Chemistry questions
29404 published questions with worked solutions.
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A :...
- The orbital having two radial as well as two angular nodes is -
- Given below are two statements : Statement I : A mixture of chloroform and aniline can be separated by simple distillation....
- For the given reaction : A (C_4H_8Cl_2) [373K] Hydrolysis B (C_4H_8O). B reacts with Hydroxyl amine but does not give Tollen's...
- Which one of the following lanthanoids does not form MO_2? [M is lanthanoid metal]
- Given below are two statements: Statement I : o-Nitrophenol is steam volatile due to intramolecular hydrogen bonding. Statement...
- For a chemical reaction A + B C + D ( _rH^0 = 80 kJ mol^ -1 ) the entropy change _rS^0 depends on the temperature T (in K) as...
- An exothermic reaction X Y has activation energy 30 kJ mol^ -1 . If energy change during the reaction is –20 kJ, then the...
- Consider the following reaction MnO_4^-+8H^++5e^- Mn^ 2+ +4H_2O, E^0 = 1.51 V. The quantity of electricity required in Faraday to...
- A homogeneous ideal gaseous reaction AB_ 2(g) A_ (g) +2B_ (g) is carried out in a 25 litre flask at 27°C. The initial amount of...
- Dichromate ion is treated with base, the oxidation number of Cr in the product formed is______.
- 224 mL of SO_2(g) at 298 K and 1 atm is passed through 100 mL of 0.1 M NaOH solution. The non-volatile solute produced is...
- 3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at 1 atm and 300...Not in JEE Main or NEET syllabus
- Number of bridging CO ligands in [Mn_2(CO)_ 10 ] is________.
- If a rocket runs on a fuel (C_ 15 H_ 30 ) and liquid oxygen, the weight of oxygen required and CO_ 2 released for every litre of...
- Consider the following pairs of electrons (A) (a) n = 3, l = 1, m_ l = 1, m_ s = + 1 2 and (b) n = 3, l = 2, m_ l = 1, m_ s = + 1...
- Match List-I with List-II : List-I: (A) [PtCl_ 4 ]^ 2- (B) BrF_ 5 (C) PCl_ 5 (D) [Co(NH_ 3 )_ 6 ]^ 3+ List-II: (I) sp^ 3 d (II)...
- For a reaction at equilibrium A(g) B(g) + 1 2 C(g), the relation between dissociation constant (K), degree of dissociation ( )...
- Given below are two statements: Statement I : Emulsion of oil in water are unstable and sometimes they separate into two layers...Not in JEE Main or NEET syllabus
- Given below are the oxides : Na_ 2 O, As_ 2 O_ 3 , N_ 2 O, NO and Cl_ 2 O_ 7 . Number of amphoteric oxides is: