Chemistry questions
29404 published questions with worked solutions.
- The correct order of the first ionization enthalpies is:
- For the reaction, 2SO_2(g) + O_2(g) ⇌ 2SO_3(g), ΔH = −57.2 kJ mol^ -1 and K_C = 1.7 10^ 16 . Which of the following statement is...
- The difference between ΔH and ΔU (ΔH − ΔU), when the combustion of one mole of heptane (l) is carried out at a temperature T, is...
- The pH of a 0.02 M NH_4Cl solution will be [given K_b(NH_4OH) = 10^ -5 and log 2 = 0.301]
- Which of these factors does not govern the stability of a conformation in acyclic compounds?
- The correct statements among (a) to (d) are: (a) saline hydrides produce H_2 gas when reacted with H_2O. (b) reaction of LiAlH_4...Not in JEE Main or NEET syllabus
- The increasing order of nucleophilicity of the following nucleophiles is: (a) CH_3CO_2^ (b) H_2O (c) CH_3SO_3^ (d) O H
- Air pollution that occurs in sunlight is:Not in JEE Main or NEET syllabus
- Identify the pair in which the geometry of the species is T-shape and square pyramidal, respectively
- In hydrogen azide, the bond orders of bonds (I) and (II) are _______. H - N (I) ---- N (II) ---- N
- For Na^+, Mg^ 2+ , F^- and O^ 2- ; the correct order of increasing ionic radii is:
- The correct match between items of List-I and List-II is: List-I: (i) Coloured impurity (ii) Mixture of o-nitrophenol and...
- The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is :Not in JEE Main or NEET syllabus
- Which of the following statements about colloids is false?Not in JEE Main or NEET syllabus
- In graphite and diamond, the percentage of p-character of the hybrid orbitals in hybridisation are respectively:
- The minimum volume of water required to dissolve 0.1 g lead (II) chloride to get a saturated solution (K_ sp of PbCl_2 = 3.2 10^...
- The decreasing order of bond angles in BF_3, NH_3, PF_3, and I_3^- is :
- Xenon hexafluoride on partial hydrolysis produces compounds 'X' and 'Y'. Compounds 'X' and 'Y' and the oxidation state of Xe are...
- A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is...
- In KO_2, the nature of oxygen species and the oxidation state of oxygen atom are, respectively :