Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuSO4 Cu(NO3)2 CuCO3 Cu(OH)2 CuO CuSO4 Cu(NO3)2 CuCO3 Cu(OH)2 CuO ANSWER DOWNLOAD EXAMIANS APP
Chemistry Among the following iron ores, the highest percentage of iron content is found in– Magnetite Haemetite None of these Limnonite Magnetite Haemetite None of these Limnonite ANSWER DOWNLOAD EXAMIANS APP
Chemistry The value of gas constant R in Ergs deg–1 mole–1 is 8.314 × 107 8.413 × 107 8.341 × 107 4.183 × 107 8.314 × 107 8.413 × 107 8.341 × 107 4.183 × 107 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Cement containing excess amount of lime Becomes more strong Is slow setting Cracks during setting Is quick setting Becomes more strong Is slow setting Cracks during setting Is quick setting ANSWER DOWNLOAD EXAMIANS APP
Chemistry Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of Isobaric system Closed system Open system Isothermal system Isobaric system Closed system Open system Isothermal system ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one is the purest form of carbon Iron Graphite Diamond Coal Iron Graphite Diamond Coal ANSWER DOWNLOAD EXAMIANS APP
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