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Assertion : Si-Si bonds are much weaker than Si-O bonds.
Reason : Silicon forms double bonds with itself.

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Important Questions on The p-Block Elements

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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 3>Q 45
Assertion: Chlorine and sulphur dioxide both are bleaching agents.
Reason: The bleaching action of chlorine and sulphur dioxide is performed through the process of oxidation.
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 3>Q 46
Assertion: Most of the reactions of fluorine are exothermic.
Reason: Fluorine atom is smaller and forms strong bonds with other elements and has low dissociation energy of the F-F bond.
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 3>Q 49
Asserion: Noble gases have very low boiling points.
Reason : Noble gases being monoatomic have no interatomic forces except weak dispersion forces.
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 3>Q 50
Assertion: In a period noble gas has smallest atomic radius.
Reason: In case of noble gases atomic radii are taken as covalent radii.
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 3>Q 51
Assertion : Pb4+ compounds are stronger oxidizing agents than Sn4+ compounds
Reason : The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to "inert pair effect".
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 1
Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable that other, in :
 
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 4
The wrong statement about fullerene is:
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 5
Assertion : R3P=O exists R3N=O does not exist.
Reason : P is more electronegative than N.