Chemistry questions
29404 published questions with worked solutions.
- Match List-I with List-II List-(process): (a) Deacron's process (b) Contact process (c) Cracking of hydrocarbons (iii) (d)...Not in JEE Main or NEET syllabus
- The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid...
- The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :Not in JEE Main or NEET syllabus
- AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory,...
- In order to prepare a buffer solution of pH 5.74 sodium acetate is added to acetic acid. If the concentaration of acetic acid in...
- 2NO(g)+Cl_2(g) 2NOCl(s). This reaction was studied at –10°C and the following data was obtained. [NO]₀ and [Cl2]₀ are the initial...
- For the reaction C_2H_6 C_2H_4+H_2 the reaction enthalpy rH = ———— kJ mol^ -1 [Given : Bond enthalpies in kJ mol^ -1 : C–C : 347,...
- ———— grams of 3-Hydroxy propanal (MW=74) must be dehydrated to produce 7.8 g of acrolein (MW = 56) (C_3H_4O) if the percentage...
- The total number of unpaired electrons present in the complex K_3[Cr(oxalate)_3] is ——.
- 2 molal solution of a weak acid HA has a freezing point of 3.885ºC. The degree of dissociation of this acid is —— 10^ -3 . (Round...
- For the reaction 2Fe^ 3+ (aq)+2I^-(aq) 2Fe^ 2+ (aq)+I_2(s) the magnitude of standard molar free energy change, _rG_m^0 = ———— kJ...
- The single largest industrial application of dihydrogen isNot in JEE Main or NEET syllabus
- Consider two chemical reactions (A) and (B) that take place during metallurgical process : (A) ZnCO_3(s) ZnO(s)+CO_2(g) (B)...Not in JEE Main or NEET syllabus
- A solution is 0.1 M in Cl^- and 0.001 M in CrO_4^ 2- . Solid AgNO_3 is gradually added to it. Assuming that the addition does not...
- Spin only magnetic moment of an octahedral complex of Fe^ 2+ in the presence of a strong field ligand in BM is :
- Which one of the following statements is not true about enzymes ?
- The hybridisations of the atomic orbitals of nitrogen in NO_2^-, NO_2^+ and NH_4^+ respectively are:
- Bakelite is a cross-linked polymer of formaldehyde and :Not in JEE Main or NEET syllabus
- In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :
- For a given chemical reaction A B at 300 K, the free energy change is –49.4 kJ mol^ -1 and the enthalpy of reaction is 51.4 kJ...