Ozone layer is disturbed by : - Vidyadip

MCQ

Ozone layer is disturbed by :

A
Large number of factories.
✓
Supersonic jets.
C
Large number of automobiles.
D
None of these.

✓

Answer

Correct option: B.

Supersonic jets.

Ozone is a form of a blanket covering the upper atmosphere which protects the earth from harmful ultraviolet rays. Because of ozone depletion, these rays can now reach the earth through hole which was previously protected by ozone blanket. The various causes of ozone depletion are as follows :
Huge combustion of fossil fuel and organic matter.
Excessive use of nitrogenous fertilizers.
supersonic rockets and space shutters.
Nuclear test.
Excessive use of chlorofluorocarbons.

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

Outermost electronic configurations of four elements $A, B, C, D$ are given below.

$3 s^{2}$; $3 s^{2} 3 p^{1}$; $3 s ^{2} 3 p ^{3}$; $3 s^{2} 3 p^{4}$

The correct order of first ionization enthalpy for them is.

Assign $A, B, C, D$ from given type of reaction. $Red\, P + Alkali \longrightarrow Na_4P_2O_6 + P_2H_4$

Which heat depends on the direction of current?

Which of the set of species have same hybridisation state but different shapes

Which one of the following compounds is resistant to nucleophilic attack by hydroxyl ions?

The weakest Lewis acid is

For an ideal solution of two components $A$ and $B$, which of the following is true?

Henderson’s equation is $pH = p{K_a}$$+ log$$\frac{{[{\text{salt}}]}}{{[{\text{acid}}]}}$. If the acid gets half neutralized the value of $pH$ will be : $[p{K_a} = 4.30]$

Which of the following has highest knocking

The reaction of cyanamide, $NH _{2} CN _{( s )}$ with oxygen was run in a bomb calorimeter and $\Delta U$ was found to be $-742.24\, kJ\, mol ^{-1}$. The magnitude of $\Delta H _{298}$ for the reaction

$NH _{2} CN _{( s )}+\frac{3}{2} O _{2}( g ) \rightarrow N _{2( g )}+ O _{2}( g )+ H _{2} O _{(l)}$

is ............ $kJ$. (Rounded off to the nearest integer)

[Assume ideal gases and $\left. R =8.314\, J\, mol ^{-1} K ^{-1}\right]$