7. THE P-BLOCK ELEMENTS Objective
7. THE P-BLOCK ELEMENTS
Download 1. Boron shows diagonal relation with
(A) Al
(B) C
(C) Si
(D) Sn
Answer тЗТ (C)
2. Catenation property is maximum in
(A) phosphorus
(B) carbon
(C) sulphur
(D) zinc
Answer тЗТ (B)
3. Which one of the following is an electrophilic reagent ?
(A) BF3
(B) NH3
(C) H2O
(D) None of these
Answer тЗТ (A)
4. Element found from sea water is
(A) Magnesium
(B) Sodium
(C) Iodine
(D) None of these
Answer тЗТ (C)
5. The shape of XeF 4 is
(A) tetrahedral
(B) square planar
(C) pyramidal
(D) linear
Answer тЗТ (B)
6. Which one of the following is the strongest lewis acid ?
(A) BF3
(B) BC13
(C) BBr3
(D) BI3
Answer тЗТ (B)
7. Which one of the following does not form hydrogen bonding ?
(A) NH3
(B) H2O
(C) HCl
(D) HF
Answer тЗТ (C)
8. Main source of helium is
(A) Air
(B) Radium
(C) Monazite
(D) Water
Answer тЗТ (C)
9. Which one of the following element is liquid at normal temperature ?
(A) zinc
(B) mercury
(C) bromine
(D) water
Answer тЗТ (B)
10. Which one of the following is least basic ?
(A) NCl3
(B) NBr3
(C) NI3
(D) NF3
Answer тЗТ (C)
11. H2SO4 is a/an
(A) acid
(B) base
(C) alkali
(D) salt
Answer тЗТ (A)
12. Modern periodic table is given by
(A) Debonair
(B) Mendeleef
(C) Mendel
(D) None of these
Answer тЗТ (B)
13. Which one of the following elements is found in free state in nature ?
(A) Sodium
(B) Iron
(C) Zinc
(D) Gold
Answer тЗТ (D)
14. Which of the following is the strongest oxidising agent ?
(A) F2
(B) Cl2
(C) I2
(D) Br2
Answer тЗТ (A)
15. Which of the following has maximum ionisation potential ?
(A) Al
(B) P
(C) Si
(D) Mg
Answer тЗТ (B)
16. The number of P-O-P bonds in cyclic metaphosphoric acid is
(A) 2
(B) O
(C) 3
(D) 4
Answer тЗТ (A)
17. Which of the following oxides is anhydride of nitrous acid ?
(A) N2O3
(B) NO2
(C) NO
(D) N2O4
Answer тЗТ (A)
18. Which oxide of nitrogen is obtained on heating ammonium nitrate at 250┬░C ?
(A) Nitric oxide
(B) Nitrous oxide
(C) Nitrogen dioxide
(D) Dinitrogen tetraoxide
Answer тЗТ (B)
19. Atomicity of phosphorus is
(A) 1
(B) 2
(C) 3
(D) 4
Answer тЗТ (D)
20. The structure of white phosphorus is
(A) square-planar
(B) pyramidal
(C) tetrahedral
(D) trigonal planar
Answer тЗТ (C)
21. How many P-O-P bonds appear in cyclic meta phosphoric acid ?
(A) 4
(B) 3
(C) 2
(D) 1
Answer тЗТ (B)
22. Which of the following is a tetrabasic acid ?
(A) Hypophosphorus acid
(B) Metaphosphoric acid
(C) Pyrophosphoric acid
(D) Orthophosphoric acid
Answer тЗТ (C)
23. Which of the following is not correctly matched ?
(A) PCl5-sp3d hybridisation
(B) PCl3-sp3 hybridisation
(C) PCl5 (solid)-[PtCl4]+ [PtC6l-
(D) H3PO3-tribasic
Answer тЗТ (D)
24. Arrange the following hydrides of group 16 elements in order of increasing stability
(A) H2S < H2O < H2 Te > H2 Se
(B) H2O < H2Te < H2Se < H2S
(C) H2O < H2S < H2Se < H2Te
(D) H2Te < H2Se < H2S < H2O
Answer тЗТ (D)
25. Which of the following is not tetrahedral in shape ?
(A) NH4
(B) SiCl4
(C) SF4
(D) SO
Answer тЗТ (C)
26. Which of the following are peroxiacids of sulphur ?
(A) H2SO5 and H2S2O8
(B) H2SO5 and H2S2O7
(C) H2S2O7 and H2S2O8
(D) H2S2O6 and H2S2O8
Answer тЗТ (A)
27. In solid state PCl5 is a
(A) covalent solid
(B) octahedral structure
(C) ionic solid with [PCl6l+ octahedral and [PCl4]– tetrahedral
(D) ionic solid with [PCl4]+ tetrahedral and [PCl6]– octahedral
Answer тЗТ (D)
28. Which of the following is an isoelectronic pair ?
(A) ICI2, CIO2
(B) Br2–, BrF2+
(C) CIO2, BrF
(D) CN–, O3
Answer тЗТ (B)
29. Which of the following is Tribasic ?
(A) H3PO2
(B) H3PO3
(C) H4P2O7
(D) H3PO4
Answer тЗТ (D)
30. In white phosphorus (P4) molecule, which one is not correct ?
(A) 6 P-P single bonds are present
(B) 4 P-P single bonds are present
(C) 4 lone pair of electrons are present
(D) 
bond angle is 60┬░
Answer тЗТ (C)
31. Which is not a p-block elements ?
(A) Sn
(B) Al
(C) Mg
(D) Pb
Answer тЗТ (C)
32. H2SO2 is a/an
(A) acid
(B) base
(C) alkali
(D) all
Answer тЗТ (A)
33. What is the oxidation state of sulphur is SF6 ?
(A) +6
(B) -6
(C) +4
(D) -4
Answer тЗТ (A)
34. The geometry of PCl5 is
(A) Trigonal bipiramidal
(B) Octahedral
(C) Tetrahedral
(D) None
Answer тЗТ (A)
35. The shape of a XeF2 is
(A) Linear
(B) Triangular
(C) Angular
(D) Planar
Answer тЗТ (A)
Class 12th Chemistry Objective Question English
| S.N | CHEMISTRY OBJECTIVE English Medium |
| 1 | SOLID STATE┬а |
| 2 | SOLUTION |
| 3 | ELECTROCHEMISTRY |
| 4 | CHEMICAL KINETICS |
| 5 | SURFACE CHEMISTRY |
| 6 | GENERAL PRINCIPLES & PROCESSES OF ISOLATION OF ELEMENTS |
| 7 | THE P-BLOCK ELEMENTS |
| 8 | THE D- AND f-BLOCK ELEMENTS |
| 9 | CO-ORDINATION COMPOUNDS |
| 10 | HALOALKANES AND HALOARENES |
| 11 | ALCOHOLS, PHENOLS AND ETHERS |
| 12 | ALDEHYDES, KETONES AND CARBOXYLIC ACIDS |
| 13 | AMINES |
| 14 | BIOMOLECULES |
| 15 | POLYMERS |
| 16 | CHEMISTRY IN EVERYDAY LIFE |
