Chemistry Which one of the following contributes largely to the ‘green house effect’ ? Carbon dioxide Ozone Water vapour Carbon monoxide Carbon dioxide Ozone Water vapour Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Metal are good conductors, because The molecules in them are very close to each other They contain reflecting surface The molecules in them collide very freely They contain free electrons The molecules in them are very close to each other They contain reflecting surface The molecules in them collide very freely They contain free electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant metal in the Earth’s crust is Aluminium Zinc Iron Copper Aluminium Zinc Iron Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry The depletion of Ozone layer is mainly due to Radioactive rays Chlorofluorocarbons Volcanic eruptions Aviation fuels Radioactive rays Chlorofluorocarbons Volcanic eruptions Aviation fuels ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following mineral does not contain oxygen ? Calcite Bauxite Cryolite Haematite Calcite Bauxite Cryolite Haematite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used to increase the anti-knocking property of petrol ? Tetramethyl lead Triethyl lead Tetraethyl lead Trimethyl lead Tetramethyl lead Triethyl lead Tetraethyl lead Trimethyl lead ANSWER DOWNLOAD EXAMIANS APP
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