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Q.No.21. Which one of the following hexoses will give an osazone that has a different melting point from that of the osazone obtained from D (+) glucose? D-galactose (option C) […]

Q20. In the reaction given below, choose the condition that gives an anti-Markovnikov’s product. (A)  Peroxide / HCI (B) Aqueous mercuric acetate treatment (C) Diborane addition (D) Sulfuric acid addition […]

Q.NO. 19 Given below are Newman projections of ethylene glycol and 1,2-difluoroethane about their respective C-C bonds. The most stable conformations (lowest energy) of ethylene glycol and 1,2-difluoroethane are (A) […]

Q. No 18. Which one of the following statements is incorrect about the diborane molecule? (A) B−Ht bond is a two-center two-electron bond (Ht = terminal hydrogen). (B) B−Hb bond is […]

QN.17 Based on the molecular orbital theory, which of the following statements with respect to N₂, O₂ and O₂⁺ is correct? (a) Bond order of N₂⁺ is higher than that […]

Q.No. 16 The correct order of first ionization energies of He, N and O in their ground state is (A) He > O > N (B) O > N > […]

Q15. The standard enthalpy of reaction (in kJ mol-1) for obtaining three moles of H2(g) from atomic hydrogen in gas phase is ______. Given: Standard enthalpy of formation of atomic […]

Q.NO. 14 The azimuthal quantum number (l) of an electron in the dz2 orbital of a copper atom (atomic number: 29) is _______. The azimuthal quantum number (l) for an […]

Q. No. 13 In naphthalene, the value of the integer “n” according to Hückel’s rule of aromaticity is ______. The integer “n” in Hückel’s rule for naphthalene is 2. Naphthalene, […]

Q.No.12 The coordination complex which has a distorted octahedral structure is (Given: Atomic numbers V: 23, Mn: 25, Ni: 28, Cu: 29) (a) [Ni(H2O)6]2+ (b) [Mn(H2O)6]2+ (c) [V(H2O)6]2+ (d) [Cu(H2O)6]2+ […]