013JECTIVF NOTE: All the questions am to be attempted. Write your Roll No before attempting the paper in the space. provided for this purpose. Answers are to be given on this very sheet. (Cutting , Over-writing , using lead pencil . rubber or ink-remover will result into loss of marks)
1. Poor possible answers are given to each statement. This mark ( the correct one 17 (i) Dempster's mass spectrometer was dmigned for the identification of isotopes of the elements which were available in (a) Gaseous state (b) liquid state (e) solid state (d) plasma state
Ili) Repeated extraction using small portions of solvent am more (a) accurate (b) efficient (Cl slow (d) Rapid
(iii) The Chromatography in which stationary phase is liquid is called (a) Partition Chromatography (b) Column Chromatography (c) Adsorption Chmrnatogrphy (d) All of these
(iv) Plasmas are found in everything from the sun to (a) atoms (b) molecules (c) electrons td) quarks
(v) Partial pressure of OxYgen in the lungs is (a) 159 tort (b) 136 torn (c) 116 turn (4)110 tow
(vi) How much more space is occupied by Wilier WI /Wang (n) 9% (b) 8 % (c) 7% (d)6%
(vii) When 10 % Urea is present in NaCI solution then wall crystal becomes (a) Rod like (b) sphere like (c) Needle Ilkc (d) egg like
(viii) Which one of the following sores lie in ultra-violet region (a) Lyman (b) Balmer (c) Paschen (el) Brackett
(ix) The shape of ' p ' orbitals is (a) t)oubleAumb-hell (b) Spherical (c)dumb-bell (dl complicated
(x) The elements having low ionization energy are (a) non-metals (b) metals (c) semi-metal Id) metalloids
(xi) Which of the following is not isoelectronic with rest of the three (a) K. (b) Na (c) Cf (d) S.2 (xii) Born-Haber cycle is used to determine the (a) Combustion energy (b) Decomposition energy (c) Lattice energy (d) Formation energy
(xiii) In which of the following reactions Kc and Kp will be oqual ter) PCI5 r PCI3 Cl2 (b) N2 * 3112 6 2NH3 (c)2S02 02 •r•—•s• 2S03 (d) N2 s 027,----•" 2N0
(xis) When HCI is passed in saturated solution of NaCI . the solubility of NaCI is (a) increased (b) decreased (c) not affected (d) None of all
(xv) The critical solution temperature of phenol-water system is (0)35.6 (b) 49.5 °C (c) 57.8 °C (d) 65.9 °C
(xvi) Which one of the following cells is used for the extraction of Na metal (a) Nelson's cell (b) Galvanic cell (c) Down's cell (d) All of these cells (evil)
The energy of activation by using catalyst for a reaction is (a) increased (b) decreased (c) not changed (d) moderate
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