Part 8 (45 mins) (1) All these are true about the atmosphere except (a) Protects

Question

Part 8 (45 mins) (1) All these are true about the atmosphere except (a) Protects us from harmful radiation (b) Affect our climate (c) Affect our weather (d) Oxygen is the most abundant in its composition (2) Variation of temperature with height in the Tropospshere is similar to that of the (a) Stratosphere (b) Mesosphere (c) Thermosphere d) Tropopause is the accumulation and adverse effects of contaminants or pollutants on human health and welfare (4) Pollutants are ubiquaitous because la) They can be everywhere (b) The can be in form of solid liquid and gas (c) (a) and (b) (d) All of the above (5) Xenobiotic waste are (a) Compounds formed due to pre-industrial contamination b) Compounds formed due to post-industrial contamination (c) Familiar to natural ecosystem (d) More subject to degradation. (6) The phase on the pure culture bacteria growth curve in which number of organisms increase exponentially for a finite period of time is known as the (a) Log phase (b) Lag phase (c) Death phase (d) Growth phase (7) Bacteria in the pure culture could not continue to increase ad infinitum. Why? (Spts) (8) Sand is easier to sample than rain; true or false (9) Suspension of airborne particles that contain living organisms (a) Bioaerosols

Explanation / Answer

1) The correct option is d i.e oxygen iss most abundant in its composition.

2)Troposphere and mesosphere have decrease in temperature with increase in height. So the correct answer is option b.

3)Pollution

4)the correct option is a.

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