P Block Elements Class 12 MCQ. We covered all the P Block Elements Class 12 MCQ in this post for free so that you can practice well for the exam.
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MCQ on P Block Elements for NEET Students
Assertion: The negative electron gain enthalpy of fluorine is less than that of chlorine. Reason: The electronegativity of fluorine is higher than that of chlorine.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, and the Reason is true.
Option b – Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
The number of P-O and P-O bonds in cyclotrimetaphosphoric acid are ………. respectively.
(A) 3 and 6
(B) 3 and 9
(C) 6 and 9
(D) 3 and 12
Option b – 3 and 9
SO₂ can be prepared by following, EXCEPT ……..
(A) The action of conc. H₂SO4 on Cu
(B) Treating sodium sulphite with dil. HCI
(C) Roasting of iron(II) sulphide
(D) Boiling sulphur with milk of lime
Option d – Boiling sulphur with milk of lime
Among the following elements, …….. has the lowest boiling point, and ……… has the highest boiling point. Xe, Kr, Ne, and Ar
(A) Ar ; Xe
(B) Ne ; Xe
(C) Kr;Xe
(D) Ne ; Kr
Option b – Ne ; Xe
The products formed when lead nitrate is heated at around 673 K are ……..
(A) lead(II) oxide, nitrogen dioxide and oxygen
(B) lead(IV) oxide, nitrogen dioxide and oxygen
(C) lead(II) oxide, nitrogen monoxide and oxygen
(D) lead(II) oxide, dinitrogen oxide and oxygen
Option a – lead(II) oxide, nitrogen dioxide and oxygen
Assuming 100% conversion, the number of moles of ozone required to completely oxidize one mole of lead(II) sulphide is …….
(A) 1
(B) 2
(C) 3
(D) 4
Option d – 4
Which of the following is/are CORRECT? (I) The first ionization enthalpy of group 14 elements is lower than the corresponding elements of group 13. (II) The melting points and boiling points of group 14 elements are much higher than those of the corresponding elements of group 13. (III) The electronegativity of group 14 elements is slightly higher than the corresponding elements of group 13.
(A) Only (I)
(B) Only (II)
(C) (I) and (III)
(D) (II) and (III)
Option d – (II) and (III)
Which one of the following properties is shown by N₂O?
(A) It is a basic oxide.
(B) It is a neutral oxide.
(C) It is a brown gas.
(D) It is a blue solid.
Option b – It is a neutral oxide.
At 573 K, chlorine reacts with excess fluorine to give an interhalogen ‘Z’. The molecular structure of this compound ‘Z’ is ……….
(A) bent T-shape
(B) pentagonal bipyramidal
(C) square pyramidal
(D) linear
Option a – bent T-shape
Select the CORRECT option.
(A) H₂S is more acidic than H₂Se.
(B) H₂Te is more acidic than H₂O.
(C) PH3 is more basic than NH3.
(D) SbH3 is more basic than AsH3.
Option b – H₂Te is more acidic than H₂O.
Assertion: H₂PO2 acts as a reducing agent while H3PO4 does not. Reason: H3PO₂ contains one P-OH bond while H3PO4 contains three P-OH bonds.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option b – Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
Which statement is INCORRECT about fullerene C60?
(A) It contains 12 six-membered rings and 20 five-membered rings.
(B) All carbon atoms undergo sp² hybridization.
(C) A six-membered ring is fused with either a five-membered or six-membered ring.
(D) A five-membered ring is fused with a six-membered ring only.
Option a – It contains 12 six-membered rings and 20 five-membered rings
Peroxide linkage is present in ……….
(A) H₂S₂O7
(B) H₂S2O8
(C) H₂S₂O6
(D) H₂S₂O5
Option b – H₂S2O8
Statement (1): The two oxygen-oxygen bond lengths in the O3 molecule are identical. Statement (2): The oxygen-oxygen bond length in 03 molecules is equal to that of the oxygen-oxygen bond length in O₂ molecule. Select the most appropriate option.
(A) Both statements are correct.
(B) Both statements are incorrect.
(C) Statement (1) is correct but statement (2) is incorrect.
(D) Statement (1) is incorrect but statement (2) is correct.
Option c – Statement (1) is correct but statement (2) is incorrect.
Bismuth combines with magnesium to form magnesium bismuthide, in which the oxidation state of bismuth is …….
(A) +2
(B) +3
(C) -2
(D) -3
Option d – -3
Which of the following is CORRECT for white phosphorus?
(A) It is non-poisonous.
(B) It shows chemiluminescence.
(C) It is insoluble in water and carbon disulphide.
(D) It is the thermodynamically most stable form of phosphorus.
Option b – It shows chemiluminescence.
The number of P – O – P and P-O-H bonds present respectively in the pyrophosphoric acid molecules are ………
(A) 1,2
(B) 2,2
(C) 1,4
(D) 1,8
Option c – 1,4
Identify the elements that form amphoteric oxide.
(A) Magnesium, potassium
(B) Zinc, aluminium
(C) Calcium, sodium
(D) Sulphur, boron
Option b – Zinc, aluminium
Identify X and Z in the following reactions. Z+3LiAlH4 →X +3LiF + 3AlF3 X + 6H₂O → 2H3BO3 + 6H₂
(A) X=B₂H6, Z = BF3
(B) X = BF3, Z=HF
(C) X=B₂H6, Z = HF
(D) X = B₂H6, Z = NaF
Option a – X=B₂H6, Z = BF3
Chlorine reacts with cold and dilutes sodium hydroxide solution to form ………
(A) NaCl, NaOCI and H₂O
(B) NaCl, NaOC13 and H₂O
(C) NaOCI and H₂O
(D) NaCl, HCl and H₂O
Option a – NaCl, NaOCI and H₂O
The oxoacid of sulphur in which sulphur has the lowest oxidation state is ………
(A) sulphurous acid
(B) dithionic acid
(C) sulphuric acid
(D) dithionous acid
Option d – dithionous acid
In solid-state, phosphorus(V) chloride exists in ionic form with cation X and anion Y. The shape of ion X is ……….
(A) octahedral
(B) trigonal planar
(C) square planar
(D) tetrahedral
Option d – tetrahedral
Compound ‘A’ is an oxyacid of nitrogen. It is prepared in the laboratory by heating potassium nitrate with concentrated sulphuric acid in a glass retort. Identify ‘A’.
(A) Nitric oxide
(B) Nitrous acid
(C) Nitric acid
(D) Hyponitrous acid
Option c – Nitric acid
In which of the following interhalogen compounds, the central atom undergoes the same hybridization as that of the sulphur atom in the SF4 molecule?
(A) BrF3
(B) IF7
(C) BrF5
(D) IF5
Option a – BrF3
The reaction of copper with dilute nitric acid produces …….
(A) NO₂
(B) NO
(C) N₂O
(D) N₂
Option b – NO
Gas ‘A’ is manufactured by Deacon’s process. Identify the INCORRECT statement regarding ‘A’.
(A) It is soluble in water.
(B) It is a colourless gas with a pungent and suffocating odour.
(C) It is used for bleaching wood pulp.
(D) It oxidizes hydrogen sulphide to sulphur.
Option b – It is a colourless gas with a pungent and suffocating odour.
Identify the INCORRECT statement.
(A) A tridymite is a crystalline form of silica.
(B) Carbonic acid is a weak monobasic acid.
(C) Graphite is thermodynamically the most stable allotrope of carbon.
(D) Diamond is a crystalline form of carbon.
Option b – Carbonic acid is a weak monobasic acid.
Which of the following has two P – OH, two PH and two P = O bonds?
(A) H₂PO₂
(B) H3PO3
(C) H4P₂O5
(D) H4P₂O6
Option c – H4P₂O5
Among the following, ………. is thermally least stable.
(A) HI
(B) HBr
(C) HCI
(D) HF
Option a – HI
Phosphine + Mercuric chloride →? The products are ……..
(A) P4, Hg and HCI
(B) Hg3P₂ and HCI
(C) PCl3 and Hg₂Cl₂
(D) Hg and PH4Cl
Option b – Hg3P₂ and HCI
Which of the following is the CORRECT statement? ( P Block Elements Class 12 MCQ )
(A) Molecular oxygen (O₂) is diamagnetic while other members of group 16 are paramagnetic.
(B) Water is liquid at room temperature whereas hydrides of another group of 16 elements are solids.
(C) Fluorine forms only one oxoacid whereas other halogens form a number of oxoacids.
(D) Hydrogen fluoride is gas at room temperature whereas hydrides of another group of 17 elements are liquids.
Option c – Fluorine forms only one oxoacid whereas other halogens form a number of oxoacids.
Assertion: If aluminium atoms replace a few silicon atoms in a three-dimensional network of silicon dioxide, the overall structure acquires a positive charge. Reason: Aluminium is trivalent while silicon is tetravalent.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option d – The assertion is false, Reason is true.
The shape of XeOF4 is ………. ( P Block Elements Class 12 MCQ for NEET )
(A) square pyramidal
(B) trigonal bipyramidal
(C) octahedral
(D) square bipyramidal
Option a – square pyramidal
Of the following compounds, the least acidic is ………. ( P Block Elements Class 12 MCQ )
(A) As₂O3
(B) P₂O3
(C) Sb₂O3
(D) Bi₂03
Option d – Bi₂03
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