JEE Main questions
34495 published questions with worked solutions.
- The correct match between Item-I and Item-II is: List-I: (a) High density polythene (b) Polyacrylonitrile (c) Novolac (d) Nylon 6...Not in JEE Main or NEET syllabus
- The correct order of the first ionization enthalpies is:
- For the reaction, 2SO_2(g) + O_2(g) ⇌ 2SO_3(g), ΔH = −57.2 kJ mol^ -1 and K_C = 1.7 10^ 16 . Which of the following statement is...
- The difference between ΔH and ΔU (ΔH − ΔU), when the combustion of one mole of heptane (l) is carried out at a temperature T, is...
- The pH of a 0.02 M NH_4Cl solution will be [given K_b(NH_4OH) = 10^ -5 and log 2 = 0.301]
- Which of these factors does not govern the stability of a conformation in acyclic compounds?
- The correct statements among (a) to (d) are: (a) saline hydrides produce H_2 gas when reacted with H_2O. (b) reaction of LiAlH_4...Not in JEE Main or NEET syllabus
- The increasing order of nucleophilicity of the following nucleophiles is: (a) CH_3CO_2^ (b) H_2O (c) CH_3SO_3^ (d) O H
- Air pollution that occurs in sunlight is:Not in JEE Main or NEET syllabus
- If _ x 1 x^2-ax+b x-1 = 5, then a + b is equal to:
- The locus of the centres of the circles, which touch the circle, x^2 + y^2 = 1 externally, also touch the y-axis and lie in the...
- The number of real roots of the equation 5 + |2^x - 1| = 2^x(2^x - 2) is:
- A spherical iron ball of radius 10 cm is coated with a layer of ice of uniform thickness that melts at a rate of 50 cm^3/min....
- The sum 1 + 1^3+2^3 1+2 + 1^3+2^3+3^3 1+2+3 + + 1^3+2^3+3^3+ +15^3 1+2+3+ +15 - 1 2 (1+2+3+ +15) is equal to:
- If the plane 2x - y + 2z + 3 = 0 has the distances 1 3 and 2 3 units from the planes 4x - 2y + 4z + = 0 and 2x - y + 2z + = 0,...
- Let f(x) = _e( x), (0 < x < ) and g(x) = ^ -1 (e^ -x ), (x 0). If α is a positive real number such that a = (f g)'( ) and b = (f...
- The angles A, B and C of a triangle ABC are in A.P. and a : b = 1 : 3. If c = 4 cm, then the area (in sq. cm) of this triangle is:Not in JEE syllabus
- Minimum number of times a fair coin must be tossed so that the probability of getting at least one head is more than 99% is:
- Let λ be a real number for which the system of linear equations x + y + z = 6, 4x + y - z = - 2, 3x + 2y - 4z = -5 has infinitely...
- If z and w are two complex numbers such that |zw| = 1 and (z) - (w) = 2 , then: