Q: Match List - I with List - II array llll & List-I & & List-II \ . & XeO _3 & I. & sp ^3 ~d , linear \ . & XeF _2 & II. & sp ^3 ; pyramidal \ . & XeOF _4 & III. & sp ^3 ~d ^3 ; distorted octahedral \ .

array ll XeO _3 & sp ^3(1 LP )- Pyramidal \\ XeF _2 & sp ^3 ~d (3 LP ) - Linear \\ XeOF _4 & sp ^3 ~d ^2(1 LP ) - Square pyramidal \\ XeF _6 & sp ^3 ~d ^3(1 LP ) - Distorted octahedral array

Question 1

Identify the incorrect statement from the following :

Accepted Answer

Nitrogen and oxygen both belong to the second period of the periodic table. The valence shell electronic configuration of nitrogen is 2s^ 2 2p^ 3 and that of oxygen is 2s^ 2 2p^ 4 . Since the principal quantum number is n=2 for both elements, they do not have vacant d-orbitals in their valence shells. Therefore, nitrogen cannot form d -p bonds with oxygen. They can only form p -p multiple bonds. Statement (1) is correct as nitrogen forms p -p multiple bonds with itself (e.g., in N_ 2 ). Statemen

Question 2

Given below are two statements: Statement-I : Heating NaCl with concentrated H_2SO_4 and MnO_2 results in oxidation of Mn. Statement-II : Heating NaI with concentrated H_2SO_4 and MnO_2 results in red

Accepted Answer

The reaction of NaCl with concentrated H _2 SO _4 and MnO _2 is given by: 2 NaCl + MnO _2 + 2 H _2 SO _4 Na _2 SO _4 + MnSO _4 + 2 H _2 O + Cl _2 In this reaction, the oxidation state of Mn changes from +4 in MnO _2 to +2 in MnSO _4. Since the oxidation state decreases, Mn undergoes reduction, not oxidation. Thus, Statement-I is incorrect. The reaction of NaI with concentrated H _2 SO _4 and MnO _2 is given by: 2 NaI + MnO _2 + 2 H _2 SO _4 Na _2 SO _4 + MnSO _4 + 2 H _2 O + I _2 Here, the oxida

Question 3

Given below are two statements: Statement I : Like nitrogen that can form ammonia, arsenic can form arsine. Statement II : Antimony cannot form antimony pentoxide. In the light of the above statements

Accepted Answer

N = NH _3 As AsH _3 are possible correct statement. All elements of N -family form two type of E _2 O _3 & E _2 O _5 oxide. Statement is wrong. Statement-I is correct & Statement-II is incorrect.

Question 4

Match List - I with List - II array llll & List-I & & List-II \ . & XeO _3 & I. & sp ^3 ~d , linear \ . & XeF _2 & II. & sp ^3 ; pyramidal \ . & XeOF _4 & III. & sp ^3 ~d ^3 ; distorted octahedral \ .

Accepted Answer

array ll XeO _3 & sp ^3(1 LP )- Pyramidal \ XeF _2 & sp ^3 ~d (3 LP ) - Linear \ XeOF _4 & sp ^3 ~d ^2(1 LP ) - Square pyramidal \ XeF _6 & sp ^3 ~d ^3(1 LP ) - Distorted octahedral array

Question 5

Among Group 16 elements, which one does NOT show -2 oxidation state?

Accepted Answer

Oxygen shows -2,-1,+1 and +2 oxidation states Selenium shows -2,+2,+4 and +6 oxidation states Tellurium shows -2,+2,+4 and +6 oxidation states Polonium shows +2 and +4 oxidation states

Question 6

Identify the incorrect statement.

Accepted Answer

- PEt _3 and AsPh _3 as ligands can form d - d bond with transition metals. - The N - N single bond is weaker than the single P - P bond because of high inter-electronic repulsion of the non-bonding electrons. - Nitrogen has unique ability to form p -p multiple bonds with itself, carbon and oxygen. - Nitrogen cannot form d - p bond as other heavier elements of its group.

Question 7

The products A and B obtained in the following reactions, respectively, are aligned & 3 ROH + PCl _3 3 RCl + A \ & ROH + PCl _5 RCl + HCl + B aligned

Accepted Answer

These reactions are preparation of haloalkanes from alcohols. 3 ROH + PCl _3 3 RCl + H _3 PO _3 ROH + PCl _5 RCl + HCl + POCl _3 A and B are H _3 PO _3 and POCl _3 respectively.

Question 8

Given below are two statements: Statement I: The boiling point of hydrides of Group 16 elements follow the order H _2 O H _2 Te H _2 Se H _2 ~S . Statement II: On the basis of molecular mass, H _2 O i

Accepted Answer

Statement I is correct, because boiling point of hydrides of group 16 follows the order H _2 O H _2 Te H _2 Se H _2 ~S . Statement II due to intermolecular H -bonding H _2 O shows higher boiling point than respective hydrides of group 16. (Both Statement are true) Order from H _2 Te to H _2 ~S is due to decreasing molar mass.

Question 9

Identify the incorrect statement from the following:

Accepted Answer

The acidic strength of HX follows the order HF HCl HBr HI This is because bond enthalpy of hydrides of group 17 decreases down the group.

p Block Elements (Group 15, 16, 17 & 18) — Previous Year Questions & Solutions