2.AIPMT question paper 2010 mains - AIPMT 2013

31. For vaporization of water at 1 atmosphericpressure, the values of ∆H and ∆S are--------=6 × 8.314 × 402= 41647.7 Pa16.05 × 0.03Ans:Sol: T =373.4 K3 −1∆H40.63 × 10 J mol=∆S−1−1108.8 J K mol= 373.4 K32. A 0.66 kg ball is moving with a speed of 100 m/s--------Ans:Sol: λ =1.0 × 10 −35 mhmv= 1 × 10 −35 m−346.6 × 10 Js=−10.66 kg×100 m s37. Which of the following expressions correctlyrepresents the equivalent --------Ans:Sol:1 031 02+ −λ32Aλ+ λSO40 ⎛ 0 ⎞ ⎛ 0 ⎞λ eq = ⎜ eq ⎟ + ⎜ eq ⎟λλ⎝ ⎠cation⎝ ⎠anion101−= λ3 + + λ02AλSO43238. How many bridging oxygen atoms are present--------Ans: 633. Three moles of an ideal gas expandedspontaneously into vacuum--------Sol:There are six bridging oxygen atoms inP 4O 10.Ans:Zero39. Among the following which one has the highest--------Sol:For free expansion the work done is zero.Ans:CsF34. The following two reactions are known:--------Ans:Sol:+6.2 kJEquation (1) − 2 × Equation (2) givesrequired equation.Hence −26.8 kJ − (2 × −16.5 kJ)= +6.2 kJ35. The reaction2A(g) + B(g) --------Ans: [(0.75) 3 (0.25)] ÷ [(0.50) 2 (0.75)]Sol: A( g) B( g)2 + 3C (g) + D (g)1 − 0.5 1 − 0.25 0.75 0.25[ ] 3C [ D ]K =2A B[ ] [ ]( ) 30.75 × ( 0.25 )=2( 0.5) × ( 0.75)36. The pressure exerted by 6.0 kg of methane gasin a 0.03 m 3 vessle--------Ans:Sol: P =41648 PanRTVSol: Cs + is the biggest cation and F − is thesmallest anion.40. Which of the following oxidation states is themost--------Ans: 3Sol:+3 is the most common oxidation state ofLanthanoids41. Some of the properties of the two species--------Ans:Dissimilar in hybridization for central atomwith different structures.Sol: NO 3 − is planar – sp 2H 3O + is pyramidal − sp 342. The compound A on heating gives a colourlessgas and residue that is --------Ans: CaCO 3Sol: CaCO 3 ⎯⎯→∆ CaO + CO 2(A) residue gasCaO ⎯⎯H 2⎯O → Ca(OH) 2(B)⎯CO ⎯→Ca(HCO 3) 2 ⎯⎯→∆ CaCO 3⎯ 2(C)(A)