UPSC Science & Technology Questions
143 questions with explanations
A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD? 1) DVD supports Standard Def…
An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth
What is the difference between a CFL and an LED lamp? 1) To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material…
What is the difference between Bluetooth and Wi-Fi devices?
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: 1) The orbit is geosynchronous. …
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: 1) The orbit is geosynchronous. …
The function of heavy water in a nuclear reactor is to
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us? 1) It …
Consider the following statements: 1. Hepatitis B is several times more infectious than HIV/AIDS. 2. Hepatitis B can cause liver cancer. Which of the statements…
Which one of the following processes in the bodies of living organisms is a digestive process?
With reference to the treatment of cancerous tumours, a tool called cyberknife has been making the news. In this context, which one of the following statements …
Which among the following do/does not belong/belongs to the GSM family of wireless technologies?
What is the principle by which a cooling system (Radiator) in a motor car works?
India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-Year Plan. In this context, consider the f…
Consider the following: 1. Bluetooth device 2. Cordless phone 3. Microwave oven 4. Wi-Fi device Which of the above can operate between 2-4 and 2.5 GHz range of …
Chlorination is a process used for water purification. The disinfecting action of chlorine is mainly due to
Consider the following statements : The satellite Oceansat-2 launched by India helps in 1. estimating the water vapour content in the atmosphere. 2. predicting …
Recently, LASIK (Laser Assisted In Situ Keratomileusis) procedure is being made popular for vision correction. Which one of the following statements in this con…
Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Why is it difficult …