CBSE Class 12 Chemistry The p Block Elements MCQs Set E

Refer to CBSE Class 12 Chemistry The p Block Elements MCQs Set E provided below available for download in Pdf. The MCQ Questions for Class 12 Chemistry with answers are aligned as per the latest syllabus and exam pattern suggested by CBSE, NCERT and KVS. Chapter 7 The p Block Elements Class 12 MCQ are an important part of exams for Class 12 Chemistry and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 12 Chemistry and also download more latest study material for all subjects

MCQ for Class 12 Chemistry Chapter 7 The p Block Elements

Class 12 Chemistry students should refer to the following multiple-choice questions with answers for Chapter 7 The p Block Elements in Class 12.

Chapter 7 The p Block Elements MCQ Questions Class 12 Chemistry with Answers

Question: The element evolving two different gases on reaction with cone. sulphuric acid is 
(a) P
(b) C
(c) Hg
(d) S
(e) Sn
Answer: b

Question: The atomicity of phosphorus is X and the PPP bond angle in the molecule is Y. What are X and Y? 
(a) X = 4, Y = 90°
(b) X = 4, Y = 60°
(c) X = 3, Y = 120°
(d) X = 2, Y = 180°
Answer: b

Question: Which of the following is not a peroxy acid? 
(a) Perphosphoric acid
(b) Pernitric acid
(c) Perdisulphuric acid
(d) Perchloric acid
Answer: d

Question: Sodium pyrophosphate is represented by which of the following fonnula ? 
(a) Na2P2O4
(b) Na4P2O5
(c) Na4P2O7
(d) Na2P2O5
Answer: c

 Question: The catalyst used in the manufacture of anunonia is
(a) V2O5
(b) Pt 
(c) Fe
(d) Ni(CO)4
Answer: c

Question: Extrapure N2 canbeobtainedbyheating
(a) NH3 with CuO
(b) NH4NO3
(c) (NH4)2Cr2O7
(d) Ba(N3)2
Answer: d

Question: Concentrated mtr1c acid, upon long standing, turns yellow-brown due to the fonnation of 
(a) NO
(b) NO2
(c) N2O
(d) N2O4
Answer: b

Question: Pnicogens are the elements of group 
(a) 15
(b) 13
(c) 8
(d) zero
Answer: a

Question: In the electrothermal process, the compound displaced by silica from calcium phosphate is 
(a) calcium phosphide
(b) phosphine
(c) phosphorus
(d) phosphorus pentoxide
Answer: d

Question: Ammonia is dried over 
(a) slaked lime
(b) calcium chloride
(c) phosphorus pentoxide
(d) quicklime
Answer: d

Question: Which one of the following oxides of nitrogen dimerises into a colourless solid/liquid on cooling ? 
(a) N2O
(b) NO
(c) N2O3
(d) NO2
(e) N2O5
Answer: d

Question: Phosphorns pentoxide is widely used as 
(a) bleaching agent
(b) dehydrating agent
(c) oxidising agent
(d) reducing agent
Answer: b

Question: The molecule BF3 and NF3 both are covalent compounds, but BF3 is non-polar and NF3 is polar.
The reason is that
(a) boron is a metal and nitrogen is a gas in uncombined state
(b) BF3 bonds have no dipole moment whereas NF3 bond have dipole moment
(c) atomic size of boron is smaller than that of nitrogen 
(d) BF3 is symmetrical molecule whereas NF3 is unsymmetrical
Answer: d

Question: Soid PCl5 exists as 
(a) PCl+4
(b) PCI5
(c) PCl+4 and PCI6
(d) PCI6
Answer: c

Question: The reaction ofP4 with X leads selectively to P4O6 . The Xis
(a) dry O2
(b) a mixture of O2 and N2
(c) moist O2
(d) O2 in the presence of aqueous NaOH
Answer: b

Question: The statements that is not con-ect is 
(a) hypophosphorous acid reduces silver nitrate to silver
(b) in solid state PCI5 exists as [PCI4]+ [PCI6]
(c) pure phosphine is non-inflammable
(d) phosphorus acid on heating disproportionates to give metaphosphoric acid and phosphine
Answer: c

Question: The nitrite ion in represented by
I. [O-N=O]Θ II. [N=O-O]Θ
Which of the structures represents possible resonance fon-ns of this ion ? 
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I and I
Answer: a

Question: Which has the smallest size ?
(a) Na+
(b) Mg2+
(c) AI3+
(d) p5+
Answer: d

Question: The product formed in the reaction of SOCI2 with white phosphorus is 
(a) PCI3
(b) SO2Cl2
(c) SCl2
(d) POCI3
Answer: a 

Question: The reaction of white phosphorus with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product are respectively 
(a) redox reaction, – 3 and – 5
(b) redox reaction, 3 and + 5
(c) disproportionation reaction, – 3 and + 5
(d) disproportionation reaction, – 3 and + 3
Answer: c

Question: The least stable hydride of 15th group elements is
(a) NH3
(b) PH3
(c) AsH
(d) SbH3
(e) BiH3
Answer: e

Question: The most abundant element in the earth crust is 
(a) O
(b) Si
(c) H
(d) C
Answer: a

Question: Which of the following oxyacids of phosphorus is a reducing agent and monobasic ? 
(a) H3PO2
(b) H3PO3
(c) H3PO4
(d) H4P2O6
Answer: a

Question: Which of the following(s) when heated give nitrogen gas?
(a) (NH4)2 Cr2O7
(b) Ba(N3)2
(c) NH4NO3
(d) Both (a) and (b)
Answer: d

Question: If an allotropic form changes slowly to a stable form. It is called 
(a) enantiotropy
(b) dynamic allotropy
(c) monotropy
(d) None of these
Answer: c

Question: Which of the element of nitrogen family produce maximum number of oxyacids ? 
(a) N
(b) P
(c) As
(d) Sb
Answer: b

Question: As the number of – OH groups increases in hypophosphorus acid, phosphorus acid and phosphoric acid, the acidic strength 
(a) increases
(b) decreases
(c) remains nearly same
(d) remains appropriately same
Answer: c

Question: Pb reacts with dilute HNO3 gives 
(a) NO
(b) NH4NO3
(c) N2O5
(d) NO2
Answer: a

Question: The following are some statements related to VA group hydrides.
I. Reducing property increases from NH3 to BiH3.
II. Tendency to donate lone pair decreases from NH3 to BiH3.
III. Thermal stability of hydrides decreases from NH3 to BiH3.
IV. Bond angle of hydrides decreases form NH3 to BiH3.
The con-ect statements are
(a) I, II, III and IV
(b) I, III and IV
(c) I, II and IV
(d) I and IV
Answer: a

MCQs for Chapter 7 The p Block Elements Chemistry Class 12

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