1. The ligand with which the homoleptic octahedral complex of Co3+ will be most stable is: (a) Ethylenediamine tetra acetate ion (b) Dien (N-(2-aminoethyl)-1,2-ethanediamine) (c) Ethane-1,2-diamine (d) Ammonia
2. Which of the following properties may have positive values of ∆H? (i) Lattice enthalpy (ii) Hydration enthalpy (iii) Electron gain enthalpy for noble gases (iv) Ionisation enthalpy
(a) (i) and (ii) (b) (iii) and (iv) (c) Only (iv) (d) (ii), (iii) and (iv)
3. The correct IUPAC name of potassium permanganate is: (a) potassium tetraoxomanganate(VI) (b) potassium tetraoxidopermanganate(VII) (c) potassium tetraoxidomanganese(VII) (d) potassium tetraoxidomanganate(VII)
4. Which of the following statements is true with respect to sodium salts of oxoanions of phosphorus NaH2PO2 and Na2HPO3 (a) NaH2PO2 is reducing and Na2HPO3 is oxidizing (b) NaH2PO2 is more reducing than Na2HPO3 (c) NaH2PO2 is more oxidizing than Na2HPO3 (d) NaH2PO2 is oxidizing and Na2HPO3 is reducing
5. The fluoride/s of xenon, XeFn (n = 2 or 4 or 6), which on complete hydrolysis gives back xenon as one of the products, is/are_______. I. XeF2 II. XeF4 III. XeF6 (a) II only (b) I and II (c) III only (d) I, II and III
6. If an element after oganesson (Og, atomic number 118 and electronic configuration [Rn] 5f14 6d10 7s2 7p6) was discovered, in which of the following orbital, will the 119th electron be accommodated? (a) 7d (b) 6f (c) 8s (d) 5g
7. The number of ‘two-center-two electron’ and ‘three-center-two electron’ bonds in [Al(BH4)3] are respectively (a) twelve and zero (b) twelve and three (c) six and six (d) nine and three
8. Consider the following statements: (i) Calcination is carried out in absence of air below the melting point of the ore (ii) Roasting and calcination are carried out in presence of flux (iii) Calcination is carried out in limited supply of air above the melting point of the ore (iv) Roasting is carried out in air below the melting point of ore
The correct set of statements is (a) (i) and (iv) (b) (ii) and (iii) (c) (i), (iii) and (iv) (d) (iii) and (iv)
9. The correct statement about the solubilities of Group 2 hydroxides is: (a) The solubilities increase because lattice energy increases as we go down Group 2 (b) The solubilities increase because lattice energy decreases as we go down Group 2 (c) The solubilities decrease because atomic size increases as we go down Group 2 (d) The solubilities decrease because lattice energy decreases as we go down Group 2
10. The product obtained on reaction of optically pure 1-bromo-1-phenyl ethane with CH3OH, is: (a) phenyl ethene. (b) 1-methoxy-1-phenyl ethane with inverted configuration only. (c) 1-methoxy-1-phenyl ethane with retention of configuration. (d) a racemic mixture of 1-methoxy-1-phenyl ethane
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