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1. For what fraction of annual CO 2 emissions from fossil fuel burning are automobiles responsible? 2. A 1000-kg car travels 1.6 × 10 4 km/yr. What is the ratio of the mass of
Following Hund's rule which element contains six unpaired electron: (1) Fe (2) Co (3) Ni (4) Cr Ans: Cr
Chloroform or trichloromethane, CHCl 3 It is a significant trihalogen derivative of methane. It was given by Liebig in year 1831 and its name chloroform was proposed by Dumas
Silver salt method for acids - Chemical methods It is based upon the fact that silver salt of an organic acid on heating provides residue of metallic silver.
percentage concentration of 18-k gold bracelet, 150 grams
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Write a feature which will distinguish a metallic solid from an ionic solid. a) Explain 'order of a reaction'. b) What is an emulsion?
Q. A sample of water on analysis was found to contain the following analytical data: Mg (HCO 3 ) 3 = 16.8mg/L, MgCl 2 = 19mg/L, Mg (NO 3 ) 2 = 29.6 ppm, CaCO 3 = 20 p
Write down the chemical equations for the total burning of propane and butane gas in air. Show whether the substances are liquid (l), gaseous (g), or solid (s) under
Elements of Group 13 are namely, boron, aluminium, gallium, indium and, thallium. While studying the alkali and alkaline earth metals, you have seen that all the elements of these
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