Chemical Engineering

Question: Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?
[A].

CO2

[B].

H2

[C].

SO3

[D].

N2

Answer: Option C

Explanation:

No answer description available for this question.

Question: Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
[A].

hydrogen sulphide

[B].

mercury

[C].

cadmium

[D].

asbestos

Answer: Option C

Explanation:

No answer description available for this question.

Question: Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
[A].

thermosphere

[B].

stratosphere

[C].

troposphere

[D].

mesosphere

Answer: Option B

Explanation:

No answer description available for this question.

Question: World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in
[A].

Arizona (U.S.A.)

[B].

Chernobyl (undivided U.S.S.R.)

[C].

Pensylvania (U.S.A.)

[D].

Moscow (U.S.S.R.)

Answer: Option B

Explanation:

No answer description available for this question.

Question: CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
[A].

102

[B].

105

[C].

109

[D].

1015

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ can not control the noise pollution.
[A].

Use of silencers

[B].

Green house gases

[C].

Vibration damping

[D].

Tree plantation

Answer: Option B

Explanation:

No answer description available for this question.

Question: Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by
[A].

chemical coagulation

[B].

floatation & skimming

[C].

centrifugation

[D].

ultrafiltration

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following pollutants, if present in atmosphere is detectable by its odour ?
[A].

CO

[B].

SO2

[C].

NO2

[D].

CO2

Answer: Option B

Explanation:

No answer description available for this question.

Question: World environment day is observed every year on the 5th of
[A].

June

[B].

December

[C].

July

[D].

September

Answer: Option A

Explanation:

No answer description available for this question.

Question: As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3.(μg-microgram)
[A].

10

[B].

90

[C].

800

[D].

750

Answer: Option B

Explanation:

No answer description available for this question.