MCQ on The P Block Elements for Class 11 With Answers | The P Block Elements MCQs
Questions
1
Identify the correct resonance structures of carbon dioxide from the ones given below :
Answer:B, D
2
Assertion (A): If aluminium atoms replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquires a negative charge.
Reason (R) : Aluminium is trivalent while silicon is tetravalent.
Answer:Both A and R are correct and R is the correct explanation of A.
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3
Assertion (A): Silicons are water repelling in nature.
Reason (R) : Silicons are organosilicon polymers, which have (–R2SiO–) as repeating unit.
Answer:Both A and R are correct but R is not the correct explanation of A.
5
Which of the statement is incorrect for XeO4 ?
Answer:It has a square planar shape
8
Which is the correct order of decreasing bond dissociation enthalpy?
Answer:Cl2 > Br2 > F2 > I2
10
In the presence of KF, AlF3 is soluble in HF. Find the complex formed
Answer:K3[AlF6]
11
Which is the correct order of decreasing acidity of lewis acids?
Answer:BBr3 > BCl3 > BF3
14
One mole of magnesium nitride on the reaction with an excess of water gives:
Answer:two moles of ammonia
15
The brown ring test for nitrates depends on
Answer:the reduction of nitrate to nitric oxide
16
In which of the following arrangements, the sequence is not strictly according to the property written against it?
Answer:NH3 < PH3 < AsH3 < SbH3 : Increasing basic strength
17
The reaction of P4 with X leads selectively to P4O6. The X is
Answer:A mixture of O2 and N2
20
In which of the following compounds, nitrogen exhibits highest oxidation state?
Answer:N3H
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