3801. By which process copper is refined _______?
✅ B. Roasting
Everyday Science MCQs – Page 191
3802. Which synthetic fibre is known as artificial Silk?
✅ A. Rayon
3803. A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?
✅ D. 3 feet
3804. Permanent hardness of water due to sulphate of metals can be destroyed by the use of ___ ?
✅ B. Zeolites
3805. One of the following ways of expressing the concentration of a solution does not depend on temperature. It is_____?
✅ A. Molality
3806. White bloods cells are also known as___?
✅ A. Leucocytes
3807. The scientific study of insects is known as __?
✅ A. Entomology
3808. P Waves are also said to be _____ waves?
✅ B. Push-pull
3809. Lunar eclipse occurs on_____?
✅
3810. Oil rises up to wick in a lamp because________?
✅ D. Capillary action phenomenon
3811. What is the scientific name of flying fish ?
✅ B. Exocoetidae
3812. Who was the first to measure the earth’s radius
✅ D. Eratosthenes
3813. Total volume of blood in a normal adult human being is
✅ B. 5-6 liters
3814. The large plates of solar pannels are painted?
✅ D. Black
3815. Stripes on each side of “Grévy’s Zebra” is about____?
✅ C. 80+
3816. How many calories are there in 1 gram of carbohydrate?
✅ C. 4
3817. The deepest place on earth is _______?
✅ A. Mariana Trench
3818. Which of the following acid is used in Ink?
✅ D. Tannic
3819. The human brain uses_____ percent of the total oxygen and blood in the body?
✅ B. 20
3820. Bromine is a_________?
✅ A. red-brown liquid