Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?

A. Nh2cl
B. Nhci2
C. Nci2
D. All of the above

Acid present in acid rain may be__________________?

A. H2so4
B. Hno3
C. Both a and b
D. None

Which of the following is not a condition for the formation of smog ?

A. Sufficient no
B. Sunlight
C. Less movement of air
D. Winds

In which of the following layer of atmosphere there is more thickness of ozone layer ?

A. Troposphere
B. Stratosphere
C. Mesosphere
D. Photosphere

Which of the following air pollutants is more dangerous for ozone layer ?

A. Cfc
B. Co2
C. Co
D. Oxides of nitrogen

Which statement is wrong ?

A. The amount of ozone layer is greater in the region close to the equator
B. Ozone acts as filter for uv radiations
C. In the equatorial region it acts as pollutant
D. Cfcs play effective role in removing o3 in the stratosphere

In the purification of portable water the coagulant used is_________________?

A. Alum
B. Nickel sulphate
C. Copper sulphate
D. Barium sulphate

Idea of pH and pOH was put forward by________________?

A. Gibbs
B. Einstein
C. Sorenson
D. Chadwick

Ka<10-3 means______________?

A. Very strong base
B. Very weak acid
C. Very strong acid
D. Very strong salt

Which of the following is a macro nutrient ?

A. Boron
B. Iron
C. Copper
D. Carbon