List of top Chemistry Questions

A balloon filled with an air sample occupies \( 3 \, \text{L} \) volume at \( 35^\circ \text{C} \). On lowering the temperature to \( T \), the volume decreases to \( 2.5 \, \text{L} \). The temperature \( T \) is: [Assume \( P \)-constant]

In \( \text{NO}_3^- \) ion, the number of bond pairs and lone pairs of electrons on the nitrogen atom are:
The wavelength of the radiation emitted, when a hydrogen atom electron falls from infinity to stationary state 1, would be: (Rydberg constant \( R = 1.097 \times 10^7 \, \text{m}^{-1} \))
An example of a sigma-bonded organometallic compound is:
What is the pH of a 0.01 M hydrochloric acid (HCl) solution?
Which element has the highest oxidizing potential?
Which one of the following is vinyl alcohol?
Calculate the pH of the solution using the Henderson-Hasselbalch equation.
Ortho-sulphobenzimide is used as:
What is the chemical formula of glycerol?
What is the ratio of abundance of chlorine isotopes with atomic masses 35 and 37?
What is the IUPAC name and bond length of propan-1-ol and cyclobutane?
Alkyl halide and aryl halide react in the presence of sodium metal and dry ether. The name of the reaction is?
How many lattice points are there in a Body-Centered Cubic (BCC) structure?
When ammoniacal silver nitrate reacts with organic compounds, this test is called:
How many unpaired electrons are present in the element of atomic number 27 with a +2 oxidation state?
Which of the following represents the Gattermann-Koch reaction?
The IUPAC name of the complex ion formed when gold dissolves in aqua regia is:
The relationship between solubility of a gas in a liquid at constant temperature and external pressure is:
For irreversible expansion of an ideal gas under isothermal conditions, which of the following is correct?
What is the preliminary test for nanoparticles?
The reagent used in the Etard reaction is:
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is:
What is the rate law if the rate is directly proportional to \([B]^2\) and independent of \([A]\)?
Which one of the following is used as an eye lotion?