19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Content of CO2 present in atmosphere is :
In pregnant women who have the habit of smoking the increased CO level in blood may induce harmful effects like :
In blood, when concentration of carboxyhaemoglobin reaches about 3-4%, the oxygen carrying capacity of blood …A… Here, A refers to
What is true about CO gas?
In an automobile engine, (at high temperature) when fossil fuel is burnt, N2 and O2 combine to yield :
Which of the following pollutant(s)catalyse(s) the oxidation of sulphur dioxide to sulphur trioxide?
Which of the following diseases is caused due to SO2?. I. Digestive diseases II. Asthma III. Bronchitis IV. Emphysema
SO2 gas is poisonous to:
Which of the following are major gaseous pollutants present in the troposphere? I. H2S II. Oxides of sulphur, nitrogen and carbon III. O3
Ozone layer absorbs mainly …A… Here, A refer to.
Ozone layer is present in: I. Mesosphere II. Hydrosphere III. Mesosphere IV. Stratosphere
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…
The process of ‘eutrophication’ is due to the (Kerala CEE 2008)
5L aqueous solution is kept in the presence of oxygen and suitable microorganism for five days at 20°C. If the O2 consumed is 0.2g, the BOD value of the sample is (EAMCET 2008)
Assertion (A): London smog is oxidising in nature. Reason (R): London smog contains O3, NO2 and hydrocarbons. (AIIMS2009)
UV radiations brings about (RPMT 2010)
Gas released during Bhopal Gas Tragedy was (RPMT 2010)
Global warming can be controlled by : (CBSE-AIPMT 2010)
Greenhouse effect is caused by (JCECE2010)
Identify the incorrect statement from the following. (AIEEE 2011)
‘Good ozone’ is found in the (AIPMT Mains 2011)