Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 3>Q 49

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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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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 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 :

{Pb}^{4 +}

compounds are stronger oxidizing agents than

{Sn}^{4 +}

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 :

R_{3} P = O

exists

R_{3} N = O

does not exist.
Reason :

P

is more electronegative than

N

.

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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 8

Which of the following is the increasing order of enthalpy of vaporisation?

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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 13

The oxidation number of sulphur in

S_{8}, S_{2} F_{2}, H_{2} S

respectively are

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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 16

Assertion: Elementary phosphorus exists in three principal allotropic forms, i.e., white (or yellow), red (or violet) and black.

Reason: Of the three forms, white phosphorus is the most important and most reactive.