JEE Main questions
34495 published questions with worked solutions.
- K_ sp for Cr(OH)_3 is 1.6 10^ -30 . What is the molar solubility of this salt in water?
- Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is...
- Given below are two statements I and II. Statement I : Dumas method is used for estimation of "Nitrogen" in an organic compound....
- The carbohydrates "Ribose" present in DNA, is A. A pentose sugar B. present in pyranose from C. in "D" configuration D. a...
- The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of
- Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?
- Which of the following statement is true with respect to H_2O, NH_3 and CH_4? A. The central atoms of all the molecules are...
- Given below are two statements : Statement-I : The conversion proceeds well in the less polar medium. CH_3-CH_2-CH_2-CH_2-Cl HO^-...
- 37.8 g N_2O_5 was taken in a 1 L reaction vessel and allowed to undergo the following reaction at 500 K 2N_2O_5(g) 2N_2O_4(g) +...
- Standard entropies of X_2, Y_2 and XY_5 are 70, 50 and 110 J K⁻¹ mol⁻¹ respectively. The temperature in Kelvin at which the...
- Xg of benzoic acid on reaction with aq. NaHCO_3 release CO_2 that occupied 11.2 L volume at STP. X is _____ g.
- Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with...
- Consider the following reaction occurring in the blast furnace. Fe_3O_4(s) + 4CO(g) 3Fe(l) + 4CO_2(g) 'x' kg of iron is produced...
- The equation of the chord, of the ellipse x^2 25 + y^2 16 =1, whose mid-point is (3,1) is :
- The function f : (- , ) (-1,1), defined by f(x)= 2^x-2^ -x 2^x+2^ -x is :
- If > > > 0, then the expression ^ -1 + (1+ ^2) ( - ) + ^ -1 + (1+ ^2) ( - ) + ^ -1 + (1+ ^2) ( - ) is equal to :
- Let f : (0, ) R be a function which is differentiable at all points of its domain and satisfies the condition x^2f'(x) = 2xf(x) +...
- Let A = x (0, )- 2 : _ (2/ ) | x| + _ (2/ ) | x| = 2 and B = x 0 : x ( x -4)-3| x -2|+6=0 . Then n(A B) is equal to :
- Let [x] denote the greatest integer function, and let m and n respectively be the numbers of points, where the function f(x) =...
- In an arithmetic progression, if S_ 40 = 1030 and S_ 12 = 57, then S_ 30 - S_ 10 is equal to :