Which of the following electron configuration is NOT possible? 29. Water is: (a)

Question

Which of the following electron configuration is NOT possible? 29. Water is: (a) a polar compound (b) an ionic compound (c) a non--polar compound (d) a coordinate covalent compound (e) linear in shape 30. If enthaply change for a certain process is -32 kj/mol the process is (a) exothemic and heat will be absorbed (b) exothermic and heat will be released (c) endothermic and heat will be absorbed (d) endothemic and heat will be released (e) no heat will be absorbed or released 31. Using the following data, determine the heat of combustion of 1 mole of ethylene, C_2H_4. CaH_a(g) + 3 O_2(g) rightarrow 2 CO_2(g) + 2H_2O(I) (a) 1306.5 KJ (b) -1411.1 kj (c) -1306.6 kJ (d) 1411.1 kJ (e) -731.47 kJ 32. Which of the following sets of quantum numbers is not permissible? 33. What volume of alcohol (density 0.800 a/ml) is needed to obtain 64 g of alcohol? (a) 100 ml (b) 320 ml (c) 400 ml (d) 256 ml (e) 80 ml 34. Which of the following orbital diagrams is impossible according to the Pauli exclusion principle? 35. Which of the following compounds contains both ionic and covalent bonds? (a) NO_2 (b) KNO_3 (c) HF (d) BF_3 (e) SnCI_4 36. According to the building-up () principle, which of the following orbital's will be filled first? (a) 5p (b) 5d (c) 5s (d) 4d (e) 4t

Explanation / Answer

28 (C) is the right answer. 3S3 is not possible. 3S orbital can only keep 2 electrons.

29 (A) is the right answer. water is a polar compound and it has covalent bond.

30 (B) is the right answer . exothermic reaction gives out heat and Hp<Hr. here Hp is the enthalpy of product and Hr is enthalpy of reactant.so change in enthalpy is negative.

33 (E) is the right answer. D=W/V

0.8=64/V

V=80ml.

33

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