19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Assertion (A): CO and NO combine with haemoglobin. Reason (R): Both have equal affinity for haemoglobin. (AIIMS 2012)
Match the Column I with Column II and choose the correct option from the codes given below : Column I Column II A. Gaseous air pollutants B. Particulate pollutants 1. CO2 2. Smoke 3. Smog 4. O3 Codes A B
Which of the following is/are the harmful effect(s) of UV radiation? I. It causes mutation in the cell II. UV radiation leads to ageing of skin III. It kills many phytoplankton IV. It causes global warming
Polar stratospheric cloud is formed over Antarctica during ..A.. Here, A refers to
Which one of the following statements is not true? (Karnataka NEET 2013)
Assertion (A): Nitrogen oxides are one of the components of photochemical smog. Reason (R): Vehicular pollution is a major source of nitrogen oxides (AIIMS 2013)
Which one of the following is not a common component of photochemical smog? (CBSE AIPMT 2014)
Among the following, the one which is not a ‘greenhouse gas’, is (Kerala CEE 2014)
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)
In summer season, nitrogen dioxide and methane reacts with …A… and …B… atoms forming chlorine sinks. Here, A and B refer to
Which of the following is a sink for CO? (NEET 2017)
Which of the following chemicals are used to manufacture methyl isocyanate that caused “Bhopal tragedy”? (JIPMER 2018) (i) Methylamine (iii) Phosgene (iii) Phosphine (iv) Dimethylamine
Chlorine sinks are formed during : I. Summer II. Winter
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity? (NEET 2018)
Among the following, the one that is not a greenhouse gas is (NEET 2019)
Assertion: Photochemical smog results from the action of sunlight on NOx and hydrocarbons. Reason: It occurs in warm, dry and sunny climate. (AIIMS 2019)
Which of the following statement is NOT true about acid rain? (NEET 2020)
The incorrect statement about carbon monoxide is (NEET 2020)
Ozone hole is found over :
Which of the following options represents the PAN?
Match list-I with list-II (NEET 2021) List – I List – II (a) 2SO g O g 2SO g -> (i) Acid rain (b) hv HOCl g OH Cl -> (ii) Smog (c) CaCO H SO CaSO H O CO -> (iii) Ozone depletion (d) hv NO g NO g O g -> …
The pollution due to oxides of sulphur gets enhanced due to the presence of:
Presence of which fuel gas in the exhaust fumes shows incomplete combustion of fuel
Photochemical smog has …I… concentration of oxidising agents and is therefore, called as …II… smog. Here, I and II refer to :
The region which is greatly affected by air pollution is