Crowdly

The

Minamata disease is caused due to the presence of the following in water

Choose the option giving correct layers of the

atmosphere in the order of increasing altitude:

Troposphere

– stratosphere – Mesosphere - Ionosphere

Mesosphere

– stratosphere – Ionosphere - Troposphere

Mesosphere

– stratosphere – Troposphere - Ionosphere

roposphere

– stratosphere – Ionosphere - Mesosphere

While

estimating the chemical oxygen demand of the sewage, organic matter is oxidized

by K

₂Cr₂O₇ in the presence of:

HNO₃

H₂SO₄

When all the fossil fuel stock is exhausted, CO₂

concentration will be about

What is ElNino? Choose the correct option.

ElNino is an occasional incursion of warm water

along the coast of Peru.

ElNino is an occasional incursion of cold water

along the coast of France.

ElNino is a perennial incursion of cold water

along the coast of Peru.

ElNino is the periodic cooling of sea-surface

temperatures across the east-central equatorial Pacific.

The Asteroid Belt is the main source of

asteroids reaching the earth. Which is that Asteroid Belt ?

Large collection of rock/debris between Mars and

Jupiter

Large collection of debris/rock between Earth

and Mars.

Large cloud of rocks out of solar system but very

close to it.

Large collection of rocks near the sun.

Cl2CF2 + UV light → CF2 + Cl2

Choose the option giving the correct set of reactions when the CFCs reach the

Stratosphere:

Cl2 + O3 → 2ClO + O

2ClO + 2O → Cl2 + 2O2

Cl2CF2 + UV light → CF2 + 2Cl

2Cl + 2O3 → 2ClO2 + O2

2ClO2 + O2 → Cl2 + 3O2

Cl2CF2 + UV light → ClCF2 + Cl

Cl + O3 → ClO + O2

ClO + O3 → Cl + 2O2

Cl2CF2 + UV light → Cl2CF + F

F + O3 → FO + O2

FO + O3 → F + 2O2

Oceans will release the dissolved CO₂

It is believed that, once the global warming has

set in strongly, then, further warming will be at a much rapid rate. Why ?

to the atmosphere due to the solubility issues.

The photosynthetic algae and other micro plants

of the oceans will be destroyed due to the warming and CO

₂

capture

capacity reduces considerably.

Halogenated compounds like CCl₄

, CFCs

and HFCs will rise to the stratosphere destroying the ozone layer rapidly,

causing UV rays reach the earth.

The CH₄

hydrates locked at the seabed

may be released to the atmosphere.

Choose the option that gives the positive effect

of global warming.

Increase

in the productivity of plants following C

₃

photosynthesis like rice,

wheat, etc.

Increased

rainfall due to the increased evaporation at higher temperatures.

Increased ocean productivity due to the higher

temperatures

Growth of the plants following C₄

photosynthesis like weeds is hindered.