Which of the following pollutants is responsible for depletion of ozon

1.	Which of the following pollutants is responsible for depletion of ozone layer ?
A.	Unburnt hydrocarbon
B.	UV rays
C.	Chlorofluoro carbons
D.	Oxides of nitrogen
Answer» D. Oxides of nitrogen

Discussion

No Comment Found

Related MCQs

In the schematic flownet shown in the given figure the hydraulic potential at point is
A 4-hour rainfall in a catchment of 250 km produces rainfall depths of 6.2 cm and 5.0 cm in successive 2-hour unit periods. Assuming the φ index of the soil to be 1.2 cm/hour, the run-off volume in ha-m will be
Consider the following statements :The critical path in a network plan of a project1. helps in planning efficient time schedule2. indicates the shortest path in time3. helps in crashing the project judiciously4. helps in encouraging discipline in execution.Of these statements :
Which of the following pairs are correctly matched ?1. Alpha iron....non magnetic2. Beta iron....strongly magnetic3. Gamma iron....non-magnetic and capable of dissolving carbon.4. Delta iron....non-magnetic and absorbs very little carbon.Select the correct answer using the codes given below :
The height of a hydraulic jump in a stilling pool was found to be 10 cm in a model with / = 36. The prototype jump height would be
Consider the following statementsThe main reinforcement in the counterfort in a counterfort retaining wall of R.C.C is provided on the :1. inclined face in front of counterfort.2. bottom face in. back counterfort.3. inclined face in back counterfort.4. bottom face in front counterfort.Select the correct answer using the codes given below :
In the riveted connection shown in the given figure, the rivets subjected to maximum stress would include
Approximate ratio of the permeabilities of two clean soils having = 0.6 mm and = 0.3 mm is
Which of the following statements about design period are true ?1. It is concerned with economy of investment.2. It takes into account aspects like life of durability and ease or difficulty of capacity increase of installations.3. It considers the frequency of occurrence of extremes of river flow.4. It is concerned with estimating future requirements.Select the correct answer using the codes given below :
A bar , 4 cm is diameter and 4 m long is rigidly fixed at its ends. A torque of 12000 kg/cm is applied at a section of the bar, one metre from end . The fixing coupled and (in kg. cm) at the supports and will be respectively

Which of the following pollutants is responsible for depletion of ozone layer ?

Discussion

No Comment Found

Related MCQs

Reply to Comment