Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuCO3 Cu(OH)2 Cu(NO3)2 CuO CuSO4 CuCO3 Cu(OH)2 Cu(NO3)2 CuO CuSO4 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Oxygen has (+) oxidation number only in C12O OF2 N2O H2O (2) C12O OF2 N2O H2O (2) ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of lemon is due to the presence of which of the following ? Oxalic acid Citric acid Acetic acid Formic acid Oxalic acid Citric acid Acetic acid Formic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ferrous sulphate is used in water treatment as a/an Oxidizing agent Reducing agent Adsorbent Coagulant aid Oxidizing agent Reducing agent Adsorbent Coagulant aid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Carbon footprint can be reduced by Commuting by public transport Using energy efficient appliances Recycling waste materials All of these Commuting by public transport Using energy efficient appliances Recycling waste materials All of these ANSWER DOWNLOAD EXAMIANS APP
Chemistry An acid having basicity one is Sodium phosphate Sodium dihydrogen phosphate Phosphoric acid Disodium hydrogen phosphate Sodium phosphate Sodium dihydrogen phosphate Phosphoric acid Disodium hydrogen phosphate ANSWER DOWNLOAD EXAMIANS APP
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