Chemistry questions
29404 published questions with worked solutions.
- For an electrochemical cell Sn(s)|Sn^ 2+ (aq, 1M)||Pb^ 2+ (aq, 1M)|Pb(s) the ratio [ Sn^ 2+ ] [ Pb^ 2+ ] when this cell attains...
- Cast iron is used for the manufacture of :Not in JEE Main or NEET syllabus
- Two compounds A and B with same molecular formula ( C_3H_6O ) undergo Grignard's reaction with methylmagnesium bromide to give...
- The shape/structure of [ XeF_5 ]^- and XeO_3F_2 , respectively, are :
- The major product obtained from E_2-elimination of 3-bromo-2-fluoropentane is :
- Three elements X, Y and Z are in the 3rd period of the periodic table. The oxides of X, Y and Z, respectively, are basic,...
- The number of subshells associated with n = 4 and m = –2 quantum numbers is :
- 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...
- Molality (m) of 3 M aqueous solution of NaCl is: (Given: Density of solution = 1.25 g mL⁻¹, Molar mass in g mol⁻¹: Na-23, Cl-35.5)
- The incorrect statements regarding enzymes are: (A) Enzymes are biocatalysts. (B) Enzymes are non-specific and can catalyse...