Assertion : Finely divided iron does not form ferric chloride with hydrochloric acid.

Reason :  Hydrochloric acid produces hydrogen gas with iron.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false

Concept Questions :-

group 17 ,preparation and properties
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Assertion : XeF6 reacts with small quantity of water to form XeOF4.

Reason : XeF6 reacts with glass and form XeOF4.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false

Concept Questions :-

group 18,perparation and properties
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Which one of the following does not exist?

(A) XeOF4

(B) NeF2

(C) XeF2

(D) XeF6 

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The hybridisation of atomic orbitals of nitrogen in NO2+,NO3- and NH4+ are 

(A) sp, sp3 and sp2 respectively

(B) sp, sp2 and sp3 respectively

(C) sp2, sp and sp3 respectively

(D) sp2, sp3 and sp respectively

Concept Questions :-

group 15 ,preparation and properties
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Which of the following hydrides is most acidic

(A) H2Te

(B) H2Se

(C) H2O

(D) H2S

Concept Questions :-

group 16,preparation and properties
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Which of the following is incorrect about H2SO4

(A) It can act as oxidising agent with copper

(B) It acts as dehydrating agent with sugar

(C) It acts as acid in its reaction with BaO2

(D) It acts as reducing agent in its reaction with Cu2O

Concept Questions :-

group 16,preparation and properties
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Which of the following oxide is most acidic

(A) Na2O

(B) Al2O3

(C) P2O5

(D) SO3

Concept Questions :-

group 16,preparation and properties
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Which among the following is least acidic

(A) P4O6 

(B) P4O10 

(C) As4O6 

(D) As4O10 

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group 15 ,preparation and properties
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Which of the following polyhalide ion is most stable

(A) Br3- 

(B) I3- 

(C) Cl3- 

(D) F3- 

Concept Questions :-

group 17 ,preparation and properties
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A diamagnetic element burns in air to form a dioxide.This dioxide can reduce iodine to HI. When H2 gas is bubbled through this element, it forms a hydride.It was found that the reaction of the dioxide and hydride of this element produces the same metal again.The element is

(A) S

(B) Si

(C) Te

(D) PO

Concept Questions :-

group 16,preparation and properties
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