Download App

Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry1 Mark
MCQ
Which one is not dangerous for life and atmosphere?
  • A
    Biopollutants.
  • ✓
    Ozone layer.
  • C
    Nuclear blast.
  • D
    Deforestation.
✓

Answer

Correct option: B.
Ozone layer.
Ozone layer or shield is present in the stratosphere. It is also called Ozonosphere. Ozonosphere lies at an altitude of $23$ to $25\ km$ over the equator and at slightly lower altitude elsewhere. Ninety percent of atmospheric ozone is present in the ozonosphere. Ozone found in the stratosphere is useful for life on earth as it protects the earth from harmful ultra-violet rays and other radiations.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Environmental Chemistry→Environmental Chemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following is most reactive?
→
Find the value of wave number of $(\bar v)$ in terms of Rydberg's constant, when transition of electron takes place between two levels of $He^+$ ion whose sum is $4$ and difference is $2$
→
Each of the following options contains a set of four molecules. Identify the option($s$) where all four molecules possess permanent dipole moment at room temperature.

$(1)$ $BeCl _2, CO _2, BCl _3, CHCl _3$

$(2)$ $SO _2, C _6 H _5 Cl , H _2 Se , BrF _5$

$(3)$ $BF _3, O _3, SF _6, XeF _6$

$(4)$ $NO _2, NH _3, POCl _3, CH _3 Cl$

→
Total number of orbitals associated with third shell will be $ .........$
→
Amongst the following the most basic compound is
→
The correct option with respect to the Pauling electronegativity values of the elements is
→
Atom with $ ......... $ atomic radii and $ ........ $ ionisation potential tends to gain electrons :
→
$10\,g$ of hydrogen and $64\,g$ of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be ............... $\mathrm{mol}$
→
The correct order of increasing basicity of the given conjugate bases $( R = CH_3)$ is
→
Which among the following is incorrect statement?
→