19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Match the terms given in Column I with the compounds given in Column II and choose the correct option from the codes given below. Column I Column II A. Acid rain B. Photochemical smog C. Combination with haemoglobin…
CO emitted automobiles prevents O2-transport to body tissues by:
Match the Column I with the Column II and choose the correct option from the codes given below. Column I Column II A. Nuclear power plant B. Burning of fossil fuel C. Solar energy 1. Radioactive wastes 2. Release of …
‘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 compounds helps in achieving equilibrium between O2 and CO2 in atmosphere? (EAMCET 2008)
Green chemistry means such reactions which : (AIPMT 2008)
Freon gas causing stratospheric ozone depletion is mainly released from : (WB CET 2008)
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)
Photochemical smog is caused due to the presence of (Kerala CEE2009)
Antidote for carbon monoxide is/are (CG PMT, Haryana PMT 2009)
DDT residues are rapidly passed through food chain causing biomagnification because DDT is (AIPMT 2009)
The chemical entities present in thermosphere of the atmosphere (EAMCET 2009) (a)O2 +, O+, NO+
Pollution is (MHT CET 2010)
UV radiations brings about (RPMT 2010)
Gas released during Bhopal Gas Tragedy was (RPMT 2010)
Global warming can be controlled by : (CBSE-AIPMT 2010)
Assertion: (A) London smog is produced when carbon soot particles combine with gaseous oxides of sulphur. Reason: Presence of carbon particles and SO2 makes it reducing in nature. (AIIMS 2017)