Chemistry MCQs

Page No. 72

Which of the following is an example of liquid in gas solution?


aOpals


bDust particles in smoke


cPaints


dFog


View Answer Fog

Which of the following solutions of H2SO4 is more concentrated ?


a1 Molar solution


b1 Molal solution


c1 Normal solution


dall have same concentration


View Answer 1 Molar solution

Ozone hole is substantial depletion of ozone in every year during__________________?


aAug – Nov


bSep – Nov


cNov – Dec


dDec - Jan


View Answer Sep – Nov

Which of the following is used as water disinfectant to avoid the formation of toxic compounds_________________?


aCl2


bO3


cClO2


dBoth B and C


View Answer Both B and C

Chlorination of water may be harmful if the water contains_________________?


aAmmonia


bDissolved oxygen


cCarbon dioxide


dAll


View Answer Ammonia

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


a10


b100


c10000


d100000


View Answer 100000

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


aDO


bBOD


cCOD


dAll of the above


View Answer All of the above

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


aCO


bNO2


cBoth A and B


dNone of the above


View Answer NO2

Which of the following is not primary pollutant__________________?


aSO3


bCO


cNO


dH2SO4


View Answer H2SO4

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


adinitrogen dioxide


bnitrogen dioxide


cchlorine gas


dchlorine dioxide


View Answer nitrogen dioxide

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