1. Xtra Edge February 2012 - Career Point
1. Xtra Edge February 2012 - Career Point 1. Xtra Edge February 2012 - Career Point
XtraEdge for IIT-JEE 54 FEBRUARY 2012
7. NaOH can be prepared by two methods each of the method has two steps having 100% yield. Method I : 2Na + 2H2O → 2NaOH + H2 2H2 + O2 → 2H2O 1 Method II : 2Na + O2 → Na2O 2 Na2O + H2O → 2NaOH Which of the above method gives better yield of NaOH ? (A) Method I (B) Method II (C) Method I & Method II give equal yields. (D) Yield cannot be determined 8. Which of the following value θ is correspond to the maximum dipole moment of the triatomic molecule XY2 Y θ X (A) θ = 90º (B) θ = 120º (C) θ = 150º (D) 180º 9. Photons having energy equivalent to binding energy of 2 nd state of Li + ion are used at metal surface of work function 10.6 eV. If the ejected electrons are further accelerated through the potential difference of 5 V then the minimum value of de-Broglie wavelength associated with the electron is – (A) 2.45 Å (B) 9.15 Å (C) 5 Å (D) 11 Å This section contains 4 questions numbered 10 to 13, (Reason and Assertion type question). Each question contains Assertion (A) and Reason (R). Each question has 4 choices (A), (B), (C) and (D) out of which ONLY ONE is correct. Mark your response in OMR sheet against the question number of that question. +3 marks will be given for each correct answer and – 1 mark for each wrong answer. The following questions given below consist of an "Assertion" (A) and "Reason" (R) Type questions. Use the following Key to choose the appropriate answer. (A) If both (A) and (R) are true, and (R) is the correct explanation of (A). (B) If both (A) and (R) are true but (R) is not the correct explanation of (A). (C) If (A) is true but (R) is false. (D) If (A) is false but (R) is true. 10. Assertion (A) : N O O N O O is a macrocyclic ligand O O Reason (R) : The ligand in which donor atoms are N and O is known a cryptands. Y 11. Assertion (A) : For adsorption ∆G, ∆S and ∆H all have negative values. Reason (R) : Adsorption is spontaneous process accompained by increase in entropy. 12. Assertion (A) : For the concentration cell, Zn(s) | Zn 2+ (aq)(C1) | | Zn 2+ (aq) (C2)/Zn, for spontaneous cell reaction C1 < C2. RT C2 Reason (R) : For concentration cell,Ecell = ln nF C For spontaneous reaction, Ecell +ve ⇒ C2 > C1 13. Assertion (A) : Aryl halides undergo nucleophilic substitution with ease. Reason (R) : Carbon-halogen bond in aryl halides has partial double bond character. This section contains 2 paragraphs; each has 3 multiple choice questions. (Questions 14 to 19) Each question has 4 choices (A), (B), (C) and (D) out of which ONLY ONE is correct. Mark your response in OMR sheet against the question number of that question. +4 marks will be given for each correct answer and – 1 mark for each wrong answer. Passage # 1 (Ques. 14 to 16) FeCl3 on reaction with K4 [Fe(CN) 6 ] in aqueous solution gives blue colour, according the equation 4FeCl3 + 3K4[Fe(CN)6] → Fe4[Fe(CN)6]3 + 12 KCl At 300 K two aqueous solution of K4 [Fe(CN) 6 ] & FeCl3 with equal concentrations 0.1 M. These two solutions are separated by a semipermeable membrane AB as shown in figure. A 0.1M 0.1M K4[Fe(CN)6] B 14. What is correct – (A) side ‘x’ is hypotonic (B) side ‘y’ is hypotonic (C) both are isotonic (D) None of these 15. What is true about the solutions – (A) blue colour forms in side ‘x’ (B) blue colour forms in side ‘y’ (C) blue colour forms on both sides (D) No blue colour formation 16. By applying external pressure osmosis can be stopped it should be applied to – (A) side ‘x’ (B) side ‘y’ (C) equal on both the sides (D) can not be stopped by applying external pressure XtraEdge for IIT-JEE 55 FEBRUARY 2012 side'x' FeCl3 side'y' 1
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- Page 37 and 38: z 1 K2 = = y( 0. 48M − z) 1. 26×
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- Page 45 and 46: dx (ii) ∫ 2 ax + bx + c This can
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<strong>Xtra</strong><strong>Edge</strong> for IIT-JEE 54 FEBRUARY <strong>2012</strong>
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