Explanation

• Milk has a pH level of around 6.5-7, which is slightly acidic to neutral. 
• This is because milk contains lactic acid and other acidic compounds.

Explanation

• Crystallization is the process of obtaining a solid substance from a solution by allowing the solution to cool and form crystals.
• This process is used to purify substances and obtain a solid in a pure form.

Explanation

• Dew is a common outcome of condensation.
• Where water vapor in the air condenses onto surfaces.
• It forming tiny droplets of water.

Explanation

• As the number of protons (atomic number) increases, the ionization energy also increases.
• This is because the positive charge of the nucleus increases, which pulls the electrons closer to the nucleus, making it harder to remove an electron (i.e., higher ionization energy).

Explanation

• The mass spectrum of CH3Br (methyl bromide) shows two peaks at m/z values of 94 and 96, corresponding to the molecular ions [CH3Br]+.
• These peaks are due to the natural abundance of bromine isotopes, 79Br and 81Br, which are present in a ratio of approximately 3:1.
• As a result, the peak at m/z 94 ([CH379Br]+) is about 3 times more intense than the peak at m/z 96 ([CH381Br]+).
  

Explanation

The chemical formula of quick lime (commonly referred to as lime) is Calcium Oxide (CaO).

It is used in construction, steelmaking, and as a chemical reagent.

Explanation

Among the given options, n-propyl alcohol has the highest boiling point due to its linear structure allowing more hydrogen bonding.

Explanation

The blue color of a Cu²⁺ salt solution is due to the transition of electrons within the d-orbitals (from one d orbital to another, i.e., a d-d transition).

Explanation

• Citric acid is a natural preservative found in many fruits, particularly in citrus fruits like lemons, oranges, and grapefruits.
• It's responsible for their sour taste and is also used as a food additive.
• Other fruits like mangoes, grapes, and strawberries also contain citric acid, although in smaller amounts.
• The presence of citric acid gives these fruits their characteristic sour taste.

Explanation

A change in physical appearance or state of a substance, such as a change in shape, size, color, or phase (solid, liquid, gas), is called a Physical Change.