Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuO Cu(NO3)2 CuCO3 Cu(OH)2 CuSO4 CuO Cu(NO3)2 CuCO3 Cu(OH)2 CuSO4 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The value of gas constant R in Ergs deg–1 mole–1 is 8.413 × 107 4.183 × 107 8.314 × 107 8.341 × 107 8.413 × 107 4.183 × 107 8.314 × 107 8.341 × 107 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical name of ‘Common salt’ is Sodium nitrate Sodium chloride Ammonium chloride Calcium chloride Sodium nitrate Sodium chloride Ammonium chloride Calcium chloride ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the most commonly used substance in fluorescent tubes? Sodium vapour and neon Mercury vapour and argon Mercury oxide and neon Sodium oxide and argon Sodium vapour and neon Mercury vapour and argon Mercury oxide and neon Sodium oxide and argon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Mixture can be Pure substance Homogeneous Heterogeneous Both A and B Pure substance Homogeneous Heterogeneous Both A and B ANSWER DOWNLOAD EXAMIANS APP
Chemistry The BOD values of water indicate the Amount of ozone used for biochemical oxidation Amount of organic debris Amount of oxygen used for biochemical reduction Amount of oxygen used for biochemical oxidation Amount of ozone used for biochemical oxidation Amount of organic debris Amount of oxygen used for biochemical reduction Amount of oxygen used for biochemical oxidation ANSWER DOWNLOAD EXAMIANS APP
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