दैनिक विज्ञान की मूल बातें MCQ — 96 अभ्यास प्रश्न उत्तर सहित

Explanation

Geminids originate from asteroid 3200 Phaethon, making them unique as most meteor showers are associated with comets.

Explanation

Evapotranspiration (ET) is the combined process of water evaporation from soil/water surfaces and transpiration from plants. It accounts for ~60% of precipitation that falls on land. ET is a crucial component of the water cycle and is affected by temperature, humidity, wind, and vegetation type.

Explanation

A Geiger-Müller counter detects ionizing radiation (alpha, beta, gamma rays). It works by detecting ions produced when radiation passes through a gas-filled tube. It is widely used in nuclear facilities, hospitals, and environmental radiation monitoring.

Explanation

Ozone (O3) is a triatomic molecule of oxygen. It forms a protective layer in the stratosphere (15-35 km altitude) that absorbs harmful ultraviolet (UV-B) radiation from the Sun. Ground-level ozone is a pollutant.

Explanation

India has about 25% of world's thorium reserves, primarily in monazite sand along the coasts of Kerala, Tamil Nadu, and Odisha. Monazite contains thorium phosphate. Thorium-232 is key to Stage III of India's nuclear programme (thorium-uranium-233 cycle).