Which of the following properties changes with valency?

Question

Question

This question was previously asked in

RRB JE CBT I - (Held On: 30 May 2019 Shift 1)

Answer 1

The correct answer is Equivalent weight

Key Points

Equivalent weight changes with valency as it is defined as the mass of one equivalent of a substance, which is dependent on the valency.
Valency affects the calculation of equivalent weight because it determines the number of moles of electrons or ions that a substance can donate or accept.
The equivalent weight is calculated using the formula: Equivalent weight = Molecular weight / Valency.
Other properties like density, volume, and pressure do not directly change with valency.

Additional Information

Valency is the combining power of an element, often defined as the number of hydrogen atoms that can combine with or displace one atom of the element to form a compound.
The concept of equivalent weight is particularly useful in the context of acid-base titrations and redox reactions.
For example, in a redox reaction, the equivalent weight of an oxidizing or reducing agent is the quantity that reacts with one mole of electrons.
In acid-base chemistry, the equivalent weight of an acid is the mass that supplies or reacts with one mole of hydrogen ions (H⁺), while for a base, it is the mass that reacts with one mole of hydroxide ions (OH^-).