Chemistry questions
29404 published questions with worked solutions.
- Molarity (M) of an aqueous solution containing x g of anhyd. CuSO₄ in 500 mL solution at 32 °C is 2 × 10⁻¹ M. Its molality will...
- The total number of species from the following in which one unpaired electron is present, is ________. N₂, O₂, C₂⁻, O₂⁻, O₂²⁻,...
- Number of ambidentate ligands among the following is ________. NO₂⁻, SCN⁻, C₂O₄²⁻, NH₃, CN⁻, SO₄²⁻, H₂O
- Total number of essential amino acid among the given list of amino acids is ________. Arginine, Phenylalanine, Aspartic acid,...
- Number of colourless lanthanoid ions among the following is ________. Eu³⁺, Lu³⁺, Nd³⁺, La³⁺, Sm³⁺
- Which structure of protein remains intact after coagulation of egg white on boiling?
- Choose the correct option having all the elements with d¹⁰ electronic configuration from the following :
- Given below are two statements : Statement (I) : Oxygen being the first member of group 16 exhibits only –2 oxidation state....
- The molecular formula of second homologue in the homologous series of mono carboxylic acids is ____.
- The incorrect statement regarding conformations of ethane is:
- The technique used for purification of steam volatile water immiscible substances is:
- Which of the following cannot function as an oxidising agent?
- Phenolic group can be identified by a positive:
- Given below are two statements: Statement (I) : In the Lanthanoids, the formation Ce⁺⁴ is favoured by its noble gas...
- Which of the following statements is not correct about rusting of iron?
- Time required for completion of 99.9% of a First order reaction is ____ times of half life (t₁/₂) of the reaction.
- 9.3 g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide...
- Volume of 3 M NaOH (formula weight 40 g mol⁻¹) which can be prepared from 84 g of NaOH is ____ × 10⁻¹ dm³.
- The number of non-polar molecules from the following is ____. HF, H₂O, SO₂, H₂, CO₂, CH₄, NH₃, HCl, CHCl₃, BF₃
- For a certain thermochemical reaction M → N at T = 400 K, ΔH° = 77.2 kJ mol⁻¹, ΔS = 122 JK⁻¹, log equilibrium constant (log K) is...