1. Xtra Edge February 2012 - Career Point
1. Xtra Edge February 2012 - Career Point 1. Xtra Edge February 2012 - Career Point
22. Match the column : Column-I (A) A photon stimulates the emission of another photon of (B) Photons of electromagnetic wave of different wavelengths may have (C) Two points on a wavefront must have (D) For constructive interference the waves must have Column-II (P) Same direction (Q) Same energy (R) Same phase (S) Same frequency CHEMISTRY Questions 1 to 9 are multiple choice questions. Each question has four 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. 1. The phenomenon of optical activity will be shown by - A A B B A (A) M B B A A (C) en M A en (B) (D) 2. Titration curve of Na2CO3 and HCl is as given below. The indicators In1 and In2 respectively, must be – pH 12 10 8 6 4 2 B B en M B M en 10 20 30 40 50 60 Volume of HCl (ml) B en In1 In2 (A) phenolphthalein and methyl orange (B) methyl orange and phenolphthalein (C) methyl orange and phenol red (D) phenolphthalein and phenol red. 3. Metallic sulphates can be obtained by reacting the metals (above hydrogen in ECS), or its oxide, hydroxide or carbonate with dil.H2SO4. Gp IA metals also form hydrogen sulphates which can be isolated in solid. In general metal sulphates are soluble in water and crystallizes with water of crystallization. Sulphate are thermally more stable than nitrates. Select the stable hydrogen sulphate which can be obtained in solid state - (A) KHSO4 (B) CaHSO4 (C) FeHSO4 (D) All of these 4. Which of the following represent glyptal - O O (A) ––O–CH2–CH2–O–C C––– 4 O O (B) ––NH–(CH2)6–NH–C––(CH2)4– C––– 4 O O (C) O O 4 XtraEdge for IIT-JEE 50 FEBRUARY 2012 (D) O N H 5. In the Cannizzaro's reaction given below : ⎯ – OH 2Ph – CHO ⎯→ ⎯ Ph–CH2OH + PhCOO –- the slowest step is - (A) the attack of OH – at the carbonyl group (B) the transfer of hydride to the carbonyl group (C) the abstraction of proton from the carboxylic acid (D) the deprotonation of Ph–CH2OH 6. The relative rates of solvolysis in 80% EtOH of the following bromides is in the order – Br Br I II III (A) I > II > III (B) III > II > I (C) II > III > I (D) II > I > III 4 Br
XtraEdge for IIT-JEE 51 FEBRUARY 2012
- Page 3 and 4: Volume - 7 Issue - 8 February, 2012
- Page 5 and 6: 25% increase in number of girls fro
- Page 7 and 8: Dr Amitabha Ghosh was the only Asia
- Page 9 and 10: Sol. (i) The capacitor A with diele
- Page 11 and 12: Sol. (i) Let m be the mass of elect
- Page 13 and 14: Step 5. 1 gram equivalent acid neut
- Page 15 and 16: = 2π ∫ π 2 / 3 2 t sec dt 2 t 1
- Page 17 and 18: (A) (C) A 2B0πqR 3 B 0 PR 3 2 ×
- Page 19 and 20: PHYSICS 1. AB and CD are two ideal
- Page 21 and 22: 4. In a Young's experiment, the upp
- Page 23 and 24: Matter Waves : Planck's quantum the
- Page 25 and 26: The intercept of V0 versus ν graph
- Page 27 and 28: PHYSICS FUNDAMENTAL FOR IIT-JEE The
- Page 29 and 30: etween total mass and number of mol
- Page 31 and 32: KEY CONCEPT Organic Chemistry Funda
- Page 33 and 34: KEY CONCEPT Inorganic Chemistry Fun
- Page 35 and 36: 1. It is possible to supercool wate
- Page 37 and 38: z 1 K2 = = y( 0. 48M − z) 1. 26×
- Page 39 and 40: MATHEMATICAL CHALLENGES 1. as φ (a
- Page 41 and 42: 9. Point P (x, 1/2) under the given
- Page 43 and 44: 10. 11 ∴ n(E) = 10 + 9 + 8 + ...
- Page 45 and 46: dx (ii) ∫ 2 ax + bx + c This can
- Page 47 and 48: MATHS Functions with their Periods
- Page 49 and 50: a PHYSICS Questions 1 to 9 are mult
- Page 51: R P ⊗ B O ω0 14. Magnitude of cu
- Page 55 and 56: XtraEdge for IIT-JEE 53 FEBRUARY 20
- Page 57 and 58: 7. NaOH can be prepared by two meth
- Page 59 and 60: (C) X = 100 ml of SO2 at 1 bar, 25
- Page 61 and 62: 21. Column-I Column-II (A) If y = 2
- Page 63 and 64: (A) potential energy (PE) increases
- Page 65 and 66: 2. In the reaction 3 Cu + 8 HNO3
- Page 67 and 68: (D) P A T B (S) Pressure is increas
- Page 69 and 70: XtraEdge for IIT-JEE 67 FEBRUARY 20
- Page 71 and 72: 14. Derive the expression for the c
- Page 73 and 74: (a) temperature and (b) Pressure ?
- Page 75 and 76: should be bought to meet the requir
- Page 77 and 78: This work done is stored inside the
- Page 79 and 80: Use : It can be used to accelerate
- Page 81 and 82: 10. (i) (ii) Benzene H CH3 - C = O
- Page 83 and 84: NH3 NH3 NH3 Co +3 NH3 NH3 NH3 No un
- Page 85 and 86: 7. f(A) = A 2 - 5A + 7 I2 ⎡ 3 1
- Page 87 and 88: y 2 = - (2 - x) 2 + 9 This is the e
- Page 89 and 90: (0, 4) ( 2 3, 2) (4, 0) ⎡ 2 4 2
- Page 91 and 92: 15. X = ? Y = 20 Ω l1 = 40 cm l -
- Page 93 and 94: (i) Emission : - If radiations emit
- Page 95 and 96: OH (ii) + Br2 Phenol H2O 13. I st M
- Page 97 and 98: 28. (a) Acetylene is first oxidized
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- Page 101 and 102: = x 2 ⎡ ⎢ ⎢x ⎢ ⎣ 0 1 2 1
<strong>Xtra</strong><strong>Edge</strong> for IIT-JEE 51 FEBRUARY <strong>2012</strong>
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