Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuSO4 CuO CuCO3 Cu(OH)2 Cu(NO3)2 CuSO4 CuO CuCO3 Cu(OH)2 Cu(NO3)2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is used as a sowing agent in the preparation of soft drinks? Boric acid Phosphoric acid Phosphorus acid Salicylic acid Boric acid Phosphoric acid Phosphorus acid Salicylic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Soap helps in better cleaning of clothes because It gives strength to solution It absorbs the dirt Soap acts like catalyst It reduces the surface tension of solution It gives strength to solution It absorbs the dirt Soap acts like catalyst It reduces the surface tension of solution ANSWER DOWNLOAD EXAMIANS APP
Chemistry The minimum energy required for an effective collision is Threshold energy Activation energy Free energy Internal energy Threshold energy Activation energy Free energy Internal energy ANSWER DOWNLOAD EXAMIANS APP
Chemistry In arc welding, Argon is used because of its Ability to lower the melting point of the metal High flammability Low reactivity with metal High calorific value Ability to lower the melting point of the metal High flammability Low reactivity with metal High calorific value ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sea weeds are important source of Iodine Bromine Iron Chlorine Iodine Bromine Iron Chlorine ANSWER DOWNLOAD EXAMIANS APP
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