Explanation

The complexometric titration using EDTA (Ethylenediaminetetraacetic acid) as a titrant is not suitable for titrating Xe (xenon) since xenon does not form stable complexes with EDTA.

Explanation

• Among the given options, the process of tautomerism is exemplified by the first reaction: CH3COOH + C2H5OH ⇌ CH3COOC2H5 + H2O.
• Tautomerism involves the rearrangement of bonds within a molecule, resulting in the formation of structural isomers called tautomers, which readily interconvert.
• In this reaction, the acetic acid (CH3COOH) and ethanol (C2H5OH) undergo tautomerism to form ethyl acetate (CH3COOC2H5) and water (H2O).

Explanation

Hess's law states that the total enthalpy change of a reaction is the same, regardless of the number of steps in which the reaction occurs, allowing ∆H to be measured indirectly.

Explanation

The noble-gas notation [Kr] is for krypton, and Zr (Zirconium) follows krypton in the periodic table with the configuration 5s², 4d².

Explanation

The Zeeman effect refers to splitting spectral lines when atoms are subjected to a magnetic field.

Explanation

A single chlorine-free radical (Cl•) can destroy up to 100,000 ozone (O₃) molecules. This significant impact on ozone is due to the catalytic nature of chlorine in the ozone depletion process.

Explanation

• In a gas, the particles have no regular pattern and have large empty spaces between them.
• The particles are widely spaced and are free to move in any direction, with no fixed position or arrangement.

Explanation

When you put sand, salt, and sawdust in a glass of water, the following things happen:

• Salt dissolves in water, meaning it breaks down into individual particles that are distributed evenly throughout the water.
• Sand sinks to the bottom of the glass, because it is denser than water and cannot float or dissolve in it.
• Sawdust floats on top of the water, because it is less dense than water and is able to remain suspended on the surface.

Explanation

• Lemons contain citric acid, which is a naturally occurring compound that gives lemons their characteristic sour taste.
• Citric acid is a weak organic acid that is found in many fruits, including lemons, oranges, and grapefruits.
• It is responsible for the tartness and acidity of these fruits.

Explanation

Elements having zero nuclear spin cannot be directly determined by NMR (Nuclear Magnetic Resonance) spectroscopy because NMR relies on the detection of signals from nuclei with non-zero nuclear spin.