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2800 BC) ploughed agricultural field ever revealed through an excavation.". It has been found south east of the pre-Harappan settlement, outside the fort. " Kalibangan excavations in present western Rajasthan shows a ploughed field, the first site of this nature in the world.
Which of the following is an ore of calcium?
Which of the following reactions is a displacement reaction?
CALCOCITE is an ore of :
Which of the following colour of white light has the maximum wavelength?
The function of quick lime in soda lime mixture is to
What is the atomic number of silicon, a component of quartz?
What are Sodium benzoate and Sodium metabisulphite primarily used as?
Photochemical smog is a resultant of the reaction among
What is the primary purpose of using bleaching powder in drinking water?
Which chemical compound is used as a preservative in some sauces and beverages to retain color and inhibit bacteria?