Chemistry questions
29404 published questions with worked solutions.
- Henry's constant (in kbar) for four gases , , and in water at 298 K is given below : | | | | | | |---|---|---|---|---| | K_H | 50...
- Of the species, NO, NO^+ , NO^ 2+ and NO^- , the one with minimum bond strength is-
- Which one of the following compounds possesses the most acidic hydrogen ?
- The atomic number of the element unnilennium is-
- Glycerol is separated in soap industries by-
- If the boiling point of H_2O is 373 K, the boiling point of H_2S will be-
- Tyndall effect is observed when-Not in JEE Main or NEET syllabus
- The mechanism of S_N1 reaction is given as : R - X R^ X^ R^ ||X^ Y^ R - Y+X^ (Ion pair → Solvent separated ion pair) A student...
- The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products ? (a) nitrobenzene Sn/HCl (b)...
- Let C_ NaCl and C_ BaSO_4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO_4 , respectively,...
- In a molecule of pyrophosphoric acid, the number of P – OH, P = O and P – O – P bonds/moiety (ies) respectively are :
- The mole fraction of glucose ( C_6H_ 12 O_6 ) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the...
- The volume strength of 8.9 M H_2O_2 solution calculated at 273 K and 1 atm is _______. (R = 0.0821 L atm K ^ -1 mol ^ -1 )...
- The total number of monohalogenated organic products in the following reaction (including stereoisomers) is _________ . A...
- The photoelectric current from Na (work function, w_0 = 2.3 eV) is stopped by the output voltage of the cell Pt(s) | H_2 (g, 1...
- An element with molar mass 2.7 10^ -2 kg mol ^ -1 forms cubic unit cell with edge length 405 pm. If its density is 2.7 10^3 kg m...Not in JEE Main or NEET syllabus
- Combustion of glucose (C₆H₁₂O₆) produces CO₂ and water. The amount of oxygen (in g) required for the complete combustion of 900 g...
- Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The stability...
- Match List I with List-II List-I (Name of the test): A. Borax bead test B. Charcoal cavity test C. Cobalt nitrate test D. Flame...
- Match List I and with List II List-I (Molecule): A. NH₃ B. BrF₅ C. PCl₅ D. CH₄ List-II (Shape): I. Square pyramid II. Tetrahedral...