Chemistry questions
29404 published questions with worked solutions.
- Match the LIST-I with LIST-II List-I (Name of amino acid): A. Arginine B. Aspartic acid C. Lysine D. Glutamic acid List-II (One...
- Identify the colour of compound 'X' in the sequence of the reaction. (Phenolphthalein synthesis: phenol + phthalic anhydride,...
- According to Lewis theory, the total number of σ bond-pairs and lone pair of electrons around the central atom of XeO₆⁴⁻ ion is...
- 2.0 g of a bromo hydrocarbon (X) was subjected to Carius analysis, gave 3.36 g of AgBr. The percentage of carbon in the compound...
- The pH of a solution obtained by mixing 5 mL of 0.1 M NH₄OH solution with 250 mL of 0.1 M NH₄Cl solution is _______ × 10⁻²....
- A non-volatile, non-electrolyte solid solute when dissolved in 40 g of a solvent, the vapour pressure of the solvent decreased...
- The correct order of total number of atoms present in (A) 2 moles of cyclohexane (B) 684 g of sucrose (C) 90.8 L of dihydrogen at...
- The species having identical radii according to the Bohr's theory are: A. H (first orbit) B. He⁺ (first orbit) C. He⁺ (Second...
- At 27°C, 0.1 M, 1 L K₄[Fe(CN)₆] aqueous solution and 0.1 M, 1 L FeCl₃ aqueous solution are placed in a container separated by a...
- 20 mL of a solution of acetic acid required 28.4 mL of 0.1 M NaOH for its neutralization. A solution (X) was prepared by mixing...
- Match the LIST-I with LIST-II List-I (Reaction): A. Williamson Synthesis, B. Friedel Craft Reaction, C. Bromination of vinyl...
- The 1st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2nd ionization enthalpy of Mg is...
- The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT...
- Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number: Eu-63, Gd-64, Dy-66,...
- Consider the metal complexes [Ni(en)₃]²⁺ (A), [NiCl₄]²⁻ (B) and [Ni(NH₃)₆]²⁺ (C). Choose the CORRECT option by considering the...
- Consider the following molecules/species: (x) tropone, (y) acetone, (z) acetate ion. The correct order of carbon–oxygen double...
- Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with...
- The following two wedge–dash structures of a carbon bearing Br, Cl, Me and CH₃ are:
- The descending order of acidity among the following compounds is: A. Phenol, B. 4-nitrophenol, C. 4-methoxyphenol, D....
- The strongest conjugate acid will result from: