Most relevant Science Objective Questions for CDS Examination in September 2025
CDS SCIENCE SET-1
Science Objective Questions
- Which vitamin is produced in the body by sunlight?
- The chemical formula of baking soda is?
- Which gas is known as “Laughing Gas”?
- Who discovered the electron?
- Which organ purifies blood in the human body?
- The SI unit of force is?
- Which law explains the relationship between current, voltage, and resistance?
- Name the process by which plants lose water through stomata.
- Which part of the cell is known as the “powerhouse”?
- Which layer of atmosphere contains the ozone layer?
- Which metal is liquid at room temperature?
- The speed of light is approximately?
- Who proposed the theory of evolution by natural selection?
- Which acid is found in lemon?
- The element essential for photosynthesis is?
- DNA stands for?
- The hardest substance in the human body is?
- Which blood group is called the “Universal Donor”?
- Sound cannot travel through?
- Which part of the human brain controls balance?
- The chemical name of common salt is?
- The ozone layer protects us from which rays?
- Who discovered penicillin?
- The boiling point of water is?
- The first artificial satellite of the world was?
- Who invented the telephone?
- The process of conversion of milk into curd is due to?
- Which device is used to measure blood pressure?
- Which part of the plant conducts food?
- Kyoto Protocol is related to?
- Which is the smallest bone in the human body?
- The human body has how many pairs of ribs?
- Which gas is used in fire extinguishers?
- The most abundant element in the Earth’s crust is?
- Which organ in the human body secretes insulin?
- Who discovered the X-rays?
- The unit of energy is?
- Which device converts chemical energy into electrical energy?
- Photosynthesis occurs in which part of plant cells?
- Which blood cells help in clotting of blood?
- The blue colour of the sky is due to?
- Which is the largest gland in the human body?
- The SI unit of temperature is?
- The Richter scale is used to measure?
- Which metal is used in galvanisation?
- The study of fungi is called?
- Which is the cleanest form of energy?
- The substance used in pencils is?
- The gas responsible for acid rain is?
- Which vitamin deficiency causes scurvy?
- Which vitamin is produced in the skin by sunlight?
- Which gas is used in fire extinguishers?
- What is the SI unit of force?
- Which organ controls blood sugar levels?
- Which part of the cell contains genetic material?
Answers to these Science Objective questions will be posted in the next article. Please write answers in your notebook
