Chemistry questions
29404 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...
- Arrange the following compounds in increasing order of C – OH bond length : methanol, phenol, p-ethoxyphenol
- The third ionization enthalpy is minimum for :
- As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :Not in JEE Main or NEET syllabus
- The predominant intermolecular forces present in ethyl acetate, a liquid, are:
- A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63 °C while the other boils at 60 °C...
- The strength of an aqueous NaOH solution is most accurately determined by titrating : (Note : consider that an appropriate...
- For the Balmer series in the spectrum of H atom, =R_H 1 n_1^2 - 1 n_2^2 , the correct statements among (I) to (IV) are : (I) As...