Xenon
d)
Radon
20.
Which of the following noble gases is most prevalent in the atmosphere?
a)
helium
b)
argon
c)
radon
d)
xenon
21.
Chalcogens are
a)
Group 15 elements
b)
Group 16 elements
c)
Group 17 elements
d)
Group 18 elements
22.
Which gas is often super-cooled and used as a liquid to remove warts?
a)
nitrogen
b)
oxygen
c)
helium
d)
carbon dioxide
23.
Presence of ozone can be detected by
a)
FeS
b)
CuS
c)
PbS
d)
none of these
24.
What is the coordination number of Fluorine in HOF?
a)
-1
b)
0
c)
+1
d)
none of these
25.
Ozone is used to bleach flour/starch and prefered over SO2 and Cl2, because
a)
ozone can bleach flour only
b)
ozone is a dry bleaching agent
c)
ozone is non poisonous
d)
none of these
26.
Which of the following ion has maximum oxidising power
a)
ClO4-
b)
BrO4-
c)
IO4-
d)
none of these
27.
How many P-OH bonds are there in Phosphinic acid?
a)
1
b)
2
c)
3
d)
none of these
28.
Which one of the following is an antichlor agent?
a)
SO2
b)
SO3
c)
NH3
d)
PH3
29.
Which is used as dehydrating agent for dehydration of Ammonia?
a)
H2SO4
b)
H3PO4
c)
CaO
d)
NONE OF THESE
30.
Which has highest boiling agent
a)
NH3
b)
PH3
c)
AsH3
d)
BiH3
31.
Conc HNO3 is yellow in colour due to presence of
a)
NO2 dissolve in it
b)
NO dissolve in it
c)
N2O dissolve in it
d)
N2O3 dissolve in it
32.
How many elements are in the Noble Gas family?
a)
4
b)
5
c)
6
d)
7
33.
Which of the following is a noble gas that is heavier than air?
a)
Hydrogen
b)
Helium
c)
Argon
d)
Sodium
34.
At room temperature, iodine is a....
a)
Gas
b)
Liquid
c)
Solid
35.
All elements in the Halogen family react violently because
a)
Halogens have 1 valence electron that they give away readily to other elements in reactions
b)
Halogens have 7 valence electrons which gives up massive energy when they give all seven to other elements
c)
Halogens need only 1 electron which they will violently take from other elements
d)
Halogens only react violently with water
36.
Lack of Iodine can lead to persons experiencing dry eyes and dry mouth.
a)
TRUE
b)
FALSE
37.
What is the formula for phosphorous acid?
a)
H3PO4
b)
H2PO4
c)
H3P
d)
H3PO3
38.
Bromic acid
a)
HBr
b)
H2Br
c)
HBrO3
d)
HBrO4
39.
Chlorous acid
a)
HClO3
b)
HClO2
c)
HClO
d)
HCl
40.
Can cause burning of the skin
a)
Lead
b)
Particle matter
c)
Sulfur dioxide
d)
Nitrogen oxides
41.
The shape of XeF4 is
a)
tetrahedral
b)
triangularpyramidal
c)
square planer
d)
none of these
42.
What is the formula for perchloric acid?
a)
H3ClO3
b)
H3ClO4
c)
HClO3
d)
HClO4
43.
White phosphorous has characteristic
a)
Onion like smell
b)
Garlic like smell
c)
Egg like smell
d)
Fish like smell
44.
Which compound was the first compound of noble gas?
a)
XePtF6
b)
ArPtF6
c)
NePtF6
d)
none
45.
The shape of XeOF2 is
a)
linear
b)
T shaped
c)
Pyramidal
d)
none
46.
The hybridisation in XeOF4 is
a)
sp2
b)
sp3
c)
sp3d
d)
sp3d2
47.
One example of pseudohalogen is
a)
CO2
b)
SO3
c)
(CN)2
d)
ICl
48.
Thermal stability of hydrides of group 15 element is as per order
a)
NH3>PH3>AsH3>SbH3>BiH3
b)
NH3<PH3<AsH3<SbH3<BiH3
c)
AsH3>SbH3>BiH3>NH3>PH3
d)
NH3>PH3>AsH3>SbH3>BiH3NH3PH3>AsH3>SbH3>BiH3>NH3
49.
Pure H2SO4 is viscous due to presence of
a)
inter molecular H-bondind
b)
intra molecular H-bondind
c)
vanderWaal's force
d)
none
50.
SO2 can be dried by
a)
H2SO4
b)
CaO
c)
H3PO4
d)
NONE OF THESE
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