19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The ozone layer is present in
Which of the following is most abundant hydrocarbon pollutant
Formation of ozone in the upper atmosphere from oxygen takes place by the action of
Ozone is an important constituent of stratosphere because it
Which of the following is not involved in the formation of photochemical smog?
Formation of London smog takes place in
Which forms the part of hazy fumes of photochemical smog
The statement which is not true
The substance which is a primary pollutant?
The aromatic compounds present as particulates are
Which of the following statement is false?
Which of the following chemical, harmful to ozone, is released by chlorofluoro carbon
Which of the following acts as a sink for CO?
The greenhouse effect is caused by
Atmospheric gases trap the sun’s heat near the earth’s surface and keep it warm. This is called …A… Here A refers to
In cold places flowers, vegetables and fruits are grown in glass covered areas called …A…here A refers to :
Which of the following gases cause global warming ? I. CO2 II. O3 III. CO IV. Chlorofluorocarbons (a)I, II and III
Green plants require CO2 for
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?
Carbon monoxide is mainly released into air by :
Which of the following statement(s) is//are true about carbon monoxide?
Which of the following are the harmful effect of nitrogen dioxide? I. It retards the rate of photosynthesis II. It causes respiratory disease in children III. It is toxic to living tissues.