Chemistry Gold dissolves in Acetic acid Aqua-regia Nitric acid Hydrochloric acid Acetic acid Aqua-regia Nitric acid Hydrochloric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry In upper layer of atmosphere ozone is formed by The action of ultraviolet rays on oxygen The action of nitrogen on oxygen in atmosphere Subjecting oxygen to high pressure The combination of oxygen molecules The action of ultraviolet rays on oxygen The action of nitrogen on oxygen in atmosphere Subjecting oxygen to high pressure The combination of oxygen molecules ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant element is Oxygen Silicon Calcium Nitrogen Oxygen Silicon Calcium Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is ozone depleting pesticide ? Ethylene ozonide D.T. Benzene Methyl bromide Ethylene ozonide D.T. Benzene Methyl bromide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone saves the biosphere by absorbing high energy radiations called ________ . X–rays Ultraviolet rays (UV) Gamma rays Infra-red (IR) X–rays Ultraviolet rays (UV) Gamma rays Infra-red (IR) ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heavy metals got their name because compared to other atoms they have Higher atomic radii Higher densities Higher atomic masses Higher atomic numbers Higher atomic radii Higher densities Higher atomic masses Higher atomic numbers ANSWER DOWNLOAD EXAMIANS APP
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