Practice questions
88551 published questions with worked solutions.
- Identify the homoleptic complexes with odd number of d electrons in the central metal. (A) [FeO_4]^ 2- (B) [Fe(CN)_6]^ 3- (C)...
- Total number of sigma ( ) _____ and pi( ) _____ bonds respectively present in hex-1-en-4-yne are :
- Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of...
- Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle was 16 mg/mL which becomes 4...
- First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that...
- Consider the following low-spin complexes K_3[Co(NO_2)_6], K_4[Fe(CN)_6], K_3[Fe(CN)_6], Cu_2[Fe(CN)_6] and Zn_2[Fe(CN)_6]. The...
- In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g benzaldehyde, a total of 3.51 g of product was obtained....
- Total number of non bonded electrons present in NO_2^- ion based on Lewis theory is _____.
- If _ x 0 (2x) + a (4x) - b x^4 is finite, then (a + b) is equal to :
- If _ r=0 ^ 10 ( 10^ r+1 -1 10^r ) ^ 11 C_ r+1 = ^ 11 -11^ 11 10^ 10 , then is equal to :
- Let (a, b) be the point of intersection of the curve x^2 = 2y and the straight line y - 2x - 6 = 0 in the second quadrant. Then...
- If [- 7 6 , 4 3 ], then the number of solutions of 3 ^2 - 2( 3 -1) - 4 = 0, is equal to :Not in JEE Main syllabus
- If the mean and the variance of 6, 4, a, 8, b, 12, 10, 13 are 9 and 9.25 respectively, then a + b + ab is equal to :
- If the domain of the function f(x) = 1 10+3x-x^2 + 1 x+|x| is (a, b), then (1+a)^2 + b^2 is equal to :
- Given three indentical bags each containing 10 balls, whose colours are as follows : Bag I: Red 3, Blue 2, Green 5 Bag II: Red 4,...
- The line L_1 is parallel to the vector a = -3 i + 2 j + 4 k and passes through the point (7, 6, 2) and the line L_2 is parallel...
- Let f : [1, ) [2, ) be a differentiable function. If 10 _1^x f(t) ,dt = 5xf(x) - x^5 - 9 for all x 1, then the value of f(3) is :
- Let A = 1, 2, 3,...., 100 and R be a relation on A such that R = (a, b): a = 2b + 1 . Let (a_1, a_2), (a_2, a_3), (a_3, a_4), ,...
- Let the point P of the focal chord PQ of the parabola y^2 = 16x be (1, –4). If the focus of the parabola divides the chord PQ in...
- If the length of the minor axis of an ellipse is equal to one fourth of the distance between the foci, then the eccentricity of...