Chemistry Question Bank

Which of the following reaction(s) is/are happen during the formation of O3 layer in stratosphere ? (a) UV O (g) O(g)+O(g) -> (b) UV O(g)+O (g) (g)O (g) (c) UV O (g) O2(g)+O(g)

Thermodynamically ozone is :

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)

Which of the following is secondary pollutant? (Manipal 2007)

The brown haze of photochemical smog is largely attributable to (Punjab PMET 2007)

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)

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)

Greenhouse effect is caused by (JCECE2010)

Identify the incorrect statement from the following. (AIEEE 2011)

‘Good ozone’ is found in the (AIPMT Mains 2011)

Which of the following statements is not true ? (AIPMT 2011)

Excess nitrate in drinking water can cause (Kerala CEE 2011)