Chemistry questions
29404 published questions with worked solutions.
- Match List-I with List-II. List-I: A. Physisorption B. Chemisorption C. N_2(g)+3H_2(g) Fe(s) 2NH_3(g) D. Analytical Application...Not in JEE Main or NEET syllabus
- The rate constant for a first order reaction is 20 min^ -1 . The time required for the initial concentration of the reactant to...
- The resistivity of a 0.8 M solution of an electrolyte is 5 10^ -3 . Its molar conductivity is ____________ 10^4 ^ -1 cm^2mol^ -1...
- If the CFSE of [Ti(H_2O)_6]^ 3+ is –96.0 kJ/mol, this complex will absorb maximum at wavelength ________nm. (Nearest integer)...
- Assume carbon burns according to following equation : 2C_ (s) +O_ 2(g) 2CO(g) When 12 g carbon is burnt in 48 g of oxygen, the...
- The number of alkali metal(s), from Li, K, Cs, Rb having ionization enthalpy greater than 400 kJ mol^ -1 and forming stable...Not in JEE Main or NEET syllabus
- A sample of a metal oxide has formula M_ 0.83 O_ 1.00 . The metal M can exist in two oxidation states +2 and +3. In the sample of...
- Amongst the following, the number of species having the linear shape is ________. XeF_2, I_3^-, C_3O_2, I_3^-, CO_2, SO_2, BeCl_2...
- Enthalpies of formation of CCl_4(g), H_2O(g), CO_2(g) and HCl(g) are –105, –242, –349 and –92 kJ mol^ -1 respectively. The...
- At 298 K, the solubility of silver chloride in water is 1.434 10^ -3 g L^ -1 . The value of - K_ sp for silver chloride is...
- Cobalt chloride when dissolved in water forms pink coloured complex X which has octahedral geometry. This solution on treating...
- Adding surfactants in non polar solvent, the micelles structure will look likeNot in JEE Main or NEET syllabus
- Which one of the following statements is correct for electrolysis of brine solution?
- Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from n = 4 to n = 2 of...
- Match List-I with List-II : List-I: A. XeF_4 B. SF_4 C. NH_4^+ D. BrF_3 List-II: I. See-saw II. Square planar III. Bent T-shaped...
- H_2O_2 acts as a reducing agent in :
- Identify X, Y and Z in the following reaction. (Equation not balanced) ClO^ +NO_2 X H_2O Y+Z
- The correct increasing order of the ionic radii is :
- Match items of columns I and II List I (Mixture of compounds): A. H_2O/CH_2Cl_2 B. (nitro-naphthol/naphthalene mixture) C....
- Choose the correct set of reagents for the following conversion. trans(Ph – CH = CH – CH_3) (Ph – CH = CH – CH_3)