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PPSC Chemistry Part III Inorganic Chemistry Online Test MCQs With Answers
Question # 1
Acid rain effects
Choose an answer
Human being
Crops
Aquatic life
All above
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Question # 2
Formula of orthophosphoric acid.
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H2PO4
H3PO3
H3PO2
H4P2O5
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Question # 3
Which of the following reactions is employed to produce ozone in the laboratory.
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Exposure of air to UV light
Reaction of F2 with H2O at low temperature
Reaction SO2 with H2O2
Passage of silent electric discharge through oxygen
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Question # 4
Which one of the following statements is not true.
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Transition metals form alloys
Transition metals form complexes
Zn, Cd and Hg are transition metals
K2[PtCl6] is a well known compound but corresponding nikel compound is not knonwn
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Question # 5
Metal are generally elements
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Electronegative
Electropositive
Neutral
None of the above
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Question # 6
The electron gain enthalpy of chlorine is -349 Kj mol-1 ionization energy of Cl would be.
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-349 kJ mol -1
349 kJ mol-1
-698 kJ mol-1
698 kJ mol-1
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Question # 7
Which one of the following ionsis colourless.
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Cu+
Ni2+
Co2+
Fe3+
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Question # 8
Which of the following is the most abundant alkaline earth metal.
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Be
Mg
Ca
Sr
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Question # 9
Zero group elements are called as
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Inert gases
Rare gases
Noble gases
All of above
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Question # 10
The law of triads is applicable to
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Lithium, beryllium, boron
Fluorine, chlorine, bromine
Chlorine, bromine, iodine
Sodium, potassium, Rubidium
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Question # 11
In which property listed below hydrogen does not resemble alkali metals.
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Tendency to form cation
Nature of oxide
Combination with halogens
Reducing character.
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Question # 12
Which of the following is soluble in water.
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AgF
AgCl
AgBr
Ag I
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Question # 13
In B2H6 molecule
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There exists a direct B-B a -bond
All the atoms are in one plane
All the B-H bonds are normal covalent bonds
There exist two bonds between the boron atoms.
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Question # 14
Pick out the incorrect statement
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The geometry around 'N' atom in trimethylamine is pyramidal
The geometry around N atom in trisilylamine is planar
The nitrogen atim is trimethylamine is sp2 hybridized whilst in trisilylamine it is sp2 hybridized
Trisilylamine has donor properties whilst trimethylamine has no donor properties.
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Question # 15
The commonly used catalyst in the manufacture of H2SO4
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Fe2O3 with a little CuO
v2O5
Platinized asbestos and MgSO4
All above
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Question # 16
Metal are
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Hard
Ductile
Malleable
All
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Question # 17
Fluorine is.
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Powerful oxidizing agent
Most reactive element
Used as refrigerants
All of above
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Question # 18
Among the elements A,B,C and D having atomic numbers 9,10,11, and 12 respectively, the correct order of ionization energies is.
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A > B > C >D
B > A > D > C
B > A > C > D
D > C > B > A
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Question # 19
In whihc period, the element with least ionization enthalpy belong to
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Group I
Group 2
Group 17
Group 18
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Question # 20
Which of the following elements would have the lowest first ionization energy
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Mg
Rb
Li
Ca
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Question # 21
The nature of bonds in compounds of carbon and silicon is mostly
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Covalent
Electrovalent
Metallic
Both A and B
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