Chemistry questions
29404 published questions with worked solutions.
- Millimoles of calcium hydroxide required to produce 100 mL of the aqueous solution of pH 12 is x 10^ -1 . The value of x is...
- Solid Lead nitrate is dissolved in 1 litre of water. The solution was found to boil at 100.15°C. When 0.2 mol of NaCl is added to...
- Water decomposes at 2300 K H_2O(g) H_2(g)+ 1 2 O_2(g) The percent of water decomposing at 2300 K and 1 bar is __________ (Nearest...
- The number of molecules or ions from the following, which do not have odd number of electrons are __________. (A) NO_2 (B)...
- The sum of bridging carbonyls in W(CO)_6 and Mn_2(CO)_ 10 is__________.
- Following chromatogram was developed by adsorption of compound 'A' on a 6 cm TLC glass plate. Retardation factor of the compound...
- Consider the following reaction approaching equilibrium at 27°C and 1 atm pressure A + B + D (k_f=10^3, k_r=10^2) The standard...
- 17 mg of a hydrocarbon (M.F. C_ 10 H_ 16 ) takes up 8.40 mL of the H_2 gas measured at 0°C and 760 mm of Hg. Ozonlysis of the...
- Match List-I with List-II. List-I (Complexes): A. [Ni(CO)_4] B. [Cu(NH_3)_4]^ 2+ C. [Fe(NH_3)_6]^ 2+ D. [Fe(H_2O)_6]^ 2+ List-II...
- The most stable carbocation for the following is : (four aniline-type carbocation resonance structures a,b,c,d)
- The wave function ( ) of 2s is given by _ 2s = 1 2 2 ( 1 a_0 )^ 1/2 (2- r a_0 )e^ -r/2a_0 At r = r_0, radial node is formed,...
- Bond dissociation energy of "E-H" bond of the "H_2E" hydrides of group 16 elements (given below), follows order. A. O B. S C. Se...
- Match List-I with List-II. List-I (Mixture): A. CHCl_3+C_6H_5NH_2 B. C_6H_ 14 +C_5H_ 12 C. C_6H_5NH_2+H_2O D. Organic compound in...
- Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A :...Not in JEE Main or NEET syllabus
- Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A :...
- Maximum number of electrons that can be accommodated in shell with n = 4 are :
- Given below are two statements : Statement I : During Electrolytic refining, the pure metal is made to act as anode and its...Not in JEE Main or NEET syllabus
- Decreasing order towards S_N1 reaction for the following compounds is (four chlorobenzyl compounds with NO2, OMe, Cl, Cl...
- The correct order of pK_a values for the following compounds is (four phenol derivatives a,b,c,d with N, NO2, cyclohexyl...
- Formulae for Nessler's reagent is