Chemistry questions
29404 published questions with worked solutions.
- Magnesium powder burns in air to give:Not in JEE Main or NEET syllabus
- The number of water molecule(s) not coordinated to copper ion directly in CuSO_4·5H_2O, is:
- Match the catalysts (Column I) with products (Column II). List-I: (A) V_2O_5 (B) TiCl_4/Al(Me)_3 (C) PdCl_2 (D) Iron Oxide...
- C_ 60 , an allotrope of carbon contains:
- Among the following, the molecule expected to be stabilized by anion formation is: C_2, O_2, NO, F_2
- The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a solution of 0.01 M BaCl_2 in...
- The standard Gibbs energy for the given cell reaction in kJ mol^ -1 at 298 K is: Zn(s) + Cu^ 2+ (aq) → Zn^ 2+ (aq) + Cu(s), E° =...
- The element having greatest difference between its first and second ionization energies, is:
- The aerosol is a kind of colloid in which:Not in JEE Main or NEET syllabus
- The ore that contains the metal in the form of fluoride is:
- Consider the van der Waals constants, a and b, for the following gases. | Gas | Ar | Ne | Kr | Xe | |---|---|---|---|---| |...
- For a reaction, N_2(g) + 3H_2(g) → 2NH_3(g); identify dihydrogen (H_2) as a limiting reagent in the following reaction mixtures.
- Among the following, the set of parameters that represents path functions, is: (A) q + w (B) q (C) w (D) H − TS
- Which of the following statements is not true about sucrose?
- The noble gas that does not occur in the atmosphere is:
- The highest possible oxidation states of uranium and plutonium, respectively are:
- In chromatography, which of the following statements is incorrect for R_f?
- The number of pentagons in C_ 60 and trigons (triangles) in white phosphorus, respectively, are:
- For the reaction of H_2 with I_2, the rate constant is 2.5 10^ -4 dm^3 mol^ -1 s^ -1 at 327°C and 1.0 dm^3 mol^ -1 at 527°C. The...
- The correct match between Item-I and Item-II is: List-I: (a) High density polythene (b) Polyacrylonitrile (c) Novolac (d) Nylon 6...Not in JEE Main or NEET syllabus