Chemistry Hardest allotrope of carbon is Lamp black Graphite Coke Diamond Lamp black Graphite Coke Diamond ANSWER DOWNLOAD EXAMIANS APP
Chemistry In deep-sea diving, divers use a mixture of gases consisting of oxygen and Helium Nitrogen Argon Hydrogen Helium Nitrogen Argon Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives Hydrogen at cathode and oxygen at anode Copper at cathode and oxygen at anode Copper at cathode and anodes dissolve to give copper Copper at anode and oxygen at cathode. Hydrogen at cathode and oxygen at anode Copper at cathode and oxygen at anode Copper at cathode and anodes dissolve to give copper Copper at anode and oxygen at cathode. ANSWER DOWNLOAD EXAMIANS APP
Chemistry In arc welding, Argon is used because of its High calorific value Low reactivity with metal Ability to lower the melting point of the metal High flammability High calorific value Low reactivity with metal Ability to lower the melting point of the metal High flammability ANSWER DOWNLOAD EXAMIANS APP
Chemistry The minimum energy required for an effective collision is Internal energy Activation energy Free energy Threshold energy Internal energy Activation energy Free energy Threshold energy ANSWER DOWNLOAD EXAMIANS APP
Chemistry Normal rainwater is slightly acidic due to the presence of Sulphur dioxide Methane None of these Carbon dioxide Sulphur dioxide Methane None of these Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
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