21. The temperature scale that sets freezing of pure water at 32o F:-
a. Kelvin
b. Fahrenheit
c. Celsius
d. British

Option”B” is correct

Under this system, the Fahrenheit scale is redefined slightly so that the freezing point of water is exactly 32 °F, and the boiling point is exactly 212 °F or 180 degrees higher.
22. The pollutant that causes hole in the ozone layer is-
a. SF6
b. nitrousoxide
c. CFCs
d. PFCs

Option”C” is correct

Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
23. Ozone depletion is mostly caused by-
a.
b. CCL
c.
d. CO

Option”C” is correct

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.
24. Which one of the following is the correct percentage of the two green house gases that contribute to the total global warming?
a.
b.
c.
d.

Option”B” is correct

Methane-20%, N2O-18% is the correct percentage of the two green house gases that contribute to the total global warming.
25. Pick out the potent green house gas-
a. CO2
b. N2O
c. CH4
d. O3

Option”C” is correct

Methane (CH4) is the potent green house gas.
26. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the:
a.
b.
c.
d.

Option”C” is correct

A radiation inversion is most commonly observed: just above the ground. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by: the circulation of heat by the atmosphere and the oceans.
27. The intermediate developmental stages in the ecological succession is called-
a. sere
b.
c.
d.

Option”A” is correct

A seral community (or sere) is an intermediate stage found in ecological succession in an ecosystem advancing towards its climax community.
28. The final stable community in an ecological succession is called the-
a.
b.
c.
d.

Option”C” is correct

The final or stable community in a sere is the climax community or climatic vegetation. It is self-perpetuating and in equilibrium with the physical habitat.
29. Typically, water vapour occupies about what percentage of the air’s volume near the earth’s surface?
a.
b.
c.
d.

Option”D” is correct

Typically, water vapour occupies about less than 4 percent of the air’s volume near the earth’s surface.
30.
Heavy dust can cause-
a.
b.
c.
d.

Option”C” is correct

Heavy dust can cause closure of stomata.
Pages: 1 2 3 4 5 6 7

153 thoughts on “Environmental Science”

  4. Code of destiny

    I’m really inspired together with your writing talents and also with the layout to your blog. Is this a paid theme or did you modify it your self? Anyway keep up the excellent high quality writing, it’s rare to look a great blog like this one these days!

  66. Gexqvtzu

    Explore the ranked best online casinos of 2025. Compare bonuses, game selections, and trustworthiness of top platforms for secure and rewarding gameplayBonus offer.

  123. Edwardwak

    ¡Saludos, entusiastas del riesgo !
    Casinos extranjeros con juegos de realidad virtual – п»їhttps://casinosextranjerosenespana.es/ п»їcasinos online extranjeros
    ¡Que vivas increíbles recompensas sorprendentes !

  126. WilliamMouch

    ¡Hola, maestros del juego !
    Casino fuera de EspaГ±a que acepta PayPal – п»їп»їhttps://casinoonlinefueradeespanol.xyz/ casinoonlinefueradeespanol.xyz
    ¡Que disfrutes de asombrosas movidas brillantes !

  129. Chrisimins

    ¡Saludos, amantes de la diversión !
    casino online extranjero con soporte en vivo – п»їhttps://casinosextranjero.es/ casino online extranjero
    ¡Que vivas increíbles giros exitosos !

  131. Coreyemind

    Этот информационный обзор станет отличным путеводителем по актуальным темам, объединяющим важные факты и мнения экспертов. Мы исследуем ключевые идеи и представляем их в доступной форме для более глубокого понимания. Читайте, чтобы оставаться в курсе событий!
    Детальнее – https://nakroklinikatest.ru/

  136. oakleyopaine

    It’s a fairly democratic operation ahem that link means do your own research so it attracts a wide variety of buyers and dealers who might be priced-out at Phillips or elsewhere. All of that means of course is that there are fewer historically important or unique pieces available but there are still plenty of interesting watches to see and people to watch. Here are three that caught my eye.

  141. CalvinGaw

    ¡Bienvenidos, estrategas del entretenimiento !
    Casino por fuera con mГєltiples opciones de depГіsito – п»їhttps://casinofueraespanol.xyz/ casino por fuera
    ¡Que vivas increíbles botes deslumbrantes!

  142. Douglasvok

    ¡Hola, fanáticos del entretenimiento !
    casinos fuera de EspaГ±a para grandes ganancias – п»їhttps://casinosonlinefueradeespanol.xyz/ п»їcasino fuera de espaГ±a
    ¡Que disfrutes de asombrosas premios excepcionales !

  143. Douglasvok

    ¡Hola, cazadores de tesoros !
    Casino por fuera con torneos globales – п»їhttps://casinosonlinefueradeespanol.xyz/ casinos fuera de espaГ±a
    ¡Que disfrutes de asombrosas recompensas únicas !

  145. DonteNonna

    ¡Hola, buscadores de recompensas excepcionales!
    Casino online sin licencia EspaГ±a con bonos ocultos – п»їhttps://casinosinlicenciaespana.xyz/ casino online sin licencia
    ¡Que vivas increíbles jugadas brillantes !

  150. Charlesroppy

    ¡Hola, fanáticos del riesgo !
    Casino online sin licencia con juegos 3D – п»їcasinosonlinesinlicencia.es casino sin licencia en espaГ±a
    ¡Que vivas increíbles victorias memorables !

  151. HenryWossy

    ¡Saludos, participantes de juegos emocionantes !
    GuГ­a de casinos no regulados en EspaГ±a – п»їemausong.es casinos sin licencia en espana
    ¡Que disfrutes de increíbles jackpots sorprendentes!

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top