JEE Main questions
34495 published questions with worked solutions.
- In Carius method of estimation of halogen, 0.172g of an organic compound showed presence of 0.08g of bromine. Which of these is...
- An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the...
- Which of the following compounds will show retention in configuration on nucleophic substitution by OH^- ion ?
- While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
- Consider the following reactions: (i) Glucose + ROH dry HCl Acetal x eq. of (CH_3CO)_2O acetyl derivative (ii) Glucose Ni/H_2 A y...
- Which of the following is used for the preparation of colloids ?Not in JEE Main or NEET syllabus
- The gibbs energy change (in J) for the given reaction at [ Cu^ 2+ ]=[ Sn^ 2+ ] = 1 M and 298K is: Cu(s)+Sn^ 2+ (aq.) Cu^ 2+...
- The mass of gas adsorbed, x, per unit mass of adsorbate, m, was measured at various pressures, p. A graph between x m and log p...Not in JEE Main or NEET syllabus
- The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are x, y and z. The sum of x, y and z is________....
- The internal energy change (in J) when 90g of water undergoes complete evaporation at 100ºC is ____ . (Given : H_ vap for water...
- If |x| < 1, |y| < 1 and x ≠ y, then the sum to infinity of the following series (x+y)+(x^2+xy+y^2)+(x^3+x^2y+xy^2+y^3)+
- Let >0, >0 be such that ^3+ ^2=4. If the maximum value of the term independent of x in the binomial expansion of ( x^ 1/9 + x^...
- If a function f(x) defined by f(x)= cases ae^x+be^ -x , & -1 x<1 cx^2, & 1 x 3 ax^2+2cx, & 3<x 4 cases be continuous for some a,...
- Box I contains 30 cards numbered 1 to 30 and Box II contains 20 cards numbered 31 to 50. A box is selected at random and a card...
- Let S be the set of all R for which the system of linear equations 2x-y+2z=2 x-2y+ z=-4 x+ y+z=4 has no solution. Then the set S
- Let A be a 2 × 2 real matrix with entries from 0, 1 and |A| ≠ 0. Consider the following two statements : (P) If A ≠ I_2, then |A|...
- The contrapositive of the statement "If I reach the station in time, then I will catch the train" is :Not in JEE syllabus
- Let y = y(x) be the solution of the differential equation, 2+ x y+1 dy dx =- x, y > 0, y(0) = 1. If y( ) = a and dy dx at x = is...
- Let X = x ∈ N : 1 ≤ x ≤ 17 and Y = ax + b: x ∈ X and a, b ∈ R, a > 0 . If mean and variance of elements of Y are 17 and 216...
- If the tangent to the curve y = x + sin y at a point (a, b) is parallel to the line joining (0, 3 2 ) and ( 1 2 ,2 ), then: