Answer key

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Last edited 25 days ago by Learn LoopHQ.

Chapter: 01. Introduction To Chemistry

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The main function of an analgesic medicine is to reduce body pain.

Alchemists learned to make glass beads and artificial pearls.

Antoine Lavoisier discovered the significant role of oxygen in combustion and respiration.

The main purpose of fertilisers in agriculture is to provide essential nutrients to crops, helping to increase agricultural production.

A scientist is a person who has vast knowledge of Science and is engaged in scientific research.

Chemicals used in cosmetics and as food preservatives may potentially harm the skin and other body organs.

Bordeaux mixture is an example of a fungicide, used to protect crops from fungi.

Chemistry is defined as the branch of Science that deals with the study of the composition and the physical and chemical properties of various forms of matter.

Food processing is the method of combining raw food ingredients using physical and chemical techniques to create marketable and ready-to-use food products.

Michael Faraday proposed the laws of electrolysis, which describe the relationship between electricity and chemical changes.

John Dalton proposed that matter consists of small, indivisible particles called atoms.

Alchemy initially developed in Egypt and China.

Benzoic acid and sodium bisulphite are two chemical preservatives used for food.

Enzymes are chemical substances secreted in the body that help to carry out various chemical reactions necessary for bodily functions.

Nylon and polyester are two common synthetic fibres developed due to Chemistry.

Cosmetics are products used to clean, protect, and enhance the external appearance of the human body.

Insecticides are chemicals used to kill insects that harm crops.

Robert Boyle proposed Boyle’s law, which describes the behavior of gases.

Penicillin and aspirin are two commonly used medicines that are products of chemistry research.

Food processing is the method of combining raw food ingredients using physical and chemical techniques to create marketable and ready-to-use food products.

Toothpastes and soaps are two examples of everyday things made with the knowledge of Chemistry.

Chemistry contributes to transport by providing essential fuels like LPG, petrol, and diesel, which power various vehicles.

Alchemists used dyes in textiles and for painting palaces and tombs.

By the 18th century, modern Chemistry separated from alchemy, but it still owes a great deal to the processes and substances developed by alchemists.

Science is the systematic knowledge gained by humans through observations and experimentation.

Heptachlor and BHC are two specific examples of insecticides.

Hormones are chemical substances that control various activities and functions within the body.

Enzymes are chemical substances secreted in the body that help to carry out various chemical reactions necessary for bodily functions.

Henry Cavendish discovered Hydrogen.

The primary goal of alchemists related to metals was to find a magical substance that could turn iron and copper into gold.

Enzymes are chemical substances secreted in the body that help to carry out various chemical reactions necessary for bodily functions.

An antacid reduces the excessive acid in the stomach, providing relief from indigestion.

Two techniques developed by alchemists were processes to extract metals from their ores and mixing different metals to form alloys.

Ernest Rutherford discovered the nucleus of an atom and also worked on radioactivity.

Coal is primarily used for generating electricity.

Dmitri Mendeleev’s major contribution was creating the Periodic Table of elements and predicting the properties of undiscovered elements.

One harmful aspect is that the excessive use of fertilisers and pesticides can harm the environment by causing pollution.

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