Chemistry Why is water not suitable for putting out a petrol fire ? Petrol is too inflammable to be extinguished by water Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning The heat required for combustion of petrol is very low ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following metals form an amalgam with other metals ? Tin Lead Zinc Mercury Tin Lead Zinc Mercury ANSWER DOWNLOAD EXAMIANS APP
Chemistry The percentage of carbon in cost iron is : 3 to 5 0.5 to 1.5 6 to 8 0.01 to 0.25 3 to 5 0.5 to 1.5 6 to 8 0.01 to 0.25 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? Zinc and carbon Lead peroxide and lead Nickel and cadmium Iron and cadmium Zinc and carbon Lead peroxide and lead Nickel and cadmium Iron and cadmium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The number of electrons presents in H+ is zero two three one zero two three one ANSWER DOWNLOAD EXAMIANS APP
Chemistry Magnetite is Fe3O4 Fe2O3 FeCO3 2Fe2O3. 3H2O Fe3O4 Fe2O3 FeCO3 2Fe2O3. 3H2O ANSWER DOWNLOAD EXAMIANS APP
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