Explanation

In Bohr's model, electrons occupy specific energy levels around the nucleus.

When an electron moves from a lower energy level to a higher energy level, it absorbs energy

Conversely, when an electron moves from a higher energy level to a lower energy level, it emits energy.

This energy is emitted as a photon of light with a specific wavelength, corresponding to a specific frequency. 

Explanation

The Cannizzaro reaction is a disproportionation reaction where a non-enolizable aldehyde undergoes simultaneous oxidation and reduction.

One molecule of aldehyde is oxidized to a carboxylic acid, and another is reduced to an alcohol.

Explanation

The rate at which nitrogen is used is 0.57 mol N2.L^-1.h^-1.

Explanation

Ribose and Deoxyribose

Are isomers

• Both are monosaccharides (simple sugars) with the same molecular formula: C₅H₁₀O₅.

• Deoxyribose differs from ribose by one less oxygen atom at the 2' carbon (hence "deoxy").

• They are structural isomers (same formula, different structure).

Explanation

The dual character of matter particles in motion was postulated by De Broglie. 

Louis de Broglie proposed the idea that particles like electrons could behave not only as particles but also as waves, a concept known as wave-particle duality

Explanation

 A NiCad (Nickel-Cadmium) battery has a nickel oxide hydroxide (NiO2) cathode and a cadmium anode. 

Explanation

The quantum number that describes the shape of an electron in an atom is the azimuthal quantum number (l). 

Explanation

The functional group for a ketone is a carbonyl group (C=O), where the carbonyl carbon is bonded to two other carbon atoms.

Explanation

Anisotropy is the property of being directionally dependent, meaning the substance behaves differently when measured along different directions, such as electrical conductivity.

Explanation

The p sub-shell does not exist in the first energy level (n=1). The first energy level only has an s sub-shell.