19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
‘Good ozone’ is found in the
Which of the following is most essential for life?
…A… of pollution are those where a source of pollution cannot be identified. Here, A refers to :
Phosphate pollution is brought about by (AIPMT 1997)
Greenhouse effect is caused by: (AIPMT 2002, AFMC 2002)
When rain is accompanied by a thunderstorm, the collected rain water will have a pH value (AIEEE 2003)
Biological Oxygen Demand (BOD) is a measure of (AIIMS 2003)
Which one of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere? (AIPMT 2004)
Nitrogen oxides produced from the presence of (KET 2004)
The smog is essentially caused by the presence of : [Guj. CET 2004]
The basic components of the smog are (AMU 2005)
Use of chlorofluorocarbon is not encouraged because (KCET 2005)
The water pollutants mainly responsible for eutrophication are (Punjab PMET 2006)
Match the column I and column II and pick the correct matching from the codes given below. (Kerala CEE 2006) Column I Column II A. Peroxyacetyl nitrate 1. Waste incineration B. Polycylic aromatic 2. Global warming C…
Which of the following is secondary pollutant? (Manipal 2007)
How can we reduce the rate of global warming?
Acid rain is due to : I. Oxides of nitrogen II. Oxides of sulphur III. Methane present in the air
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
Which of the following is/are the greenhouse gases?
Atmospheric gases trap the sun’s heat near the earth’s surface and keep it warm. This is called …A… Here A refers to