JEE Main questions
34495 published questions with worked solutions.
- The correct statements among I to III are: (I) Valence bond theory cannot explain the color exhibited by transition metal...
- HF has highest boiling point among hydrogen halides, because it has:
- What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI = 166 g mol^ -1 )
- The peptide that gives positive ceric ammonium nitrate and carbylamine tests is:
- 10 mL of 1 mM surfactant solution forms a monolayer covering 0.24 cm^2 on a polar substrate. If the polar head is approximated as...Not in JEE Main or NEET syllabus
- Assertion: For the extraction of iron, haematite ore is used. Reason: Haematite is a carbonate ore of iron.Not in JEE Main or NEET syllabus
- At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given...
- The amorphous form of silica is:
- Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr radius is...
- If the system of equations 2x + 3y - z = 0, x + ky - 2z = 0 and 2x - y + z = 0 has a non-trivial solution (x, y, z), then x y + y...
- The common tangent to the circles x^2 + y^2 = 4 and x^2 + y^2 + 6x + 8y - 24 = 0 also passes through the point:
- If e^ x ( x x ,f(x) + ( x x + ^2x) )dx = e^ x f(x) + C, then a possible choice of f(x) is:
- If the tangent to the parabola y^2 = x at a point (α, β), (β > 0) is also a tangent to the ellipse, x^2 + 2y^2 = 1, then α is...
- The total number of matrices A = pmatrix 0 & 2y & 1 2x & y & -1 2x & -y & 1 pmatrix , (x, y ∈ R, x ≠ y) for which A^TA = 3I_3 is:
- If f: R R is a differentiable function and f(2) = 6, then _ x 2 _6^ f(x) 2t ,dt (x-2) is:
- If a unit vector a makes angles π/3 with i, π/4 with j and θ ∈ (0, π) with k, then a value of θ is:
- The area (in sq. units) of the smaller of the two circles that touch the parabola, y^2 = 4x at the point (1, 2) and the x-axis is:
- Two newspapers A and B are published in a city. It is known that 25% of the city population reads A and 20% reads B while 8%...
- The sum of the series 1 + 2 × 3 + 3 × 5 + 4 × 7 + .... up to 11th term is:
- If the function f(x) = cases a| - x| + 1, & x 5 b|x - | + 3, & x > 5 cases is continuous at x = 5, then the value of a − b is: