Chemistry Earth’s atmosphere is an envelope of gases extending to a height of 100 km 300 km 150 km 200 km 100 km 300 km 150 km 200 km ANSWER DOWNLOAD EXAMIANS APP
Chemistry In arc welding, Argon is used because of its High calorific value Low reactivity with metal Ability to lower the melting point of the metal High flammability High calorific value Low reactivity with metal Ability to lower the melting point of the metal High flammability ANSWER DOWNLOAD EXAMIANS APP
Chemistry Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234 A C B D A C B D ANSWER DOWNLOAD EXAMIANS APP
Chemistry Name two elements that find wide application in transistor industry Iridium and Germanium Tungsten and Platinum Silicon and Germanium Carbon and Platinum Iridium and Germanium Tungsten and Platinum Silicon and Germanium Carbon and Platinum ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which is a natural colloid ? Urea Cane-sugar Sodium chloride Blood Urea Cane-sugar Sodium chloride Blood ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following gases has the highest calorific value? Coal gas Water gas Indane gas Natural gas Coal gas Water gas Indane gas Natural gas ANSWER DOWNLOAD EXAMIANS APP
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