19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Classical smog is a mixture of
When the pH of the rain water drops below 5., it is called …A…A, Here, A refers to :
Rain water is slightly acidic because I. Water reacts with CO2 and forms H2CO3 II. Rain water reacts with CO and forms H2CO3 Identify the correct option:
pH of normal rain water is :
Excess use of chemical fertilizers increases the quantity of…A… (air pollutant) in the atmosphere. Here, A refers to..
Which of the following green gas is damaging the ozone layer?
Which of the following greenhouse gas is released in paddy field? I. CFCs II. CH4 III. SO2
Carbon monoxide is mainly released into air by :
Which of the following statement(s) is//are true about carbon monoxide?
Which of the following are the harmful effect of nitrogen dioxide? I. It retards the rate of photosynthesis II. It causes respiratory disease in children III. It is toxic to living tissues.
Which of the following options represents the PAN?
Which of the following are involved in the formation of PAN? I. NO2 II. O3 III. Unburnt hydrocarbon IV. CO2
How do CFCs cause thinning of ozone layer in stratosphere ?
The main reason of ozone layer depletion is : I. release of CFCs II. release of CO2 III. release of CH4
Photochemical smog has …I… concentration of oxidising agents and is therefore, called as …II… smog. Here, I and II refer to :
The depletion of ozone layer is known as I. ozone hole II. ozone centre III. ozone point
The depletion of ozone hole was first reported in …I… over Antarctica. Here I refers to :
Ozone hole is found over :
Chlorine sinks are formed during : I. Summer II. Winter
In summer season, nitrogen dioxide and methane reacts with …A… and …B… atoms forming chlorine sinks. Here, A and B refer to
Polar stratospheric cloud is formed over Antarctica during ..A.. Here, A refers to
Bad ozone is found in the :
The consequence of global warming may be… I. Increase in average temperature of the earth II. Melting of Himalayan Glaciers III. Increased biochemical oxygen demand. IV. Eutrophication
Which of the following belongs to secondary air pollutants?
Match the Column I with the Column II and choose the correct option from cods given below : Column I Column II A. Normal B. Acid rain 1. H2CO3 2. HNO3 3. HCl 4. H2SO4 Codes : A B