JEE Main questions
34495 published questions with worked solutions.
- Consider a weak base 'B' of pK_b = 5.699. 'x' mL of 0.02 M HCl and 'y' mL of 0.02 M weak base 'B' are mixed to make 100 mL of a...
- An organic compound undergoes first order decomposition. The time taken for decomposition to ( 1 8 )^ th and ( 1 10 )^ th of its...
- Given below are two statements: Statement I: The number of species among BF_4^-, SiF_4, XeF_4 and SF_4, that have unequal E-F...
- Regarding the hydrides of group 15 elements EH_3 (E=N,P,As,Sb), select the correct statement from the following: A. The stability...
- Given below are two statements: Statement I: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use...
- The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series....
- Given below are two statements : Statement I : The number of pairs, from the following, in which both the ions are coloured in...
- 500 mL of 1.2 M KI solution is mixed with 500 mL of 0.2M KMnO_4 solution in basic medium. The liberated iodine was titrated with...
- Consider the following redox reaction taking place in acidic medium BH_4^-(aq) + ClO_3^-(aq) H_2BO_3^-(aq) + Cl^-(aq) If the...
- X is the number of geometrical isomers exhibited by [Pt(NH_3)(H_2O)BrCl]. Y is the number of optically inactive isomer(s)...
- Consider the dissociation equilibrium of the following weak acid HA H^+(aq) + A^-(aq). If the pKa of the acid is 4, then the pH...
- Given below two statements : Statement I : 13^ 13 25^ 13 20^ 13 8^ 13 3 is divisible by 7. Statement II : The integral part of...
- Let A be the focus of the parabola y^2 = 8x. Let the line y = mx+c intersect the parabola at two distinct points B and C. If the...
- The probability distribution of a random variable X is given below : | X | 4k | 30 7 k | 32 7 k | 34 7 k | 36 7 k | 38 7 k | 40 7...
- Considering the principal values of inverse trigonometric functions, the value of the expression (2 ^ -1 ( 2 13 )-2 ^ -1 ( 3 10 )...
- Given below are two statements : Statement I : The function f:R R defined by f(x)= x 1+|x| is one-one. Statement II : The...
- An ellipse has its center at (1,-2), one focus at (3,-2) and one vertex at (5,-2). Then the length of its latus rectum is :
- Let the ellipse E: x^2 144 + y^2 169 =1 and the hyperbola H: x^2 16 - y^2 ^2 =-1 have the same foci. If e and L respectively...
- Let P_1: y=4x^2 and P_2: y=x^2+27 be two parabolas. If the area of the bounded region enclosed between P_1 and P_2 is six times...
- Let the circle x^2+y^2=4 intersect x-axis at the points A(a,0), a>0 and B(b,0). Let P(2 , 2 ), 0< < 2 and Q(2 ,2 ) be two points...