19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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)
BOD stands for (AMU 2012)
Which one of the following statements regarding photochemical smog is not correct? (CBSE, AIPMT 2012)
Photochemical smog is caused by light mediated reaction between : (AIPMT 2012)
Eutrophication is due to (AMU 2011) (a) SO ion present in water
Excess nitrate in drinking water can cause (Kerala CEE 2011)
Which of the following statements is not true ? (AIPMT 2011)
Pollution is (MHT CET 2010)
The chemical entities present in thermosphere of the atmosphere (EAMCET 2009) (a)O2 +, O+, NO+
DDT residues are rapidly passed through food chain causing biomagnification because DDT is (AIPMT 2009)
Antidote for carbon monoxide is/are (CG PMT, Haryana PMT 2009)
Photochemical smog is caused due to the presence of (Kerala CEE2009)
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 water pollutants mainly responsible for eutrophication are (Punjab PMET 2006)
Use of chlorofluorocarbon is not encouraged because (KCET 2005)
The basic components of the smog are (AMU 2005)
The smog is essentially caused by the presence of : [Guj. CET 2004]
Nitrogen oxides produced from the presence of (KET 2004)
Which one of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere? (AIPMT 2004)
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…
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
Which of the following belongs to secondary air pollutants?
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
Bad ozone is found in the :
Match the Column I with Column II and choose the correct option from the codes given below : Column I Column II A. SO2 B. NO2 C. CO 1. Binds with haemoglobin 2. Leads to stiffness of flower Buds 3. Irritant red haze i…