Chemistry The percentage of oxygen in air is approximately 0.21 0.78 0.01 1 0.21 0.78 0.01 1 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following vitamins is generally excreted by human in urine? Vitamin C Vitamin D Vitamin B None of these Vitamin C Vitamin D Vitamin B None of these ANSWER DOWNLOAD EXAMIANS APP
Chemistry The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle? 0.01 minute 100 years 13 days 3 billion years 0.01 minute 100 years 13 days 3 billion years ANSWER DOWNLOAD EXAMIANS APP
Chemistry The polymerisation of which often following is used in manufacturing of polythene in industry ? Acetylene Methane Styrene Ethylene Acetylene Methane Styrene Ethylene ANSWER DOWNLOAD EXAMIANS APP
Chemistry Oxygen which is vital for life is a product of photosynthesis and comes from Water Carbon dioxide Oxides of mineral elements Carbonates from soil Water Carbon dioxide Oxides of mineral elements Carbonates from soil ANSWER DOWNLOAD EXAMIANS APP
Chemistry 24 carat of diamond is equal to 91% gold 200 mg 200 g 95% mg 91% gold 200 mg 200 g 95% mg ANSWER DOWNLOAD EXAMIANS APP
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