Air, water, soil, sunlight are called ……… factors.
A) Biotic
B) Abiotic
C) Chemical
D) Physical
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Which of the following substitution products is not formed when methane reacts with chlorine in sunlight ?
D) ethyl chloride
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The refractive index of glass with respect to air is 3/2 and the refractive index of water with respect to air is 3/2.
Correct option is D) 8/9
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The opening and closing of stomata is due to – A) Sunlight
Correct option is B) Osmosis
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A sound note emitted from a certain source has a velocity of 300 m/s in air and 1050 m/s in water. If the wavelength of sound note in air is 2 m
Correct option is: (C) 7 m
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If the pH level of soil is below 7 then the soil is
Correct option is A) acidic
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Identify the correct matching from the following. List – A 1) Soil below pH7 2) Soil above pH7
C) 1 – b, 2 – c, 3 – a
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Match the following: Group – A 1) Soil below pH 7 2) Soil above pH 7
Group – A Group – B 1) Soil below pH 7 H) Acidic 2) Soil above pH 7 E) Alkaline 3) Mineralization G) Soil microbes 4) Mycorrhiza A) Symbiosis 5) Biodegradable waste F) Dung 6) Non-biodegradable waste D) Radioactive waste 7) DDT C) Insecticide
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Chemical reactions which occur in presence of sunlight are called ………………. reactions. A) Thermal
C) Photo chemical
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state any five types of soil in India and explain the characteristics and distribution of soil?
Soil Type Characteristics Distribution Forest and mountain soils Differ from region to region depending on climate. Formation - due to mechanical weathering caused by snow, rain, temperature variation Chemical properties - are deficient in potash, phosphorus and lime. Nature...
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The soil found in Northern Great Plains and coastal plains Red soil Alluvial soil Black soil Laterite soil
Alluvial soil.
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