Practice questions
88551 published questions with worked solutions.
- The results given in the below table were obtained during kinetic studies of the following reaction: 2A+B C+D | Experiment |...
- The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following...
- Two elements A and B have similar chemical roperties. They don't form solid hydrogencarbonates, but react with nitrogen to form...
- Amongst the following statements regarding adsorption, those that are valid are : (a) H becomes less negative as adsorption...Not in JEE Main or NEET syllabus
- Match the type of interaction in Column A with the distance dependence of their interaction energy in Column B : | A | B |...
- The correct observation in the following reactions is : Sucrose [ (Hydrolysis) ] Glycosidic bond Cleavage A+B Seliwanoff's...
- The molecular geometry of SF_6 is octahedral. What is the geometry of SF_4 (including lone pair(s) of electrons, if any) ?
- The heat of combustion of ethanol into carbon dioxides and water is –327 kcal at constant pressure. The heat evolved (in cal) at...
- For the disproportionation reaction 2Cu^+(aq) Cu(s)+Cu^ 2+ (aq) at 298 K, ln K (where K is the equilibrium constant) is _____ 10^...
- The oxidation states of transition metal atoms in K_2Cr_2O_7 , KMnO_4 and K_2FeO_4 , respectively, are x, y and z. The sum of x,...
- The ratio of the mass percentages of 'C & H' and 'C & O' of a saturated acyclic organic compound 'X' are 4 : 1 and 3 : 4...
- The area (in sq. units) of an equilateral triangle inscribed in the parabola y^2=8x, with one of its vertices on the vertex of...
- Let n > 2 be an integer. Suppose that there are n Metro stations in a city located along a circular path. Each pair of stations...
- If the equation ^4 + ^4 + =0 has real solutions for , then lies in the interval :Not in JEE Main syllabus
- Let f(x) be a quadratic polynomial such that f(–1) + f(2) = 0. If one of the roots of f(x) = 0 is 3, then its other root lies in :
- Let a, b, c R be all non-zero and satisfy a^3+b^3+c^3=2. If the matrix A= pmatrix a&b&c &c&a &a&b pmatrix satisfies A^TA=I, then...
- Let f : (–1, ∞) → R be defined by f(0) = 1 and f(x)= 1 x _e(1+x), x 0. Then the function f :
- If the sum of first 11 terms of an A.P., a_1, a_2, a_3, ........ is 0 (a_1 0), then the sum of the A.P., a_1, a_3, a_5, ..., a_...
- The imaginary part of (3+2 -54 )^ 1/2 - (3-2 -54 )^ 1/2 can be :
- _ x 0 ( ( 4 +x ) )^ 1/x is equal to :