7 SCIENCE MCQ

Q1. Wastewater generated in hospitals primarily consists of Radioactive substances Acids and bases Plastic Dead debris Solution Wastewater from hospitals contains several types of disease-causing germs and radioactive substances used in the treatment of diseases. Q2. The dissolved and suspended impurities in sewage are called Scum Contaminants Sludge Biofilms Solution Several dissolved and suspended i...

Q1. Forests are useful to us in many ways. However, man has also faced some undesirable consequences due to forests. Which of the following is one of them? Prevention of floods Prevention of soil erosion Maintenance of water table Forest fires Solution Forest fires are the most common hazards in the forests. They pose a threat not only to the forest wealth but also to the entire flora and fauna disturbing the biodiversity and the ecology and environment of a region.  Q2. What prevents sunlight from entering forests? Covering of leaves ...

Q1. Which of the following does not deplete the water table at a place? Increasing number of tube-wells Increasing deforestation Scanty rainfall Increasing snowfall Solution Increasing snowfall does not deplete the water table at a place. Q2. The process in which rainwater seeps through the soil is called  Distillation Infiltration Recharging Harvesting Solution When the rain falls on the Earth's surface, some of the water seeps through the soil. This proce...

Q1. What kind of image is formed by a plane mirror? Real and inverted Real and erect Virtual and erect Virtual and inverted Solution Virtual and erect image is formed by a plane mirror. Q2. The speed of light in vacuum is 3 x 10 6 m/s 3 x 10 7 m/s 3 x 10 8 m/s 3 x 10 9 m/s Solution The speed of light in vacuum is 3 x 10 8 m/s. Q3. Dispersion of light by a glass prism takes place because: ...