Chemistry questions
29404 published questions with worked solutions.
- The element that can be refined by distillation is :Not in JEE Main or NEET syllabus
- The correct match between Item-I and Item-II : Item-I: (a) Natural rubber (b) Neoprene (c) Buna-N (d) Buna-S Item-II: (I) 1,...Not in JEE Main or NEET syllabus
- Mischmetal is an alloy consisting mainly of:
- Reaction of an inorganic sulphite X with dilute H_2SO_4 generates compound Y. Reaction of Y with NaOH gives X. Further, the...
- Match the following : List-I: (i) Lucas Test (ii) Dumas method (iii) Kjeldahl's method (iv) Hinsberg Test List-II: (a)...
- For the given cell ; Cu(s)|Cu^ 2+ (C_1M)||Cu^ 2+ (C_2M)|Cu(s) change in Gibbs energy ( G) is negative, if :
- A crystal is made up of metal ions 'M1' and 'M2' and oxide ions. Oxide ions form a ccp lattice structure. The cation 'M1'...Not in JEE Main or NEET syllabus
- For a d^4 metal ion in an octahedral field, the correct electronic configuration is :
- The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is : Item-I: (I)...
- A set of solutions is prepared using 180 g of water as a solvent and 10 g of different non-volatile solutes A, B and C. The...
- For a reaction, 4M(s)+nO_2(g) 2M_2O_n(s) , the free energy change is plotted as a function of temperature. The temperature below...
- For Freundlich adsorption isotherm, a plot of log (x/m) (y-axis) and log p (x-axis) gives a straight line. The intercept and...Not in JEE Main or NEET syllabus
- A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass percentage of...
- If the solubility product of AB_2 is 3.20 10^ -11 M^3, then the solubility of AB_2 in pure water is________ 10^ -4 mol L ^ -1 ....
- The rate of a reaction decreased by 3.555 times when the temperature was changed from 40°C to 30°C. The activation energy (in kJ...
- The atomic number of Unnilunium is _____.
- Match List I with List II. List-I: (Molecule) (A) ethane (B) ethene (C) carbon molecule, C_2 (D) ethyne List-II: (Number and...
- Given below are two statements : Statement I : Both [Co(NH_3)_6]^ 3+ and [CoF_6]^ 3- complexes are octahedral but differ in their...
- Match List I with List II. List-I: (Compound) (A) NH_3 (B) BrF_5 (C) XeF_4 (D) SF_6 List-II: (Shape/geometry) (I) Trigonal...
- Arrange the following elements in increasing order of first ionization enthalpy: Li, Be, B, C, N Choose the correct answer from...