(3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ozone UV absorption is important to life, since it extends the absorption of UV by ordinary oxygen and nitrogen in air (which absorbs all wavelengths < 200 nm) through the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).

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The advantage of detergents over soaps is – (1) Detergents are soluble in water (2) Detergents could not give much lather (3) Detergents give lather even with hard water (4) Soaps give lather with only soft water

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Description : (3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ... the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).

Last Answer : The advantage of detergents over soaps is – (1) Detergents are soluble in water (2) Detergents could not give much lather (3) Detergents give lather even with hard water (4) Soaps give lather with only soft water

Description : The presence of ozone in the stratosphere is responsible for (1) increasing the average global temperature in recent years (2) higher rate of photosynthesis (3) checking the penetration of ultra-violet rays to the earth (4) supplying oxygen for people travelling in jets

Last Answer : checking the penetration of ultra-violet rays to the earth

Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3

Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Description : In organic molecules, fluorescence seldom results from absorption of UV radiation of wavelengths lower than (A) 350 nm (B) 200 nm (C) 300 nm (D) 250 nm

Last Answer : (A) 350 nm

Description : Ozone layer above the surface of Earth provides a shield against – (1) X-rays (2) Ultra-violet rays (3) Gamma rays (4) Infra-red rays

Last Answer : (2) Ultra-violet rays Explanation: The Ozone layer absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth.

Description : Ozone layer above the surface of Earth provides a shield against (1) X-rays (2) Ultra-violet rays (3) Gamma rays (4) Infra-red rays

Last Answer : Ultra-violet rays

Description : The Ozone layer protects us from: (1) Cosmic rays (2) Ultra-Violet rays (3) Visible rays (4) Infrared rays

Last Answer : (2) Ultra-Violet rays Explanation: The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97- 99% of the Sun's ... 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.

Description : The ozone layer protects us from - (1) Ultra violet rays (2) Radio waves (3) Visual radiation (4) Infrared radiation

Last Answer : (1) Ultra violet rays Explanation: The ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects.

Description : The Ozone layer protects us from: (1) Cosmic rays (2) Ultra-Violet rays (3) Visible rays (4) Infrared rays

Last Answer : Ultra-Violet rays

Description : Ultra violet light of Sun's radiation is prevented from reaching the earth's atmosphere by the layer of – (1) Oxygen (2) Hydrogen (3) Ozone (4) Helium

Last Answer : (3) Ozone Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03). The layer absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth.

Description : Ultra violet light of Sun’s radiation is prevented from reaching the earth’s atmosphere by the layer of (1) Oxygen (2) Hydrogen (3) Ozone (4) Helium 

Last Answer : Ozone

Description : Which of the following parts of the sunlight makes the solar cooker hot? (1) Ultra violet (2) Red light (3) Infra red (4) Cosmic rays

Last Answer : (3) Infra red Explanation: Glass transmits visible light but blocks infrared thermal radiation from escaping. This amplifies the heat trapping effect. A solar cooker, or solar oven, is a device which ... The vast majority of the solar cookers presently in use are relatively cheap, low-tech devices.

Description : Which of the following parts of the sunlight makes the solar cooker hot ? (1) Ultra violet (2) Red light (3) Infra red (4) Cosmic rays

Last Answer : Infra red

Description : The ultra violet radiations of the Sun do not reach the Earth because the upper layers of the atmosphere contain (a) oxygen (b) helium (c) ozone (d) hydrogen

Last Answer : Ans:(c)

Description : Ozone is (A) A primary pollutant (B) A secondary pollutant (C) Impervious to ultra-violet rays (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Description : Which component of the protein absorb UV light at 280 nm?

Last Answer : Indole ring of tryptophan.

Description : In upper layer of atmosphere ozone is formed by (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere

Last Answer :  the action of ultraviolet rays on oxygen

Description : Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by – (1) Carbon dioxide (2) Ammonia (3) Chlorine (4) Ozone

Last Answer : (4) Ozone Explanation: The ozone layer absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth. Ozone ... Earth's atmosphere. In total, ozone makes up only 0.6 parts per million of the atmosphere.

Description : Ultra violet radiations of the Sun do not reach the earth because, earth’s atmosphere is surrounded by (1) Carbon dioxide (2) Ammonia (3) Chlorine (4) Ozone

Last Answer : Ozone

Description : Nucleic acid show strong absorption at one of the wavelength: (A) 280 nm (B) 220 nm (C) 360 nm (D) 260 nm

Last Answer : Answer : D

Description : Ozone hole causes a) Global warming b) Reduction in the rate of photosynthesis c) More UV rays come to earth d) All the above.

Last Answer : c) More UV rays come to earth

Description : Which of the following is generally used for induced mutagenesis in crop plants? (a) X-rays (b) UV (260 nm) (c) Gamma rays (from cobalt-60) (d) Alpha particles

Last Answer : (c) Gamma rays

Description : A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` Assuming that the entire photon energy is taken up by

Last Answer : A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` ... what kinetic energy will the electron be ejected?

Description : If UV-C helps create ozone layer and converts Oxygen to O-3. Then why isn't it called ionizing radiation?

Last Answer : answer:In general, Ionizing radiation uses alpha, beta or gamma particles In general , Non ionizing radiation is electomagnetic waves like radio waves, light, thermal UV-C is considered right at the ... consider anything less than 100 nm ionizing . The EPA has a handy chart discussing this.

Description : This cause the depletion of ozone layer by decomposing ozone to oxygen . a) CFC b)UV radiations c)CO2 d)O2

Last Answer : b)UV radiations

Description : The wavelength of visible light extends from a. 0.8 to 1.0 nm b. 400 to 750 nm c. 200 to 660 nm d. 700 to 1200 nm

Last Answer : b. 400 to 750 nm

Description : The wavelength of a visible extends from ∙ A. 0.8 to 1.6 um ∙ B. 400 to 750 nm ∙ C. 200 to 660 nm ∙ D. 700 to 1200 nm

Last Answer : B. 400 to 750 nm

Description : The wavelength of visible light extends from ∙ a. 0.8 to 1.0 nm ∙ b. 400 to 750 nm ∙ c. 200 to 660 nm ∙ d. 700 to 1200 nm

Last Answer : b. 400 to 750 nm

Description : Ozone saves the biosphere by absorbing high energy radiations called - (1) Infra-red (2) Gamma rays (3) Ultraviolet rays (UV) (4) X-rays

Last Answer : (3) Ultraviolet rays (UV) Explanation: 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 ... 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.

Description : Ozone saves the biosphere by absorbing high energy radiations called _____ . (1) Infra-red (IR) (2) Gamma rays (3) Ultraviolet rays (UV) (4) X–rays

Last Answer : Ultraviolet rays (UV) 

Description : Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Last Answer : (A) Polymeric fibres are never produced by addition polymerisation

Description : Is there an connection between commercial manicures and skin cancer/ultra violet rays?

Last Answer : https://www.reuters.com/article/us-dermatology-uv-light/are-nail-salon-uv-lamps-a-skin-cancer-risk-idUSKBN0DG1VC20140430 quote: NEW YORK (Reuters Health) - The ultraviolet lamps used in some ... month, lead author Dr. Lyndsay Shipp from Georgia Regents University in Augusta told Reuters Health.

Description : Which of the following has the lowest frequency? (1) Visible light (2) Gamma rays (3) Xrays (4) Ultra violet rays

Last Answer : (1) Visible light Explanation: The common material used as fuse wire is an alloy of tin and lead (63% tin and 37% lead). Fuse wires provide over current protection of an electrical circuit ... or strip that melts when too much current flows through it, thereby interrupting the flow of current.

Description : In a filament type light bulb most of the electric power consumed appears as – (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light

Last Answer : (2) infra-red rays Explanation: When electricity is passed through the filament, the filament gets hot. Depending on the temperature of the filament, radiation is emitted from the filament. The ... energy converts into visible light and rest of it is emitted as heat or infrared radiation.

Description : The light rays used for eliminating bacteria – (1) X-rays (2) infrared rays (3) microwave radiation (4) ultra-violet radiation

Last Answer : (4) ultra-violet radiation Explanation: Ultraviolet radiation is used to kill microorganisms, molds and fungus in various environmental applications. UV sterilization is used for air- ... water purification, aquarium and pond maintenance, laboratory hygiene and food and beverage protection.

Description : Which of the following is the most harmful for the human being? (A) β-rays (B) X-rays (C) γ-rays (D) Ultra violet rays

Last Answer : (C) γ-rays

Description : Which of the following has the highest energy? A. gamma rays (Answer) B. X-rays C. Ultra-violet radiation D. radio waves

Last Answer : A. gamma rays (Answer)

Description : Night vision is possible with the help of ------? A. Red light B. Violet light C. Infrared Rays (Answer) D. Ultra violet Light E. None of these

Last Answer : C. Infrared Rays (Answer)

Description : Which of the following has the lowest frequency? (1) Visible light (2) Gamma rays (3) Xrays (4) Ultra violet rays

Last Answer : Visible light

Description : In a filament type light bulb most of the electric power consumed appears as (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light

Last Answer : infra-red rays

Description : The light rays used for eliminating bacteria (1) X-rays (2) infrared rays (3) microwave radiation (4) ultra-violet radiation

Last Answer : ultra-violet radiation

Description : Which of the following wavelengths where absorption of electromagnetic waves becomes peak due to vibrational resonances in the water vapor molecule? A. 1.35 cm and 1.7 mm B. 1.5 mm and 5 mm C. 1.35 dm and 1.7 cm D. 1.5 cm and 5mm

Last Answer : A. 1.35 cm and 1.7 mm

Description : Which of the following wavelengths where absorption of electromagnetic waves becomes peak due to vibrational resonances in the water vapor molecule? A. 1.35 cm and 1.7 mm B. 1.5 mm and 5mm C. 1.35 dm and 1.7cm D. 1.5 cm and 5 mm

Last Answer : A. 1.35 cm and 1.7 mm

Description : A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it. (A) Hydrogen (B) Carbon dioxide (C) Ozone (D) None of these

Last Answer : (C) Ozone

Description : Ordinary water is not used as a moderator because, it (A) Has a low absorption cross-section (B) Has a low scattering cross-section (C) Absorbs neutrons (D) Does not absorb neutrons

Last Answer : (C) Absorbs neutrons

Description : Peeling of ozone umbrella, which protects us from UV rays, is caused by:

Last Answer : Peeling of ozone umbrella, which protects us from UV rays, is caused by: A. CFCs B. PAN C. `CO_(2)` D. coal burning

Description : In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm, hence is called (A)____ while in PS II it has absorption maxima at 680 nm

Last Answer : In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm, hence is called (A) ... absorption maxima at 680 nm and is called (B)____

Description : Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth? (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Nitrogen

Last Answer : (1) Carbon dioxide Explanation: Carbon dioxide is a green house gas that absorbs heat radiated from the Sun as well as re-radiated heat from the Earth's surface.