Chemistry is the science that explores what everything around us is made of and how these things interact with each other. It’s like understanding the secret language of substances! Imagine everything you touch, see, or smell—the air you breathe, the water you drink, the food you eat—all made up of tiny particles called atoms and molecules.

These atoms are the building blocks of everything. They join together in different ways, forming various substances. Chemistry helps us understand these combinations, explaining why some things are solid, like a table, while others, like air, are gases that we can’t see.

One fascinating part of chemistry is how substances change. Take water, for example. It can turn from a liquid to a solid when frozen, or to a gas when heated. Chemistry helps us understand why these changes happen and how different elements and compounds behave under various conditions.

Chemistry isn’t just about mixing chemicals in a lab; it’s everywhere! It explains the colors in flowers, the way medicines work in our bodies, how food cooks, and even how our phones and computers function.

It’s like solving puzzles—learning about the properties of different substances and how they interact. Chemistry isn’t only for scientists; it’s for everyone curious about the world around them.

So, next time you see a flame, mix ingredients in the kitchen, or simply breathe in the fresh air, remember that chemistry is at play, making the world an exciting and ever-changing place!

Question Answers

What is the second most abundant metal in the earth’s crust?

Answer: Iron.

What alloy is used in making heating elements for electric heating devices?

Answer: Nichrome.

Which element is found on the surface of the moon?

Answer: Titanium.

What does the radioactive disintegration of uranium ultimately result in?

Answer: Lead.

Which variety of glass is heat resistant?

Answer: Pyrex glass.

Which synthetic fiber is known as artificial silk?

Answer: Rayon.

Which fertilizer has a higher nitrogen content?

Answer: Urea.

Which is the essential element in all organic compounds?

Answer: Carbon.

What substance is coated on plastic tape?

Answer: Iron oxide.

What is used in the welding industry?

Answer: Acetylene.

Which element is found in the largest amount of rocks and minerals?

Answer: Silicon.

What is used as a material for making protective windows in space probes?

Answer: Diamond.

What coats non-stick cooking utensils?

Answer: Teflon.

Which substance is a poor conductor of electricity but a good conductor of heat?

Answer: Mica.

Which gas is the most unreactive?

Answer: Hydrogen.

What are ‘IC chips’ for computers usually made of?

Answer: Silicon.

How is the green flame produced in fireworks?

Answer: Because of barium.

How is an element best characterized?

Answer: By its atomic number.

What produces a hissing sound when dissolved in water?

Answer: Limestone.

What are Rubies and Sapphires chemically known as?

Answer: Aluminium oxide.

Which material is suitable for water purification?

Answer: Zeolites.

Which glass is used in bulletproof screens?

Answer: Reinforced glass.

What is used in preparing matchsticks?

Answer: Red phosphorus.

Which type of glass can block ultraviolet rays?

Answer: Crookes glass.

What are Contact lenses made from?

Answer: Lucite.

Which polymer is utilized for making bulletproof material?

Answer: Polyethylene.

What major component is employed in the preparation of various types of glasses?

Answer: Silica.

What would you introduce into pure water to allow an electric current to pass through it?

Answer: Lemon Juice.

With which physicist is the term ‘Boson’ associated?

Answer: S.N. Bose.

What gases constitute cooking gas?

Answer: Butane and propane.

Which metal is the most abundant in the Earth’s crust?

Answer: Aluminium.

Which metal is present in photo films?

Answer: Silver.

Which element does not occur naturally but can be produced artificially?

Answer: Plutonium.

In vulcanization, what is natural rubber heated with?

Answer: Sulphur.

What chemical is used as a ‘fixer’ in photography?

Answer: Sodium thiosulphate.

What substance does not adhere to the walls of a glass vessel when kept in it?

Answer: Mercury.

What common medication is acetylsalicylic acid used for?

Answer: A painkiller.

Which acid is used to remove ink spots?

Answer: Oxalic acid.

Which element is present in all acids?

Answer: Hydrogen.

In which process is light energy converted into chemical energy?

Answer: Photosynthesis.

Which metal is commonly responsible for air pollution in large cities?

Answer: Lead.

Which non-metal remains liquid at room temperature?

Answer: Bromine.

Which pair does not involve a coinage metal?

Answer: Zinc and Gold.

What method is used to estimate the age of most ancient geological formations?

Answer: C4 method.

What is the primary constituent of natural gas?

Answer: Methane.

What is the common name for washing soda?

Answer: Sodium carbonate.

By what characteristic is a superconductor characterized in terms of permeability?

Answer: Zero permeability.

In colorful diamonds, what causes the presence of different colors?

Answer: Impurities.

Which element never exhibits a positive oxidation state in any of its compounds?

Answer: Fluorine.

What is a major component of Biogas?

Answer: Methane.

Which metal is used for making boats as it does not corrode in seawater?

Answer: Titanium.

Which non-toxic gas aids in the formation of enzymes that ripen fruit?

Answer: Acetylene.

Into which stable isotope does uranium eventually decay?

Answer: Lead.

What contains a high content of lead?

Answer: High octane fuel.

What is used in beauty parlors for hair setting?

Answer: Sulphur.

What metal is the filament of an electric bulb made from?

Answer: Tungsten.

What is the average salinity of seawater?

Answer: 3.5%.

Which isotope of uranium is capable of sustaining chain reactions?

Answer: U-235.

What is used as a filler in rubber tires?

Answer: Carbon black.

Who first enunciated the quantum theory?

Answer: Max Planck.

Which charcoal is used to decolorize raw sugar?

Answer: Wood charcoal.

What is the most important ore of aluminum?

Answer: Bauxite.

Which metal is used in storage batteries?

Answer: Lead.

How are Oxygen and ozone-related?

Answer: Allotropes.

Which material is the best conductor of electricity?

Answer: Silver.

What gas is primarily found in ‘Gobar gas’?

Answer: Methane.

What gas is typically filled in electric bulbs?

Answer: Nitrogen.

Which elements belong to the Actinides with atomic numbers?

Answer: From 89 to 103.

From which source is iodine obtained?

Answer: Seaweeds.

What type of glass is used in making lenses and prisms?

Answer: Flint glass.

Rusting of iron is an example of what process?

Answer: Slow oxidation.

Which gas is also known as Stranger Gas?

Answer: Xenon.

Which chemical is utilized in foam fire extinguishers?

Answer: Aluminium sulphate.

What substance is used to retard the setting action of cement?

Answer: CaSO4.2H2O.

What is a mixture of potassium nitrate, powdered charcoal, and sulfur called?

Answer: Gunpowder.

Which non-metal is not a poor conductor of electricity?

Answer: Selenium.

What polymeric material is used for making a bulletproof jacket?

Answer: KEVLAR.

What type of glass is used for making glass-reinforced plastic?

Answer: Quartz glass.

What is referred to as philosopher’s wool?

Answer: Zinc oxide.

Which metal is non-toxic in nature?

Answer: Gold.

What is a powerful eye irritant found in smog?

Answer: Sulphur dioxide.

What is the primary constituent of vinegar?

Answer: Acetic acid.

Which toxic heavy metal is found in modern tannery industries?

Answer: Chromium.

What collective term is used for Carbon, diamond, and graphite?

Answer: Allotropes.

What metal coats galvanized iron sheets?

Answer: Zinc.

What are high-temperature superconductors made of?

Answer: Ceramic oxides.

By what can the location and energy of an electron in an atom be specified?

Answer: Quantum numbers.

What happens to its mass if a proton of mass ‘m’ moves at the speed of light?

Answer: Unchanged.

What particles constitute a deuterium nucleus?

Answer: One proton and one neutron.

Stainless steel is an alloy of which metals?

Answer: Iron, chromium, and nickel.

What form of phosphorus is used in safety matches?

Answer: Red phosphorus.

Which gas is used to extinguish fires?

Answer: Carbon dioxide.

What element is common to all acids?

Answer: Hydrogen.

Which substance can act as both an acid and a base?

Answer: Amphoteric.

Which gas leaked from the Union Carbide factory in Bhopal?

Answer: Methyl isocyanate.

What metal is found in ‘plaster of Paris’?

Answer: Calcium.

What is the primary ingredient in cement?

Answer: Limestone.

What is the basis of the modern periodic table?

Answer: Atomic number.

What are the essential raw materials in the cement industry?

Answer: Limestone and clay.

What is the major ingredient of leather? –

Answer: Collagen.