This document contains an unsolved practice paper for the IIT JEE chemistry exam from 2011. It consists of 23 multiple choice questions across 4 sections - single answer, multiple answer, paragraph and integer answer types. The questions cover topics like equations, vectors, functions, probabilities, planes, parabolas, gases and arithmetic/quadratic equations. The full paper is provided for review and practice in preparation for the IIT JEE exam.
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IITJEE -Mathematics 2011-i
1. IIT JEE –Past papers CHEMISTRY- UNSOLVED PAPER - 2011
2. SECTION – I Single Correct Answer Type This section contains 7 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
3. 01 Problem Let (x0, y0) be solution of the following equations Then X is a. 1/6 b. 1/3 c. 1/2 d. 6
4. Problem 02 Let P = {θ : sin θ - cos θ = cos θ} and Q = {θ : sin q + cos θ = sin θ} be two sets. Then a. b. c. d.
5. Problem 03 Let = and = be three vectors. A vector in the plane of , whose projection on is given by a. b. c. d.
7. Problem 05 A straight line L through the point (3, -2) is inclined at an angle 60° to the line x + y = 1. If L also intersects the x-axis, then the equation of L is a. b. c. d.
8. Problem 06 Let α and β be the roots of x2 – 6x – 2 = 0, with a > b. If an = α n – βn for n 1, then the value of is 1 2 3 4
9. Problem 07 Let the straight line x = b divides the area enclosed by y = (1 - x)2, y = 0 and x = 0 into two parts R1(0 x b) and R2(b x 1) such that R1 - R2 = 1 /4 . Then b equals 3/4 1/2 1/3 1/4
10. SECTION – II Multiple Answer Type This section contains 4 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONE OR MORE may be correct.
11. 08 Problem Let f: R R be a function such that f(x + y) = f(x) + f(y), x, y R. If f(x) is differentiable at x = 0, then f(x) is differentiable only in a finite interval containing zero f(x) is continuous x R f¢(x) is constant x R f(x) is differentiable except at finitely many points
12. Problem 09 The vector(s) which is/are coplanar with vectors and and perpendicular to the vector is/are a. b. c. d.
13. Problem 10 Let the eccentricity of the hyperbola =1 be reciprocal to that of the ellipse x2 + 4y2 = 4. If the hyperbola passes through a focus of the ellipse, then the equation of the hyperbola is a focus of the hyperbola is (2, 0) the eccentricity of the hyperbola is the equation of the hyperbola is x2 – 3y2 = 3
14. Problem 11 Let M and N be two 3 ´ 3 non-singular skew symmetric matrices such that MN = NM. If PT denotes the transpose of P, then M2N2 (MTN)–1 (MN–1)T is equal to M2 – N2 – M2 MN
15. SECTION – III Paragraph Type This section contains 2 paragraphs. Based upon one of paragraphs 2 multiple choice questions and based on the other paragraph 3 multiple choice questions have to be answered. Each of these questions has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
16. Paragraph for Question Nos. 12 and 13 Let U1 and U2 be two urns such that U1 contains 3 white and 2 red balls, and U2 contains only 1 white ball. A fair coin is tossed. If head appears then 1 ball is drawn at random from U1 and put into U2. However, if tail appears then 2 balls are drawn at random from U1 and put into U2. Now 1 ball is drawn at random from U2.
17. 12 Problem The probability of the drawn ball from U2 being white is 13/30 23/90 c. 19/30 d. 11/30
18. Problem 13 Given that the drawn ball from U2 is white, the probability that head appeared on the coin is 17/23 11/23 15/23 12/23
19. Paragraph for Question Nos. 14 to 16 Let a, b and c be three real numbers satisfying (E)……
20. Problem 14 If the point P(a, b, c), with reference to (E), lies on the plane 2x + y + z = 1, then the value of 7a + b + c is 0 12 7 6
21. Problem 15 Let w be a solution of x3 – 1 = 0 with Im(w) > 0. If a = 2 with b and c satisfying (E), then the value of is equal to -2 2 3 -3
22. Problem 16 Let b = 6, with a and c satisfying (E). If α and βare the roots of the quadratic equation ax2 + bx + c = 0 is 6 7 6/7 ∞
23. SECTION – IV Integer Answer Type This section contains 7 questions. The answer to each of the questions is a single digit integer, ranging from 0 to 9. The bubble corresponding to the correct is to be darkened in the ORS.
24. 17 Problem Consider the parabola y2 = 8x. Let ∆1 be the area of the triangle formed by the end points of its latus rectum and the point P on the parabola, and ∆2 be the area of the triangle formed by drawing tangents at P and at the end points of the latus rectum. Then ∆1/ ∆2 is
26. Problem 19 Let f: [1,∞) ->[2, ∞) be a differentiable function such that f(1) = 2. If 6f t dt = 3xf x - x for all x ≥ 1, then the value of f(2) is
27. Problem 20 The positive integer value of n > 3 satisfying the equation is
28. Problem 21 Let a1, a2, a3, …, a100 be an arithmetic progression with a1 = 3 and For any integer n with 1 ≤ n ≤ 20, let m = 5n if does not depend on n, then a2 is
29. Problem 22 To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound (vapour pressure 0.68 atm. at 0oC) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0oC is close to
30. Problem 23 The minimum value of the sum of real numbers a–5, a–4, 3a–3, 1, a8 and a10 with a > 0 is