Question
Which of the following pollutants is the major
contributor to photochemical smog?Solution
Ozone : • Ozone is an allotrope of Oxygen, with molecular formula 03. • It is stabilised by resonance i.e. delocalisation of electrons. • It is a pale blue coloured gas present in our the stratosphere layer. • It protects us from the harmful Ultraviolet Rays coming from the sun. • The chlorofluorocarbons (CFCs) are the ozone-depleting agents originating from Air Conditioners, Refrigerators and Aerosols. • Montreal Protocol was signed on September 16, 1987, for the protection of Ozone, that entered into force on January 1, 1989. • But when Ozone is present at ground level, instead of atmosphere it acts as a pollutant.
Statements: J ≥ K > L ≥ M < E < F < G
Conclusions: I.  J > M                      II. G > L
...Statements:
S ≥ T ≤ D > P; F ≥ T > J ≥ Y
Conclusions:
I) Y < S
II) F > P
Statements: G@B; W#Z; B%W
Conclusions:
I) G@Z
II) Z@B
Statements: C = A ≤ H < K ≥ L = Q; S = T ≥ K
Conclusion: I. C < T II. A = S
Statements: W ≤ T = R; T < U < S; X = W ≥ Y
Conclusions:
I. S > Y
II. W ≥ S
III. U ≥ Y
Which of the following does not make J @ K and R # K definitely not true?
Statements: P > Q ≥ R > S; U ≥ T < S; V > U
Conclusions:
I. P > V
II. Q > T
III. P ≤ UÂ
Statements: Q © E, S % C, E $ S, C @ AÂ
Conclusions:Â
I. A © CÂ
II. S % AÂ
III. C © Q
Statements:Q = S > T > Z; T > Y = H < I
Conclusions: I. Z > H II. I > Z
Statements:Â J # K # L $ T & A % B % C
Conclusions :         I. A @ C                 II. A & C          �...
