Explanation

Colligative properties are properties of solutions that depend on the number of solute particles in a given amount of solvent and not on the nature of the solute particles.

The four main colligative properties are:

• Vapor Pressure Lowering
• Boiling Point Elevation
• Freezing Point Depression
• Osmotic Pressure

Explanation

When HCl is added to aqueous H₂S, the increased H+ concentration causes a shift in the equilibrium of H₂S ionization

Leading to a decrease in the ionization of H₂S due to the common ion effect

Explanation

The body-centered cubic (BCC) unit cell is one of the common arrangements of atoms in crystalline solids. In this structure:

• Eight particles are located at the corners of the cube.
• One particle is situated in the center of the cube.

Explanation

The plasma in the Earth's ionosphere typically has temperatures ranging from about 1000°C to 2000°C

but it can be higher during periods of increased solar activity

Explanation

In decolorization, particularly in purifying substances like sugar or organic compounds, animal charcoal (also known as bone char) is often used for its adsorptive properties.

The boiling of animal charcoal with hot water serves several purposes:

• Activation
• Removal of Soluble Impurities
• Enhancing Adsorption

The general steps involved in the decolorization process with animal charcoal include:

• Preparation
  
• Mixing
• Adsorption
• Filtration
• Recovery

Explanation

The substance used to absorb carbon dioxide gas in combustion analysis is 50% KOH (potassium hydroxide)

50% KOH (potassium hydroxide):

Potassium hydroxide is used to absorb CO (_2) because it reacts with CO (_2) to form potassium carbonate (K(_2 )CO (_3) and potassium bicarbonate (KHCO (_3)).

This makes it an effective absorbent for CO(_2) in combustion analysis.

[ 2KOH + CO_2 rightarrow K_2CO_3 + H_2O ]

 [ KOH + CO_2 rightarrow KHCO_3 ]

Explanation

The central layer is made very thin and lightly doped as compared with the two outer layers and is called the base.

The outer sections are called emitter and collector.

Explanation

Remember that water has 2 lone pairs on oxygen.

Hence, according to VSEPR theory, the water molecule arrives at a bent or a V-shape

Due to the presence of lone pair-lone pair, lone pair-bond pair and bond pair-bond pair repulsions

Explanation

The molality (m) of a solution is the moles of solute divided by the kilograms of solvent. A solution that contains 1.0mol of NaCl dissolved into 1.0kg of water is a "one-molal" solution of sodium chloride.

The symbol for molality is a lower-case m written in italics.

Explanation

A black body is both an ideal absorber and an ideal radiator of radiation.

It absorbs all incident radiation perfectly and emits radiation at the maximum possible rate for any given temperature.