Latest General Science articles & notes for all competitive exams.
An atom is the smallest unit of matter made of protons, neutrons and electrons. Atomic structure is a high-scoring chemistry topic for SSC and Railway exams.
The periodic table arranges all known elements by increasing atomic number into periods and groups. It is one of the most asked chemistry topics in exams.
Acids taste sour, bases taste bitter, and salts form when they react. This chemistry topic with pH and indicators is common in SSC and Railway science.
Metals are shiny, hard and good conductors, while non-metals are mostly dull and poor conductors. Their properties and uses appear often in exam science.
A chemical reaction changes substances into new ones. Types of reactions, balancing equations and key examples are regularly asked in competitive science.
Carbon forms millions of compounds through catenation and covalent bonding. Allotropes, hydrocarbons and functional groups are common exam topics.
The digestive system breaks food into nutrients the body can absorb. Its organs, enzymes and functions are frequently asked in biology sections of exams.
The circulatory system carries blood, oxygen and nutrients through the body. The heart, blood vessels and blood are key biology topics for exams.
The respiratory system takes in oxygen and removes carbon dioxide. The lungs, breathing process and gas exchange are common biology exam topics.