Chemistry Ozone saves the biosphere by absorbing high energy radiations called ________ . Ultraviolet rays (UV) Infra-red (IR) Gamma rays X–rays Ultraviolet rays (UV) Infra-red (IR) Gamma rays X–rays ANSWER DOWNLOAD EXAMIANS APP
Chemistry Air is said to be saturated when : It blows over the barren land Its pressure is minimum It contains maximum content of water vapour Its thickness is maximum It blows over the barren land Its pressure is minimum It contains maximum content of water vapour Its thickness is maximum ANSWER DOWNLOAD EXAMIANS APP
Chemistry The lowest layer of earth's atmosphere is Stratosphere Troposphere Mesosphere Ionosphere Stratosphere Troposphere Mesosphere Ionosphere ANSWER DOWNLOAD EXAMIANS APP
Chemistry Helium gas is filled in ballons because Its atomic number is 2 It is one of the constitutents of water It is a noble gas It is lighter than air Its atomic number is 2 It is one of the constitutents of water It is a noble gas It is lighter than air ANSWER DOWNLOAD EXAMIANS APP
Chemistry Who developed the model of atomic structure ? Faraday Alfred Nobel Volta Bohr and Rutherford Faraday Alfred Nobel Volta Bohr and Rutherford ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heating of a ore below its melting point in the absence of air is known as Roasting Refining Calcination Smelting Roasting Refining Calcination Smelting ANSWER DOWNLOAD EXAMIANS APP
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