Chemistry Which of the following is not a method of preparing oxygen? Electrolysis of water Fractional distillation of liquid air Decomposition of manganese dioxide Decomposition of potassium permanganate Electrolysis of water Fractional distillation of liquid air Decomposition of manganese dioxide Decomposition of potassium permanganate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Catalytic converters are generally made from : Carbon Transition metals Hydrogen Alkaline metals Carbon Transition metals Hydrogen Alkaline metals ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nylon threads are made of Polyamide polymer Polyvinyl polymer Polysaccharide Polyester polymer Polyamide polymer Polyvinyl polymer Polysaccharide Polyester polymer ANSWER DOWNLOAD EXAMIANS APP
Chemistry The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is 5x x/6 5x/36 7.2 x 5x x/6 5x/36 7.2 x ANSWER DOWNLOAD EXAMIANS APP
Chemistry The “King of Metals” is : Silver Aluminium Iron Gold Silver Aluminium Iron Gold ANSWER DOWNLOAD EXAMIANS APP
Chemistry Normal rainwater has a pH level of 5.6 3.2 8.3 6.3 5.6 3.2 8.3 6.3 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS