1. The volume strength of 1.5 N H2O2 solution is (a) 4.8 (b) 8.4 (c) 3.0 (d) 8.0 2. If the concentration of glucose (C6H12O6) in blood is 0.9 g L–1, what will be the molarity of glucose in blood? (a) 5 M (b) 50 M (c) 0.005 M (d) 0.5 M 3. The ozone in the stratosphere is destroyed by (a) Cl (b) OH (c) H (d) ClO 4. If o < P, the correct electronic configuration for d 4 system will be (a) t32g e1g (b) t42g e0g (c) t02g e4g (d) t22g e2g 5. Wavelength of high energy transition of H-atom is 91.2 nm. The corresponding wavelength of He+ is (a) 91.2 nm (b) 22.8 nm (c) 54.5 nm (d) 45.6 nm 6. Shape of O2F2 is similar to that of (a) C2F2 (b) H2O2 (c) H2F2
(d) C2H2
7. Formation of polyethylene from calcium carbide takes place as follows : CaC2 + 2H2O Ca(OH)2 + C2H2 C2H2 + H2 C2H4 ( CH2 CH2 )n nC2H4 The amount of polyethylene obtained from 64.0 kg of CaC2 is (a) 7 kg (b) 14 kg (c) 21 kg (d) 28 kg
(R) (S) (a) (c)
K[Co(NH3)2(NO2)4] [Cr(NH3)3(NO2)3] P>Q>R>S (b) P > R > Q > S Q>P>R>S (d) S > R > P > Q
10. If heavy water is taken as solvent instead of normal water while performing Cannizzaro reaction, the products of the reaction are (a) RCOO– and RCH2OH (b) RCOO– and RCH2OD (c) RCOOD and RCD2OD (d) RCOO– and RCD2OD 11. The correct IUPAC name of the following alkene is (a) (b) (c) (d)
Z-3-methyl-4-propyl-3-octene E-3-methyl-4-propyl-3-octene E-4-butyl-3-methyl-3-heptene E-2-ethyl-3-propyl-2-heptene.
12. Select the process that represents smelting. 2Al(OH)3 (a) Al2O3 + 3H2O (b) ZnCO3
(c) Fe2O3 + 3C (d) 2Pb + O2
ZnO + CO2
2Fe + 3CO 2PbO
8. When ammoniacal solution of MgSO4 is heated with Na2HPO4 in presence of NH4Cl, a white precipitate of ______ is formed. (a) Mg(NH4)PO4 (b) Mg3(PO3)2 (c) MgSO4 . MgCl2 (d) MgSO4 . Mg3(PO4)2
13. An energy of 24.6 eV is required to remove one of the electrons from a helium atom. The total energy required to remove both the electrons from helium atom is (a) 38.2 eV (b) 49.2 eV (c) 51.8 eV (d) 79.0 eV
9. Arrange the following complexes in the order of decreasing molar conductivity : (P) Mg[Cr(NH3)(NO2)5] (Q) [Cr(NH3)5(NO2)]3[Co(NO2)6]2
14. A first order reaction is 15% completed in 20 minutes. How long will it take to complete 60% ? (a) 123.3 minutes (b) 112.7 minutes (c) 145.2 minutes (d) 138.8 minutes
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CHEMISTRY TODAY | APRIL ‘17