Which of the following are the conditions of colligative properties_______________?

A. Non-electrolye solute
B. Non-volatile solute
C. Dilute solution
D. All of the above

When common salt is dissolved in water ?

A. Boiling point of water decrease
B. Boiling point of water increase
C. Boiling point of water remains same
D. None of the above

Requirement of macronutrient per acre of the land is_________________?

A. 5 to 200 kg
B. 20-200 kg
C. 200-400 kg
D. 30-400 kg

Which of the following is not a secondary pollutant_________________?

A. Ozone
B. Carbonic acid
C. Sulphuric acid
D. Carbon dioxide

Major cause of SO2 on global scale is__________________?

A. Volcanoes
B. Electric sparks
C. Combustion
D. All

The yellow colour in photochemical smog is due to presence of__________________?

A. Dinitrogen oxide
B. Nitrogen dioxide
C. Chlorine gas
D. Chlorine dioxide

Which of the following is not primary pollutant__________________?

A. So3
B. Co
C. No
D. H2so4

Which of the following gases is the main cause of acid rain ?

A. Co
B. No2
C. Both a & b
D. None of the above

Which of the following factors help to measure quallity of water ?

A. Do
B. Bod
C. Cod
D. All of the above

A single chlorine free radical can destroy how many ozone molecules ?

A. 10
B. 100
C. 10000
D. 100000