In stratosphere , which one of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?A. FeB. ClC. CarbonD. Oxygen

In stratosphere , which one of the following elements acts as a cataly

1.	In stratosphere , which one of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?A. FeB. ClC. CarbonD. Oxygen
Answer» Correct Answer - B In stratosphere , Cl acts as a catalyst in the degradation of ozone and release of molecular oxygen . It is released by action of UV rays on a chlorofluorocarbon . Chlorine reacts with ozone in a series of chain reaction , converting it into oxygen . One active chlorine can destroy 5000 molecules of ozone in one month . `CFCl_(3) overset(UV-C)(to) CFCl_(2) + Cl` `CFCl_(2) overset(UV-C)(to) CFCl + Cl` `Cl + O_(3) to ClO + O_(2)` `ClO + O_(3) to Cl + 2O_(2)` Iron (Fe) , carbon (C) and oxygen (O) are not Ozone Depleting Substances (ODS).

Discussion

No Comment Found

Related InterviewSolutions

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is `1s^(2),2s^(2)2p^(3)`, the simplest formula for this compound isA. `Mg_(2)X`B. `MgX_(2)`C. `Mg_(2)X_(3)`D. `Mg_(3)X_(2)`
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations: a. 60 mL `(M)/(10) HCl + 40 mL (M)/(10)` NaOH b. 55 mL `(M)/(10) HCl + 45 mL (M)/(10)` NaOH c.75 mL `(M)/(5) HCl + 25 mL (M)/(5)` NaOH d. 100 mL `(M)/(10) HCl + 100 mL (M)/(10)` NaOH pH of which one of them will be equal to 1 ?A. IVB. IC. IID. III
According to Hugo de Vries, the mechanism of evolution isA. phenotypic variationsB. saltationC. multiple step mutationsD. minor mutations
Which one of the following population interaction is widely used in medical science for the production of antibiotics ?A. ParasitismB. MutualismC. CommensalismD. Amensalism
Which one of the statements is incorrect?A. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atomsB. Glycolysis occurs in cytosolC. Enzymes of TCA cycle are present in mitochondrial matrixD. Oxidative phosphorylation takes place in outer mitochindrial membrane
Select the incorrect mathc.A. `{:("Submetacentric chromosomes" ,-,"L-shaped chromosomes"):}`B. `{:("Allosomes" ,-,"Sex chromosomes"):}`C. `{:("Lampbrush chromosomes" ,-,"Diplotene bivalents"):}`D. `{:("Polytene chromosomes " ,-,"Oocytes of amphibians"):}`
Which of the following terms descibe humans dentition ?A. Pleurodont, Monophyodont, HomodontB. Thecodont, Diphyodent, HeterodontC. Thecodont, Diphyodont, HomodontD. Pleurodont, Diphyodont, Heterodont
Which of the following features is used to identify a male cockroach from a female cockroach ?A. Forewings with darker tegminaB. Presence of caudal stylesC. Presence of a boat-shaped sternum on the 9th abdominal segmentD. Presence of anal cerci
Which one of these animals is not a homeotherm ?A. CamelusB. CheloneC. MacropusD. Psittacula
The increasing order of atomic radii of the following group 13 elements isA. `B lt Ga lt Al lt Tl lt In`B. `B lt Al lt Ga lt In lt Tl`C. `B lt Al lt In lt Ga lt Tl`D. `B lt Ga lt Al lt In lt Tl`

In stratosphere , which one of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?A. FeB. ClC. CarbonD. Oxygen

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment