Chemistry Ozone saves the biosphere by absorbing high energy radiations called ________ . Ultraviolet rays (UV) Gamma rays X–rays Infra-red (IR) Ultraviolet rays (UV) Gamma rays X–rays Infra-red (IR) ANSWER DOWNLOAD EXAMIANS APP
Chemistry The polymer obtained by the condensation of hexamethylene diamine and adipic acid is : Bakelite Nylon 66 Terylene Tollen's Bakelite Nylon 66 Terylene Tollen's ANSWER DOWNLOAD EXAMIANS APP
Chemistry Bone ash contains Calcium phosphate Calcium sulphate Phosphoric sulphate Calcium hypophosphate Calcium phosphate Calcium sulphate Phosphoric sulphate Calcium hypophosphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following is pure matter ? Iron Carbon–dioxide Brass Air Iron Carbon–dioxide Brass Air ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following metals pollutes the air of a city having large number of automobiles? Cadmium Lead Chromium Copper Cadmium Lead Chromium Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Silicon is used in Transistors Solar energy devices Semiconductors All of these Transistors Solar energy devices Semiconductors All of these ANSWER DOWNLOAD EXAMIANS APP
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