Question # 1

Which of the following pollutant result from roasting and heating processes.

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Dust

Smoke

Metal fumes

All above

The expected specific waste of food industry is.

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Meats

Nuts

Fats or Oils

All above

A high frequency sound has frequency

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100 Hz

200 HZ

300 Hz

500 Hz

Which of the following statement is not true with respect to the role of matter undergoing decomposition.

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Decomposed matter increase soil fertility

They provide a texture which is favorable for plant growth

Organic compounds for complexes with mineral nutrients which enhance uptake by plants.

In high concentration the decomposition product may increase the photosynthesis

The unit of sound pressure level is

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Pascal

Decibel

Newton

Ampere

Which of the following pose threat to historical monument Taj.

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Floods in Yamuna river

Temperature mediated spoilage of marble

Air pollutants from Mathura refinery

Weathering of marble

Which of the following statement is not correct with respect to radioactive pollutnats.

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Carcinoma and breast cancer

Leukemia

Increases biological immune system

Somatic and generic disorder

The main active contaminants of nuclear reactors are.

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Co- 60

Mn -54

Sr-60

All above

Environmental pollution effects.

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Biotic component

Plants only

Humans only

Both biotic and abiotic components of environment

Which of the following is not chemical characteristics of water.

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pH

COD

BOD

Colour

Which of the following process is not physical in nature.

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Mixing

Flocculation

Sedimentation

Activated sludge process

Which of the following oxide formed in appreciable quantity in the atmosphere.

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NO

NO2

N2O

All above

Which of the following gas does not exist free on earth.

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N2

H2

O2

CH4

Which of the following statement is not relevant with nitrous oxide.

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It is a colorless and odourless gas

It is non toxic gas

It is present in the atmosphere in higher concentration

It has high reactivity in the lower atmosphere

Which of the following statements is not related with principal requisites of water for industrial purposes.

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It should be pure and cool

It should not contain iron

It contains less quantity of line

It must be soft

The key element to be considered when evaluating a health hazard is.

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The amount of material the employee is exposed.

The total time of exposure

The toxicity of the substance

All above

Which of the following reacts with hemoglobin of blood and produce toxic effect.

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Carbon dioxide

Carbon monoxide

Oxygen

Carbon suboxide

Which of the following chemical strong oxidizing agent is used in COD test.

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KMnO4

H2SO4

CH3COOH

K2Cr2O7

Which of the following substance is colloidal in nature.

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Clay

Al2O3

Fe2O3

All above

Which of the following substance act as photochemical oxidant

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Ozone

NOx

peroxyacetyl nitrate

All above

The expected specific wastes of textile industry is

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Cloth residue

Fibre residue

Dyes

All above

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