GD Goenka International School PGT Chemistry Interview Questions and Answers

A demo about acid bases and salts

• Demonstrate the reaction between an acid and a base to form a salt

• Use indicators to show the change in pH during the reaction

• Explain the concept of neutralization and the formation of water as a byproduct

• Discuss the properties of acids, bases, and salts

• Show examples of common acids, bases, and salts

Salt is a compound formed by the reaction of an acid with a base. It consists of positive and negative ions and is commonly used for seasoning and preserving food.

• Salt is composed of positive ions (cations) and negative ions (anions)

• Common examples of salt include sodium chloride (table salt), potassium chloride, and calcium chloride

• Salt is formed through the reaction of an acid with a base, resulting in the neutraliza...read more

The byproduct of reacting iodine with alcohol is iodoalkane.

• When iodine reacts with alcohol, it replaces the hydrogen atom in the alcohol molecule.

• The resulting compound is called iodoalkane or alkyl iodide.

• The reaction is an example of a substitution reaction.

• For example, when iodine reacts with ethanol, the byproduct is ethyl iodide.

Aluminium reacts with the acidic content of mango pickle, leading to the formation of harmful compounds.

• Aluminium reacts with the acidic content of mango pickle

• This reaction can lead to the formation of harmful compounds

• These compounds can contaminate the pickle and make it unsafe for consumption

The structure of an element in period 14 depends on its atomic number and electron configuration.

• Elements in period 14 can have various structures depending on their atomic number.

• The structure can be determined by the electron configuration of the element.

• For example, if element X has an atomic number of 57, its structure would be [Xe] 4f^14 5d^1 6s^2.

Group 17 elements are also known as halogens.

• Group 17 elements are highly reactive nonmetals.

• They have 7 valence electrons and tend to gain 1 electron to achieve a stable octet.

• Halogens include fluorine, chlorine, bromine, iodine, and astatine.

• They are found in various compounds and play important roles in chemistry and biology.

Isoprene is the monomer for natural rubber.

• Isoprene is a 5-carbon molecule.

• It is the basic unit that polymerizes to form natural rubber.

• Natural rubber is made up of repeating isoprene units.

• Isoprene is a key building block in the production of rubber products.

The size of a nucleus is extremely small compared to the overall size of an atom.

• The size of a nucleus is typically on the order of femtometers (10^-15 meters)

• The nucleus makes up a very small fraction of the total volume of an atom

• The size of a nucleus can vary depending on the element, with heavier elements having larger nuclei