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MCQ on The P Block Elements for Class 11 With Answers | The P Block Elements MCQs

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Free download in PDF Class 11 Chemistry Chapter 11 The P Block Elements Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. These short solved questions or quizzes are provided by Gkseries./p>

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(1) Identify the correct resonance structures of carbon dioxide from the ones given below :
[A] O – C ≡ O
[B] O = C = O
[C] –O ≡ C – O+
[D] –O – C ≡ O+
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.

[A] Both A and R are correct and R is the correct explanation of A.
[B] Both A and R are correct but R is not the correct explanation of A.
[C] Both A and R are not correct
[D] A is not correct but R is correct.
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.

[A] A and R both are correct and R is the correct explanation of A.
[B] Both A and R are correct but R is not the correct explanation of A.
[C] A and R both are not true.
[D] A is not true but R is true.
Answer: Both A and R are correct but R is not the correct explanation of A.
(4) P4O10 has ______ bridging O atoms
[A] 4
[B] 5
[C] 6
[D] 2
Answer: 6
(5) Which of the statement is incorrect for XeO4 ?
[A] four p𝜋-d𝜋 bonds are present
[B] four sp3 – p 𝜎 bonds are present
[C] It has a tetrahedral shape
[D] It has a square planar shape
Answer: It has a square planar shape
(6) Which of the species has a permanent dipole moment?
[A] SF4
[B] SiF4
[C] BF3
[D] XeF4
Answer: SF4
(7) Oxygen is not released on heating which of the compounds?
[A] (NH4)2Cr2O7
[B] K2Cr2O7
[C] Zn(ClO3)2
[D] KClO3
Answer: (NH4)2Cr2O7
(8) Which is the correct order of decreasing bond dissociation enthalpy?
[A] F2 > Cl2 > Br2 > I2
[B] I2 > Br2 > Cl2 > F2
[C] Cl2 > Br2 > F2 > I2
[D] Br2 > I2 > F2 > Cl2
Answer: Cl2 > Br2 > F2 > I2
(9) S-S bond is present in which of the ion pairs
[A] S2O72-, S2O32-
[B] S4O62-, S2O72-
[C] S2O72-, S2O82-
[D] S4O62-, S2O32-
Answer: S4O62-, S2O32-
(10) In the presence of KF, AlF3 is soluble in HF. Find the complex formed
[A] K3[AlF6]
[B] AlH3
[C] K[AlF3H]
[D] K3[AlF3H3]
Answer: K3[AlF6]
(11) Which is the correct order of decreasing acidity of lewis acids?
[A] BBr3 > BCl3 > BF3
[B] BF3 > BCl3 > BBr3
[C] BCl3 > BF3 > BBr3
[D] BBr3 > BF3 > BCl3
Answer: BBr3 > BCl3 > BF3
(12) Graphite has a structural similarity with
[A] B2H6
[B] B4C
[C] B
[D] BN
Answer: BN
(13) Find the amphoteric oxide
[A] CaO2
[B] CO2
[C] SnO2
[D] SiO2
Answer: SnO2
(14) One mole of magnesium nitride on the reaction with an excess of water gives:
[A] one mole of ammonia
[B] one mole of nitric acid
[C] two moles of ammonia
[D] two moles of nitric acid
Answer: two moles of ammonia
(15) The brown ring test for nitrates depends on
[A] reduction of ferrous sulphate to iron
[B] oxidation of nitric oxide to nitrogen dioxide
[C] the reduction of nitrate to nitric oxide
[D] oxidising action of sulphuric acid
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?
[A] CO2 < SiO2 < SnO2 < PbO2 : Increasing oxidizing power
[B] HF < HCl < HBr < HI : Increasing acid strength
[C] NH3 < PH3 < AsH3 < SbH3 : Increasing basic strength
[D] B < C < O < N : Increasing first ionization enthalpy
Answer: NH3 < PH3 < AsH3 < SbH3 : Increasing basic strength
(17) The reaction of P4 with X leads selectively to P4O6. The X is
[A] Dry O2
[B] A mixture of O2 and N2
[C] Moist O2
[D] O2 in the presence of aqueous NaOH
Answer: A mixture of O2 and N2
(18) Which noble gas is most abundant in atmosphere?
[A] He
[B] Ne
[C] Ar
[D] Kr
Answer: Ar
(19) Which of the following contains P - O - P bond?
[A] Hypophosphorous acid
[B] Phosphorous acid
[C] Pyrophosphoric acid
[D] Orthophosphoric acid
Answer: Pyrophosphoric acid
(20) In which of the following compounds, nitrogen exhibits highest oxidation state?
[A] N3H
[B] NH2OH
[C] N2H4
[D] NH3
Answer: N3H

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