RIP Day 2 4.2

Softening of water is done by

• boiling and adding lime

• cooling and heating

• adding fluoride

• None of the above

D.D.T. ,Aldrin,benzene are used as______

• Insecticides

• fertilizers

• weedicides

• Pesticides

The nature has its own mechanism to remove the pollutant. This mechanism is called

• Photosynthesis

• scavenging

• dispersion

• chlorosis

The main toxic solid substance gets released in water from industry are

• Mercury & carbon

• Lead and mercury

• Phosphates and nitrates

• oxygen and hydrogen

Primary pollutants means those pollutants

• released by chemical reaction

• released by process of hydration

• released by process of photosynthesis

• released directly into air

Necrosis means________

• damaging the ozone layer

• damaging the leaves

• premature fall of leaves

• damaging the leaves

The pollutants that can be broken rapidly by the natural process is called as

• organic pollutants

• inorganic pollutants

• non-degradable pollutants

• degradable pollutants

The process of autrophication ____in water.

• increases water level and decreases soil level.

• increases organic level and decreases inorganic level.

• increases Oxygen level and decreases CO2 level.

• Decreases Oxygen level and Increases CO2 level.

A harmful mixture formed by gases of nitrogen particulates matter due to phtochemical reactors under the influance of strong sunlight is called as____

• Photosynthesis

• chlorosis

• phtochemical smog

• smoke

General nervous system gets affected by

• oxygen

• phosporous

• lead

• titanium