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Consider the following statements regarding SMOG: 1. SMOG was coined during the 1950's to describe a mixture of smoke and fog experienced in London 2. The principal pollutants in London SMOG are particulates and sulphur compounds  3. The London SMOG occurs generally early in the morning on cold wet winter days  Which of the above statements are correct?
In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements. Statement All fog is smoke. No smog is fog. Conclusion Some fog is smog. Some smog is fog.
The smog is essentially caused by the presence of
Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air's water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes
Presence of high concentration of ozone and smog in atmospheric air causes the
According to Naiya̅yikas we ascertain the relation of universal concomitance between x and y :  (A) We can determine the relation only if we can determine the relation of essential identity between x and y   (B) By perceiving that in all cases the presence of x is accompanied by the presence of y  (C) We can determine the relation only if we can determine the relation of cause and effect between x and y  (D) By not perceiving any instance where the presence of x is not accompanied by the presence of y or vice-versa.  Choose the correct answer from the options given below : 
What is the reason for the colour of soil being red in some parts of India? A. Presence of magnesium B. Presence of phosphate C. Presence of ferric oxide D. Presence of manure soil
Arvind Kejriwal inaugurated a truck-mounted anti-smog gun to combat the worsening dust pollution in the national capital. The anti-smog gun is fed by a water tank of hoe many litres?
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options.  P: Delhi’s air quality deteriorates with unfailing regularity, with large swathes of north India in the grip of suffocating smog, but the State governments that can make it easier for millions to breathe do not act with any sense of urgency.  Q: The smog that envelops the region is exacerbated by the burning of biomass in Punjab and Haryana, and the winter atmosphere is marked by weak ventilation.  R: It is unconscionable for governments, through indifference and inaction, to subject citizens to such toxic air, and cause extreme suffering especially among people with respiratory ailments and impaired lung function.  S: It has turned into a public health emergency in the capital, with the air quality index touching extremely hazardous levels in some parts, necessitating the closure of primary schools, has further lowered its standing.
Assertion (A): Photochemical smog occurs during the sunny day. Reason (R): When ultraviolet from the sun reacts with nitrogen oxides, NO2 goes through a complex series of reactions with hydrocarbons to produce components of photochemical smog. Select the correct response from the code given below: