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AHOWIedge ana understanding Duseu ucuEJHMI, Multiple Choice Questions, For each question given below, choose the correct alternative., II. Which of the following is the strongest oxidising agent?, (b) Cl2, (a) F2, (c) I2, (d) Br, 1. Nitric acid can be obtained from ammonia via the formation, of the intermediate compounds :, (a) nitric oxide and nitrogen dioxide, (b) nitrogen and nitric oxide, (c) nitric oxide and dinitrogen pentoxide, (d) nitrogen and nitrous oxide, 2. Which has the highest electronegativity?, (a) Chlorine, (c) Oxygen, 3. Nitrogen does not form pentahalides because:, (a) absence of d-orbital, (b) its size is small, (c) high ionization energy, (d) high electronegativity., 4. Helium is used in balloons in place of hydrogen because it, 12. Which is the strongest acid?, (b) HNO,, (d) HCIO,, (a) HCI, (e) H,SO,, 13. Which of the following statements is not true?, (a) HOCI is a stronger acid than HOBR., (b) HF is a stronger acid than HCI., (c) Among halide ions, iodide is the most powerful reducing, (b) Fluorine, (d) Hydrogen, (d) Fluorine is the only halogen that does not show a, variable oxidation state., agent., 14. In the conversion of Br, to BrO, the oxidation number of, Br changes from:, (b) +1 to +5, (a) zero to +5, (d) +2 to +5., 15. In BrF, molecule, the lone pairs occupy equatorial positions, to minimize:, (a) lone pair-bond pair repulsion only, (b) bond pair-lone pair repulsion only, (c) lone pair-lone pair repulsion and lone pair-bond pair, repulsion, (d) lone pair-lone pair repulsion only., 16. Formula of tear gas is:, (a) COCI,, (c) N,0, is:, (c) zero to -3, (a) radioactive, (b) more abundant than hydrogen, (c) incombustible, (d) lighter than hydrogen., 5. Which of the following represents the Lewis, structure of, N, molecule?, (a): N N:, (b): N=N:, (d): N-N:, (e):N-N:, (b) CCl,NO,, 6. Hybridisation in XeF, is :, (a) sp'd, (c) dsp3, 7. Shape of water molecule is:, (a) linear, (d) none of these., 17. Which one of the following is expected to exhibit, paramagnetic behaviour?, (a) CO,, (c) SO2, 18. Which of the following molecules has trigonal planar, geometry?, (a) BF3, (c) PCI,, (b) sp'd, (d) sp'd, (b) SiO,, (b) bent, (d) CIO, (d) trigonal planar., (c) octahedral, 8. Oxalic acid when heated with conc. H,SO, gives:, (b) NH3, (a) H,O, and CO,, (c) H,O, and CO, 9. Which of the following is used in the preparation of chlorine? 19. Which of the following would have a permanent dipole, (b) CO, CO, and H,0, (d) CO, and H,S., (d) IF3, moment?, (a) Only MnO2, (b) Only KMNO4, (a) SiF, (c) XeF4, 20. Among the following molecules,, (i) XeF (ii) XeOF, (iii) XeF,, those having same number of lone pairs on Xe are :, (b) SF4, (d) BF3-, (c) Both MnO, and KMNO4, (d) Either MnO, or KMNO4., 10. Which of the following has same number of electrons in the, last shell?, (a) (i) and (ii) only, (b) (i) and (iii) only, (c) (i) and (ii) only (d) (i). (ii) and (iii)., (a) As and Bi, (b) Sb and Pb, (c) N and O, (d) Fe and Cr.

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DEEPAK CBSE Sample Paper Chemistry 12th, 21. Bond angle in XeO, is:, 24. Which one of the following is least covalent in nature?, (b) BiF;, (d) SbF3, (a) 107°, (b) 119, (d) 103., (a) NF3, (c) 92°, (c) PF,, 22. In which of the given molecules are all the bonds not cqual? 25 The hydrides of the first clements in groups 15-17, namely, (a) NF3, (c) BF,, (b) CIF, (d) AlF, NH,, H,O and HF respectively show abnormally high values, of melting and boiling points. This is due to:, 23. Tincture of iodine is:, (a) small size of N, O and F, (a) aqueous solution of I,, (b) solution of I, in aqueous KI, (b) the ability to form extensive intermolecular H-bonding, (c) the ability to form extensive intermolecular H-bonding, (c) aqueous solution of KI, (d) alcoholic solution of KI., (d) effective van der Waals interaction.