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Important Questions for s and p Block Elements

S and P Block Chemistry Online Test

s and p Block Elements - Representative Elements

Question 1
Sodium metal cannot be stored under
A
Kerosene
B
Toluene
C
Benzene
D
Alcohol
Question 2
The difference of water molecules in gypsum and plaster of paris is
A
2
B
½
C
5/2
D
Question 3
A
Sulphur ore
B
None of these
C
Silicon ore
D
Carbonate ore
Question 4
Potassium is kept in
A
Liquid ammonia
B
Kerosene
C
Water
D
Alcohol
Question 5
The element having atomic number 56 belongs to
A
Lanthanides
B
Alkaline earth metals
C
Transition series
D
Actinides
Question 6
Sulphuric acid reacts with PCl5 to give
A
Sulphur tetrachloride
B
Sulphuryl chloride
C
Sulphur monochloride
D
Thionyl chloride
Question 7
The dark red colour of bombs in fireworks is due to the presence of
A
K
B
Na
C
Ba
D
Sr
Question 8
Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it
A
Forms a corrosion-resistance alloy with iron
B
is more readily converted into positive ions
C
Is higher than iron
D
Prevents air from reaching the surface of iron
Question 9
The reactivity of the alkali metal sodium with water, is made use of

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A
In drying of ammonia solution
B
In drying of alcohols
C
In drying of benzene
D
As a general drying agent
Question 10
The number of hydroxide ions produced by one molecule of sodium carbonate (Na2CO3) on hydrolysis is

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A
2
B
3
C
1
D
4
Question 11
Portland cement is manufactured by using
A
Lime stone, gypsum and alumina
B
Lime stone, gypsum and sand
C
Lime stone, clay and gypsum
D
Lime stone, clay and sand
Question 12
Which of the following will not undergo hydrolysis in water?
A
Calcium sulphate
B
All the salts will hydrolyse
C
Ammonium sulphate
D
Sodium sulphate
Question 13
The reaction of water with sodium and potassium is
A
Exothermic
B
Endothermic
C
Irreversible and endothermic
D
Reversible
Question 14
Slaked lime is used in the manufacture of
A
Fire bricks
B
Cement
C
Pigment
D
Medicine
Question 15
As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as
A
Strong reducing agent
B
Strong oxidising agent
C
Weak oxidising agent
D
Weak reducing agent
Question 16
Molten sodium is used in nuclear reactors to
A
Slow down the fast neutrons
B
Extract radio-isotopes produced in the reactor
C
Absorb neutrons in order to control the chain reaction
D
Absorb the heat generated by nuclear fission
Question 17
When orthoboric acid (H3BO3) is heated, the residue left is?
A
Boric anhydride
B
Boron
C
Metaboric acid
D
Borax
Question 18
The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because

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A
There is no change in the nuclear charge
B
There is decreases in the nuclear charge of the alkaline earth metals
C
There is increases in the nuclear charge of the alkaline earth metals
D
None of these
Question 19
Calcium salts give which colour when put in a flame
A
Green
B
Brick red
C
Pink
D
White
Question 20
As compared to potassium, sodium has
A
Greater atomic radius
B
Higher ionization potential
C
Lower melting point
D
Lower electronegativity
Question 21
Potassium nitrate is called
A
Indian salt petre
B
Chile salt petre
C
Mohr's salt
D
Gypsum
Question 22
Which of the following has density greater than water?
A
Na
B
Rb
C
Li
D
K
There are 22 questions to complete.
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Vishal Arora

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