41. Why is copper a preferred choice in making electrical wires? A. Copper is a good conductor of electricity B. Poor conductor of electricity C. insulator D. superconductor Answer Option : A 42. Conductors are materials that allow A. Allow the flow of heat B. Does not allow heat to flow C. Allows cold to […]
51. Which of the following statements is true for a dielectric? A. Dielectrics are superconductors at high temperature B. Dielectrics are superconductors at low temperature C. The cannot become superconductors D. They have very less breakdown voltage Answer Option : B 52. The dielectric constant cannot be _____. A. Infinity B. 5 C. 6 D.
61. Cyclotron can be used in _______. A. Particle therapy to treat cancer B. source of high energy beam for a nuclear physics experiment C. Produced short-lived positron -emitting isotopes for PET imaging D. All of the above Answer Option : D 62. A Cyclotron can accelerate _______. A. β particles B. α particles C.
71. Find the dielectric constant for material with electric susceptibility of 5. A. 4 B. 6 C. 7 D. 3 Answer Option : B 72. The logic behind NOR gate is that it gives A. High output when both the inputs are low B. Low output when both the inputs are low C. High output
81. The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 is _______. A. 20 B. 125 C. 200 D. 75 Answer Option : B 82. A transmission line has a voltage of 24 V and a conduction current of 1.2 A. What will its receiving impedance? A. 25.2
91. Which of the following statement is true if a body moves in a semicircular track whose radius is R. A. 2R is the displacement of the body B. πR is the distance travelled by the body C. Both (a) and (b) are correct D. None of the above. Answer Option : C 92. What
Learn and practice General Knowledge questions and answers on Mathematics with very easy and understandable explanations. GK questions are very helpful. JEE Mathematics Syllabus Mathematics JEE Syllabus Sets, relations and functions Complex number and quadratic equations Matrices and determinants Permutations and combinations Mathematical induction Binomial theorem and its simple applications Sequences and series Limit, continuity
91. Which of the following represents coinitial vector? A. c, d B. m, b C. b, d D. b, d Answer Option : D 92. The vectors 3i^+5j^+2k^,2i^−3j^−5k^ and 5i^+2j^−3k^ form the sides of A. Isosceles triangle B. Right triangle C. Scalene triangle D. Equilaterala triangle Answer Option : D 93. The vectors a=xi^−2j^+5k^ and
81. The summation of two unit vectors is a third unit vector, then the modulus of the difference of the unit vector is A. √3 B. 1 – √3 C. 1 + √3 D. -√3 Answer Option : A 82. The vectors λi^+j^+2k^,i^+λj^−k^ and 2i^−j^+λk^ are coplanar if A. λ = -2 B. λ =
71. The tangent to the curve y = 2×2 -x + 1 is parallel to the line y = 3x + 9 at the point A. (2, 3) B. (2, -1) C. (2, 1) D. (1, 2) Answer Option : D 72. The tangent to the curve y = x2 + 3x will pass through
61. Find the maximum profit that a company can make, if the profit function is given by P(x) = 41 + 24x – 18×2. A. 25 B. 43 C. 62 D. 49 Answer Option : D 62. If y = x3 + x2 + x + 1, then y A. has a local minimum B.
51. If the points (3, -2), (x, 2), (8, 8) are collinear, then find the value of x. A. 2 B. 3 C. 4 D. 5 Answer Option : D 52. Using determinants, find the equation of the line joining the points (1, 2) and (3, 6). A. y = 2x B. x = 3y
31. If the order of the matrix is m×n, then how many elements will there be in the matrix? A. mn B. 2mn C. mn2 D. m2 n2 Answer Option : A 32. Which of the following is not a type of matrix? A. Scalar matrix B. Minor matrix C. Diagonal matrix D. Symmetric matrix
41. Let * be a binary operation on Q, defined by a * b = 3ab5 is A. Commutative B. Associative C. Both (a) and (b) D. None of these Answer Option : C 42. Let * be a binary operation on set Q of rational numbers defined as a * b = ab5. Write
21. What is the value of sin-1(-x) for all x belongs to [-1, 1]? A. sin-1(-x)/2 B. -sin-1(x) C. sin-1(x) D. 2sin-1(x) Answer Option : B 22. What is the value of cos-1(-x) for all x belongs to [-1, 1]? A. cos-1(-x) B. π – cos-1(x) C. π – cos-1(-x) D. π + cos-1(x) Answer
11. A function f:R→R defined by f(x)=5×4+2 is one – one but not onto. A. True B. False Answer Option : B 12. Let A={1,2,3} and B={4,5,6}. Which one of the following functions is bijective? A. f={(1,4),(2,5),(3,6)} B. f={(1,4),(1,5),(1,6)} C. f={(1,5),(2,4),(3,4)} D. f={(2,4),(2,5),(2,6)} Answer Option : A 13. Let M={5,6,7,8} and N={3,4,9,10}. Which one of
01. Which of the following relations is symmetric and transitive but not reflexive for the set I = {4, 5}? A. R = {(4, 4), (5, 5)} B. R = {(4, 5), (5, 4)} C. R = {(4, 5), (5, 4), (4, 4)} D. R = {(4, 4), (5, 4), (5, 5)} Answer Option :
Learn and practice General Knowledge questions and answers on Chemistry with very easy and understandable explanations. GK questions are very helpful. JEE Chemistry Syllabus Chemistry JEE Syllabus Some basic concepts in chemistry States of matter Atomic structure Chemical bonding and molecular structure Chemical thermodynamics Solutions Equilibrium Redox reactions and electrochemistry Chemical kinetics Surface chemistry Classification
21. Geometrical isomerism is exhibited by ______. A. Butanol B. 2-Butenol C. 2-Butyne D. 2-Butene Answer Option : D 22. Which of the following will form 2 acetaldehyde molecules on ozonolysis? A. 1-butene B. 1-pentene C. 2-butene D. 2-pentene Answer Option : C 23. Identify the addition reaction which is not undergone by the alkenes?
11. Which of the following is true regarding polyhydric alcohols? A. It should have more than four OH groups B. It should have three or more OH groups C. It should have two or more OH groups D. It should have one or more OH groups Answer Option : C 12. Benzene diazonium chloride on
01. Which of the following is used as an indicator in the titration of a strong acid and a weak base? A. Methyl orange B. Phenolphthalein C. Thymol blue D. Fluorescein Answer Option : 02. The ideal indicator for the titration of strong acid and weak base should have pH range between ______. A. 3-5
31. Ziegler Natta catalyst is associated with _____. A. hydrogenation of alkenes B. hydroformylation of alkenes C. polymerisation of alkenes D. none of the above Answer Option : C 32. Which of the following is incorrect for a catalyst? A. Catalyst does not start a reaction B. Co-enzymes increase the activity of an enzyme C.
41. Good conductors have many loosely bound _____. A. atoms B. electrons C. protons D. molecules Answer Option : B 42. As temperature increases electrolytic conduction _____. A. increases B. decreases C. remains unaffected D. either increases or decreases Answer Option : A 43. With a rise in temperature, the resistance of semiconductors _____. A.
51. Formation of interstitial compounds makes the transition metals more ________. A. soft B. ductile C. malleable D. hard Answer Option : D 52. Transition elements exhibit variable valency because they release electrons from ________. A. ns orbitals B. np orbitals C. (n-1)d orbitals D. (n-1)d & ns orbitals Answer Option : C 53. In
61. The maximum number of electrons that can fit in all the orbitals with n = 2 and l = 1? A. 2 B. 4 C. 4 D. 8 Answer Option : C 62. Which of the following quantum numbers can distinguish between two electrons present in the same orbital? A. Azimuthal quantum number B.
