Chapter 1: Concepts of Chemistry

The systematic, orderly and continuous effort of mankind to manipulate nature for their own betterment is called—

Which of the following is one of the major branches of science?

The branch of science which deals with the composition, structure, properties, uses and mutual conversion of substances is—

During the conversion of matter, mainly which form of energy is absorbed and emitted?

The branch of science that discusses the structure of matter, its nature and changes is called—

Which of the following statements about chemistry is correct?

According to the information available so far, the first metal used by humans is—

Which of the following is NOT a metal that humans have used since ancient times?

Bronze is an alloy of copper and which other metal?

Around which year did humans learn to make bronze?

Bronze was used in the ancient days for which of the following?

Which of the following alloys, like bronze, is mentioned as still being used by people for various purposes?

The discovery of bronze contributed mainly to the progress of—

The Greek philosopher Democritus declared the existence of an indivisible particle called atom in—

The Indian philosopher who expressed the same idea of an indivisible particle around the time of Democritus was—

Who opposed the idea of the atom and believed all matters are made of soil, fire, water and wind?

According to Aristotle and some other philosophers, all matters are made of—

In medieval times, who were the philosophers that tried to make gold from cheaper materials and an elixir for long life?

The earliest attempts of systematic chemical experimentation by Arab philosophers was called—

The term 'Alchemy' originates from the Arabic word—

The word 'chemistry' is derived from which root word?

Who is known as the first scientist to carry out chemical experiments in a laboratory and is sometimes called the father of chemistry?

According to Jabir Ibn Hayyan, all matters are composed of—

Who is called the father of modern chemistry?

Which of the following is NOT among the first school of scientists who explored the mystery of chemistry?

A green mango tastes sour mainly due to the presence of—

As a green mango ripens, the organic acids transform into—

The change that occurs while a mango ripens is mainly a—

The main component of kerosene, natural gas and wax is—

Hydrocarbon is a composite form of—

When kerosene, natural gas or wax is burnt, hydrocarbon reacts with which gas of the air?

Burning of kerosene, natural gas and wax produces all of the following EXCEPT—

Stomach acidity is caused due to excess generation of which acid?

Antacid contains which two compounds that neutralize hydrochloric acid?

The reaction between antacid and hydrochloric acid in the stomach is essentially a—

According to the textbook, "Wherever there are matters or substances, there is—

Earth was highly heated at the time of its creation. The creation of atmosphere, water and other elements took—

Each living body works as a kind of—

The two main gases of the air mentioned in the table of scopes are—

When we breathe in, oxygen reacts with the decomposed food inside the body to produce—

In the breathing reaction, the intensity of the reaction is regulated through the control of—

Which of the following plays the role of a solvent for various substances inside the body?

The poisonous substances of the body mix with water and come out in the form of—

The main cause of death of people in cholera is—

Which mineral salts are mentioned as playing a vital role for our body?

The main components of plant food are—

Plants collect nitrogen, phosphorus, calcium, magnesium and potassium from the—

Different fertilizers act as—

Paper is one of the most significant inventions of human civilization and is mainly composed of—

Which of the following are mentioned as raw materials for paper because of their cellulose content?

Photosynthesis is basically a—

In photosynthesis, plants take in carbon dioxide from the air with the help of their—

In photosynthesis, water is collected by the plant from the soil through its—

The chlorophyll of green parts of a plant produces glucose through the reaction between—

Animal bodies digest carbohydrates and proteins to produce—

The relationship between chemistry and biology is established because—

The battery used for getting electricity is a contribution of—

Energy gleaned by burning oil, gas or coal is the source for—

The branch of chemistry whose theories are essentially dependent on theories and formulas of physics is—

Nuclear physics and which branch of chemistry are intertwined?

Mathematics is used in chemistry mainly for—

Which of the following is NOT given as an example of mathematical use in chemistry?

Which of the following everyday items mentioned in the chapter is NOT a contribution of chemistry?

Why are fertilizers used in fields?

Insecticides are used to—

Preservatives are used to—

Which of the following diseases, once killer, are now curable thanks to chemistry?

Which recent disease is mentioned as one from which humans have been relieved with the help of chemistry?

Many people are now cured even of which serious disease through advanced medicine?

Which of the following is NOT mentioned as a chemical waste harmful to the environment?

Which of the following heavy metals is mentioned as harmful chemical waste?

Excess insecticide that gets washed away pollutes—

Studying chemistry helps us realize—

The aim of science is the—

Knowledge gleaned out of systematic experimentation is called—

The process to glean knowledge by experimenting is known as—

One who carries out research is a—

The first step in a chemistry research is—

The second step in chemistry research, where you read books or articles to learn how others have carried out similar experiments, is—

In the experiment with ammonium chloride, what is the probable result you can predict from background research on calcium oxide?

When calcium oxide is dissolved in water, it—

Which of the following pieces of equipment is NOT mentioned as required for the ammonium chloride experiment?

In the ammonium chloride experiment, the volume of water taken in the beaker is—

The initial temperature of water in the ammonium chloride experiment is—

After dissolving $5$ g of ammonium chloride in $250$ mL water, the temperature drops to—

After dissolving a total of $15$ g of ammonium chloride in the water, the temperature becomes—

The conclusion drawn from the ammonium chloride experiment is that ammonium chloride—

As more ammonium chloride is dissolved in water, the temperature of the water—

The room or place where scientific experiments are carried out is called the—

Most of the apparatus used in a chemistry laboratory are made of—

Almost all chemicals are harmful to some extent for—

The colour of the laboratory apron should be—

The length of the laboratory apron should be—

The sleeves of the laboratory apron should reach up to the—

Which of the following is NOT a recommended item for self-protection in a chemistry laboratory?

The "Globally Harmonized System" of hazard signs has been introduced by the—

The Globally Harmonized System uses specific pictograms to indicate the—

Friction and fire in which category of substances may cause serious explosion?

Which of the following is an example of an explosive substance?

Which of the following pairs are flammable substances?

Flammable substances must be kept away from—

Benzene, chlorobenzene and methanol are examples of—

Cement dust, light acids, base and nitrous oxide are mentioned as substances that cause—

Which of the following pairs are mentioned as substances that may cause cancer or long term harm?

Which of the following is a radioactive element?

Uranium and radium emit harmful rays which may cause—

Which of the following substances are dangerous for the environment?

Substances that are dangerous for the environment should be—

Hydrochloric acid, sulphuric acid and concentrated sodium hydroxide are examples of—

Inhalation of corrosive substances may cause—

In the process of chemical research—

Which of the following are scientists who are part of the first school to explore the mystery of chemistry?

Chemistry is related to other branches of science because—

The harmful effects of chemicals on the environment include—

Safety items used in a chemistry laboratory include—

Examples of chemistry in everyday life include—

The two main gases in the air that participate in chemical reactions inside our body are—

Which of the following are GHS pictogram categories described in the chapter?

In the ammonium chloride experiment—

The Greek philosopher Democritus and the Indian philosopher Kanada—