Explanation

Group VB (Group 7 in modern IUPAC numbering) of transition elements includes Manganese (Mn), Technetium (Tc), and Rhenium (Re).

These elements show similar properties and lie vertically in the same group of the periodic table.

Explanation

Acetic acid is used to produce cellulose acetate, a key component in making synthetic fibers like rayon.

It acts as a solvent and reactant in the fiber manufacturing process.

Explanation

Potassium hydroxide (KOH) is used to make soft soaps, which are typically more soluble and have a lower melting point than soaps made with sodium hydroxide (NaOH).

Soft soaps are often used in liquid soaps, shampoos, and body washes.

Explanation

The flame test is a qualitative analysis technique used to identify certain elements based on the color they produce when heated in a flame.

In the case of copper halides (such as copper chloride or copper bromide), the flame test produces a bluish-green color, which indicates the presence of copper.

Explanation

Organic qualitative analysis deals with the identification of functional groups in organic compounds.

Functional groups are specific groups of atoms within a molecule that determine its chemical properties and reactivity.

Explanation

The Analytical Chemistry deals with instruments and methods to separate, identify, and quantify the matter.

Explanation

According to the Arrhenius definition, an acid is a substance that increases the H+ ion concentration in aqueous solution.

HCl, HNO3, and H2SO4 all dissociate in water to produce H+ ions, making them Arrhenius acids.

CO2 does not dissociate in water to produce H+ ions.

Explanation

• Diamond is a crystalline solid that has a sharp melting point.
• Meaning it melts at a specific temperature (around 4000 K) with a minimal range.

Explanation

• One atmospheric pressure, also known as standard atmospheric pressure.
• It is defined as 101325 Pascals (Pa).
• This is the pressure exerted by the weight of the atmosphere at sea level.
• It is used as a standard unit of pressure.

Explanation

• The diagram that shows atoms are bonded with the same electronegativity is: A -----:----- B.
• In this representation, the bond is shown with a symmetrical distribution of electrons.
• It suggesting that the atoms have the same or very similar electronegativity.