JEE Main questions
34495 published questions with worked solutions.
- The emf of cell Tl|Tl⁺(0.001 M)||Cu²⁺(0.01 M)|Cu is 0.83 V at 298 K. It could be increased by:
- Identify the correct statements about p-block elements and their compounds. (A) Non metals have higher electronegativity than...
- Given below are two statements: Statement (I): Kjeldahl method is applicable to estimate nitrogen in pyridine. Statement (II):...
- The reaction: ½H₂(g) + AgCl(s) → H⁺(aq) + Cl⁻(aq) + Ag(s) occurs in which of the following galvanic cell:
- Match List-I with List-II. List-I (Complex ion): (A) [Cr(NH₃)₆]³⁺ (B) [NiCl₄]²⁻ (C) [CoF₆]³⁻ (D) [Ni(CN)₄]²⁻ List-II (Spin only...
- Number of molecules having bond order 2 from the following molecule is _______. C₂, O₂, Be₂, Li₂, Ne₂, N₂, He₂
- The total number of carbon atoms present in tyrosine, an amino acid, is _______.
- Molality of an aqueous solution of urea is 4.44 m. Mole fraction of urea in solution is x × 10⁻³. Value of x is _______. (integer...
- Total number of unpaired electrons in the complex ion [Co(NH₃)₆]³⁺ and [NiCl₄]²⁻ is:
- A solution is prepared by adding 1 mole ethyl alcohol in 9 mole water. The mass percent of solute in the solution is _______...
- Let a = i + 2 j + 3 k, b = 2 i + 3 j - 5 k and c = 3 i - j + k be three vectors. Let r be a unit vector along b + c. If r a = 3,...
- In an increasing geometric progression of positive terms, the sum of the second and sixth terms is 70 3 and the product of the...
- The number of ways five alphabets can be chosen from the alphabets of the word MATHEMATICS, where the chosen alphabets are not...
- The sum of all possible values of θ ∈ [−π, 2π], for which 1 + i 1 - 2i is purely imaginary, is equal to:
- If the system of equations x + 4y − z = λ, 7x + 9y + μz = −3, 5x + y + 2z = −1 has infinitely many solutions, then (2μ + 3λ) is...
- If the shortest distance between the lines x - 2 = y - 4 3 = z - 3 4 and x - 2 4 = y - 4 6 = z - 7 8 is 13 29 , then a value of λ...
- If the value of 3 36° + 5 18° 5 36° - 3 18° is a 5 - b c , where a, b, c are natural numbers and gcd(a, c) = 1, then a + b + c is...
- Let y = y(x) be the solution curve of the differential equation sec y dy dx + 2x sin y = x³ cos y, y(1) = 0. Then y(√3) is equal...
- The area of the region in the first quadrant inside the circle x² + y² = 8 and outside the parabola y² = 2x is equal to:
- If the line segment joining the points (5, 2) and (2, a) subtends an angle 4 at the origin, then the absolute value of the...