
11. Which of the following elements exhibits allotropy? a) Oxygen b) Nitrogen c) Carbon d)
Hydrogen
12. The rate of a reaction doubles when the concentration of the reactant is doubled. The
order of the reaction is: a) Zero b) First c) Second d) Third
13. Which of the following is a natural polymer? a) Polyethylene b) PVC c) Starch d) Teflon
Mathematics:
1. The value of sin 30° + cos 60° is: a) 0 b) 1/2 c) 1 d) √3/2
2. If A = [[1, 2], [3, 4]], then the determinant of A is: a) -2 b) 2 c) 10 d) -10
3. The equation of the straight line passing through the points (1, 2) and (2, 3) is: a) y = x +
1 b) y = 2x c) y = x - 1 d) y = 3x - 1
4. The derivative of x² + 2x + 1 is: a) 2x + 2 b) x + 1 c) 2x + 1 d) x² + 2
5. If f(x) = x² - 4x + 5, then the minimum value of f(x) is: a) 1 b) 2 c) 3 d) 4
6. The integral of sin 2x is: a) cos 2x + C b) -cos 2x + C c) (1/2)cos 2x + C d) -(1/2)cos 2x +
C
7. The area of the triangle with vertices (1, 0), (0, 1), and (0, 0) is: a) 1/2 b) 1 c) 2 d) 4
8. The value of lim (x→0) sin x / x is: a) 0 b) 1 c) ∞ d) -1
9. If the mean and variance of a binomial distribution are 6 and 4 respectively, then the
number of trials is: a) 9 b) 10 c) 12 d) 15
10. If A = [[1, 2], [3, 4]] and B = [[5, 6], [7, 8]], then A + B is: a) [[6, 8], [10, 12]] b) [[6, 7], [8,
9]] c) [[1, 7], [3, 11]] d) [[5, 2], [7, 4]]
11. The equation of the circle with center (2, -3) and radius 4 is: a) (x - 2)² + (y + 3)² = 4 b) (x
+ 2)² + (y - 3)² = 16 c) (x - 2)² + (y + 3)² = 16 d) (x + 2)² + (y - 3)² = 4
12. The value of cos 120° is: a) 1/2 b) -1/2 c) √3/2 d) -√3/2
13. The derivative of ln x is: a) x b) 1/x c) eˣ d) ln x
14. The probability of getting at least one head when three coins are tossed is: a) 1/8 b) 3/8
c) 7/8 d) 1