P BLOCK ELEMENTS IPE 2025 IMPORTANT QUESTIONS-P BLOCK ELEMENTS

                                           P- BLOCK ELEMENTS-2 Marks
1.Allotropy : If an element exists in different physical forms but shows same chemical properties ,this property is called ALLOTROPY
eg.Diamond,Graphite,Fullerene.

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2.Hybridisation of Carbon in
1.CO₃^-2 = SP² 4.Diamond = SP³
2.Graphite = SP²
3.Fullerene = SP²

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3.Man made silicates -🡪1.Glass and 2. Cement

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4.CO is poisonous because it combines with Hb and forms
“CARBOXY HAEMOGLOBIN “

Hb + Co 🡪 Hb-Co

It is 300 times more stable than oxy haemoglobin.
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5.What is Water gas and Producer gas ?

P BLOCK ELEMENTS IPE 2025 IMPORTANT QUESTIONS

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6.Diamond is hard because

1.SP³ Hybridisation
2.It has 3D structure.
3.Each carbon is linked to 4 other carbon atoms in “TETRAHEDRAL “manner
4.Energy required to break the bond is very high (348 KJ/mol )

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7.Graphite act’s as Good Conductor and Lubricant because::

1. Soft,Slippery in nature.

 2. SP² hybridisation is present

3.Weak vanderwaals forces are present.

4.Layers slide one over the other

5.Free electrons are present in P-Orbital

P BLOCK ELEMENTS IPE 2025 IMPORTANT QUESTIONS

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8. DRY ICE ::
Solid CO₂ is called as DRY ICE .Used as
①Fire Extinguisher ② .Manufacture of urea ③Refrigerant for ice-creams.

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9.INERT PAIR EFFECT : The ns electrons doesn’t show intrest in bond formation is called “INERT PAIR EFFECT “
                                                       OR
The reluctance of ns electrons to take part in bond formation is called inert pair effect
Ex: Lead (Pb) shows +2 oxidation state instead of +4 oxidation state.
     Thallium (Tl) shows +1 oxidation state instead of +3 oxidation state.

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10.Silicones : Organo Silicon Polymers containing Si-O-Si linkage.
2. Contains R2SiO repeating units
3.Structure similar to Ketones.

Uses :

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11. ZSM-5

1. Zeolite Socony Mobil-5
2.It is a type of Zeolite.
3.Used for conversion of Alcohols into Gasoline directly.

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12.BF3 act’s as a Lewis acid because :
①It is an electron deficient compound
②The central atom B has 6 electrons,it
requires 2 electrons to get Octet Configuration .

③According to Lewis ,Acid means,
electron pair acceptor hence BF3 act’s as Lewis Acid

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13. INORGANIC BENZENE :–

①Borazine is called as “INORGANIC BENZENE”
②Its formula is B₃N₃H₆

③Its structure is similar to BENZENE

P BLOCK ELEMENTS IPE 2025 IMPORTANT QUESTIONS

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14.Diagrams of Diamond & Graphite

P BLOCK ELEMENTS IPE 2025 IMPORTANT QUESTIONS