Chemistry - Study Mode
[#361] Formation of ozone hole is maximum over
Correct Answer
(C) Antarctica
Explanation
Solution: Ozone holes are formed in Antarctica and these are due to special clouds that form in the stratosphere called polar stratospheric clouds. Clouds usually do not form in stratosphere, this can happen only at such low temperatures. These clouds accumulate pollutants resulting in formation of ozone holes.
[#362] Ozone saves the biosphere by absorbing high energy radiations called ________ .
Correct Answer
(C) Ultraviolet rays (UV)
Explanation
Solution: The ozone layer or ozone shield is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet (UV) radiation. It absorbs 97 to 99 percent of the Sun’s medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[#363] Which one of the following is not a cause for present global warming and climate change ?
Correct Answer
(C) Deforestation
Explanation
Solution: Deforestation is not a cause for present global warming and climate change.
[#364] Which of the following is not a noble gas ?
Correct Answer
(A) Hydrogen
Explanation
Solution: Hydrogen is not a noble gas as it has one electron in its shell and it is not stable unlike noble gases which are having 2,8,8 electrons in their outer shell.
[#365] Milk is a
Correct Answer
(A) Mixture
Explanation
Solution: Milk is a mixture.