Practice questions
88551 published questions with worked solutions.
- The electron gain enthalpy (in kJ/mol) of fluorine, chlorine, bromine and iodine, respectively, are :
- The relative strength of interionic / intermolecular forces in decreasing order is
- The theory that can completely/properly explain the nature of bonding in [ Ni(CO)_4 ] is
- Oxidation number of potassium in K_2O , K_2O_2 and KO_2 , respectively, is :
- The atomic radius of Ag is closest to :
- Match the following : List-I: (i) Riboflavin (ii) Thiamine (iii) Pyridoxine (iv) Ascorbic acid List-II: (a) Beriberi (b) Scurvy...
- The dipole moments of CCl_4 , CHCl_3 and CH_4 are in the order :
- A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated...
- The number of orbitals associated with quantum numbers n = 5, m_s=+ 1 2 is :
- For the reaction; A(l) 2B(g) U = 2.1 kcal, S = 20 cal K ^ -1 at 300 K Hence G in kcal is ______.
- Two solutions, A and B, each of 100 L was made by dissolving 4 g of NaOH and 9.8 g of H_2SO_4 in water, respectively. The pH of...
- The number of chiral carbons in chloramphenicol is ________.
- Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with...
- If Re ( z-1 2z+i )=1, where z = x + iy, then the point (x, y) lies on a :
- If the distance between the foci of an ellipse is 6 and the distance between its directrices is 12, then the length of its latus...
- Total number of 6-digit numbers in which only and all the five digits 1, 3, 5, 7 and 9 appear, is
- The greatest positive integer k, for which 49^k+1 is a factor of the sum 49^ 125 +49^ 124 + +49^2+49+1, is :
- Let and be two real roots of the equation (k+1) ^2x- 2 x=(1-k), where k ( -1) and are real numbers. If ^2( + )=50, then a value...
- The logical statement (p q) (q p) is equivalent to :Not in JEE syllabus
- If y = mx + 4 is a tangent to both the parabolas, y^2=4x and x^2=2by, then b is equal to